@@Scott_Buchanan I noticed that this same RUclips channel has a video back on November 1st of 2020 titled, ' 350 LT1 or LT4 HEADS ON 4.3L L99? WILL THE FIT?' I myself have not viewed the 33 minute video yet, but sounds interesting.
@@sikbrik You are correct, the L99 out of the Chevrolet Caprice is a V-8, but we were referring to the LU3 4.3L V-6 out of GM's light duty trucks and vans.
I've always wanted to build one and stab it in a small rear wheel drive import like a Starlet or a Datsun 210 ! I mean the SBC has been proven time and time again and that's all a 4.3 is a 350 with 2 cylinders chopped off .
Rich, keep the Vortec heads so "the other guys" can replicate your efforts. Find the vortec heads' potential on the 4.3, perhaps just springs and pocket/short turn radius porting. There's a marine mercruiser intake manifold, single plane, for vortec heads on Amazon for about $250. It's a low profile speadbore cast iron intake setup for vortec head with the 8 vertical bolts. The Brodix stuff would be cool for the other other guy$. Most of us don't have tho$e pockets. Thanks for the content man!
I am ANY fan of the 6 cylinder setup!!! Especially since the Buick 3.8 inter cooled turbo V-6! The 6 cylinder engines, never really got their full appreciation of their potential and power abilities!!!! The first engine I ever built… was a 300 6-cylinder Ford!! Even though it had a 3-speed behind it…. It was truly a terror, from stoplight to stoplight, in my high school days. I had a Muskegon .514” lift cam in it, with a Clifford aluminum, 4-barrel intake, and a set of Cyclone Headers on it with duals…. Also had. 3.55:1 rear end! Man…. I had ALOT of fun annililating Iroc Camaros back then!! Those tuned port 305’s couldn’t hold a candle to me man…. Ahhh the fun we used to have….
So true, I had Typhoon #0046. I always said the GM engineers put 10 lbs of s#!t in a 5 lb bag with the SY/TY's. But it was fun driving around and getting looks from people in the know.
I have an S10 and just working on a 4.3 in that little truck can be aggravating. I don’t even want to know how much more it can be with a turbo setup on it.
I seriously think Richard never sleeps. Still, I love how much great information he can spout off in every one of his videos. The 4.3 might not be a super dollar-friendly base for big power, but there are still a few folks out there building these things for boats, S-10s etc. that will find this invaluable. I’d really like to see what a split-pin 4.3 with the Brodix heads and a single plane with a healthier cam would do with that CXRacing unit. Now that would be a quick little fine rig.
Send me a Crower or billet crankshaft and I'll show you even with your choice of either hyd or a solid roller haha. Cause my stock cranks are prob gonna snap.
There is just really marine application can be modded for auto use have put a 4.3 in Buick regal g body with mild but fully built bottom end was good for 650 low boost
So do I.... I don't think these aftermarket performance parts manufacturers realize how many of these are still in use and available for builders... Probably a pretty sizeable and surprizing number of people who would really appreciate it...
@@RANDOMNATION907 Take the Chrysler engine transmission combo from the Interpids. If someone was building a mid-engined kit car with a sub 2000 lbs chassis you got your engine transaxle in one package. The 3.5 had 225 horses from the factory. And for a four valve head it's not super wide.
Remember when GM took a prepped Syclone out to the salt flats. The next year a drive train engineer from Chrysler took a Comanche to Bonneville and took all of the records GM had set. He put the Comanche together in his garage
I love the 4.3’s I did some research and the newer 4.3 engines like 14+ newer heads slow great and there was a guy on Facebook that cut a Holley high rise and made a 6 cylinder one
@@tyrell2159 mine smokes on start up only. Has for many years. It was my dads truck and he really only drove it on short trips. He really wanted a V8 and I have all the stuff to swap it, but I'm reconsidering it and just build a new and better 4.3.
I had a Syclone, and it was really nice in a straight line. But the engine was all done at 4800 rpm. It was frustrating for a sports car guy like me to drive because the front end and rear end seemed to be on different schedules when negotiating a turn. It had a lot of initial understeer on turn-in, so I would crank a little more steering in. Then the rear end would start to come around, and I would have to unwind the wheel. The net result was that I could never carve a smooth arc through a turn, as in my Camaro. Another frustration was no manual transmission was available. The truck was great for passing traffic on two-lane roads. And when I put winter tires on it, the 0-60 acceleration on snow was stupendous. My fantasy was to put twin turbos on it and a cam that would get the engine to 5500 rpm, then a 6-speed manual, and an independent rear suspension. But i sold it before any of that could happen.
@303StreetMachines Thanks for the link. The video seemed familiar, so I scrolled down the comments and found a comment I made on it four years ago. I made almost the identical complaint about the handling back then.
Knew a guy who put a 4.3 in a Jeep CJ-7. It had the torque of the old 258 AMC straight six with much more hp up top. Ran it with an Edelbrock Performer carb and an HEI ignition. Almost perfect engine for a CJ.
My 87 R2500 Sierra has a 262 4.3L married to a thm400. I'm loving these ideas because I currently put down around 200hp at the flex plate. I do want to build it to be a better hauler as I'm always pulling stuff with it and driving all over Georgia for work.
Thank you!!!!! SO MUCH FUN!!!! Make those upgrades and port and polish the heads!!!!! WOW!!!! CHEAP, FAST, HORSEPOWER!!!! That is what hot rodding is all about!!!!! Add some ARP bolts for durability as well. So many basic options to start with.
Kurt urban and Dave Henninger have went thru the 4.3 from front to back. You may want to contact either of them for some very valuable info... If I remember correctly, they used Pontiac performance parts. Somehow GM made high performance parts for this engine, but labeled them as Pontiac to disguise the efforts. Hope this helps.
We flexed/bent a SyTy crankshaft between 600-650hp crankshaft. The only sign was a slight drop in the hot oil pressure, after disassemble we found it wiped a main bearing over an oil feed hole. Good luck very interested in the follow up mods!
Rich: Perhaps the thing to have tried would've been a Edelbrock Performer TBI manifold, bored-out & fitted with the TBI unit from a Mk 5 454 fitted with the injector spacer Holley offers for the GM TBI units. I'd still be blow-through, but at least you'd have a larger plenum in the manifold, and better control over fueling while introducing the fuel soon--which you say is best for best performance with injection--to help cool the boost charge.
I had a new '92 Astro Van with the 4.3L. It was a peppy motor considering it was in a van and the weight. I'm betting there are quite a few small cars that could fit the 4.3L versus a SBC. Thanks for the testing. Hey, I just bought a '03 Mustang convertible with the 3.8L V-6 yesterday. Maybe you can work on that one soon or maybe I just get it over with and do a LS swap ;-)
YES! Build for your application! Choose the heads, cam, and induction for what you want to do, then build the bottom end to stay under it! It's so simple like the boogaloo, yet it evades so many.
Something that might add to this valve floating issues. I had the same problem at higher rpm. I found out an easy, cheap helper fix depending on how high an rpm you're looking for. I ran a high pressure/high volume oil pump on my rebuilds and it really did work. Had to set value lash at "maximum" of 1/4 turn or it would hold the valves open and it runs like crap...just saying. 😎✌️
Try 1.6 rocker arms ls6 beehive springs and port the vortec heads. Try the marine fuel rail intake aswell would be nice to see. I have a 1998 gmc sonoma 4wd i would like to make in to a cyclone. Maybe one day.
We ran a 85 4.3. Probably had the swirl port heads. I took the tall TBI intake and adapted a Rochester 2bbl with some port work mainly for fuel distribution. Ran a "torque " cam in it with home brued headers 34 deg total timing. For a compact demolition car. It worked great . Ran it through about 5 derbies. Got hot a couple of times and would barely turn over. But we ran the Mobil racing oil. 1st place in 2. The last one was a big fight but the best in Van Wert county history. That's what I believe. THANKS FOR THE 4.3 VIDEOS
I like the way you described the issues with the 4.3. I got to see the prototype typhoon and cyclone's run at Detoit Dragway, 89, 90,91...and they were clicking off low 12's like nothing. Been a big fan ever since. I have a complete 4.3 TBI motor out of a 91 s10. I want to put it in my 75 Monza 2+2. The n/a results you had on the 4.3 would be a great place to start, compared to stock. To do a turbo, I would need Dyno access, and lots of it, that blows up the budget, unless I really limit the boost, 400hp is good with me. A centrifugal or roots would allow me to control boost, so I will be watching for more 4.3, trying to decide which way to go and how far!
You can get more lift by changing the Rocker arm ratio to 1.6. Cutting the center out of annual plane intake usually kills power. Instead, just cut a notch about 1/4" deep and 1" long on top-middle of the divider.
Yeah. I’ve only seen one pickup with it played with. Just not much out for the direct Injection stuff. They were limited to around 400whp and then couldn’t get it enough fuel.
If you want to go max-effort mat I suggest get ya a set of Champion Cylinder Heads in Palmn Coast Fla. Tom has the market cornered on those 4.3 V-6`s. They look nice, new pieces, machines them in house. I`m surprised I didnt see any comments about them below.
Awesome job on the 4.3 testing. I’ve got a ‘14 direct injection 4.3, and would love to see the horsepower gains with a cam and turbo setup. Any chance you could do a Big Bang test on one of these?
I had a 90 GMC S-15 with a 4.3. With a built 700r4 and powertrax diff locker. That thing would embarrass and leave factory hot rods at the red light. Made it even better that it looked like shit. 3 different primer colors and a rusty roof. I loved it.
I myself would love to see some mods on the 4.3 for the Astro/Safari. A lot of comments say throw a 350 at it but easier said than done in a van. I have an AWD and oil pan issues even worse. I would like to see real world mods for us, other,other guy's. Thanks Richard, best channel on YT 😁👍
Been waiting for you to do a 4.3 video. I had a built one in a SWB 2001 silvy that had 400 sleeves in it with aluminum heads and a custom ground cam it had a Mercury marine intake with the external injectors that truck outran a lot of V8 trucks i always wanted to Turbo it . Great Video Richard
@@richardholdener1727 your videos helped me pick out the parts needed for my 6.0/6.7 LQ4. Sent the 317 heads to TEA for the stage 2 porting, got the FAST LSX RT intake with 90mm Z06 throttle body, tick performance cam 214 int 0.571 lift, 224 ex 0.561 lift, 114 +4 LSA, harland sharp 1.7 roller rockers, comp cams roller lifters...and the spurt of the moment move when I brought the short block to the machine shop...ended up ditching the stock internals entirely and going with a Scat 408 stroker with 10.5-11.0 to 1 compression. Should be done in 8 weeks. I'm thinking 500-550 flywheel hp. What do you think it might have power wise?
@@richardholdener1727 will you please give me some more information about the 4.3 I am a huge fan and this is one of my favorite Chanel's next to high performance academy and project farm and speaking of project farm will you please compare the difference between gas and propane also different types of fuels? Please. I would love to hear back from you soon
@@richardholdener1727 There are a lot of Bowtie 18 degree heads out there. Splayed valve eve, if going wild. www.ebay.com/itm/Chevy-4-3-V6-Bow-tie-Aluminum-Cylinder-Heads-Pair-1X137747-ported-race-drag-st/303733686034?hash=item46b7f03f12:g:V94AAOSwbuFfdg3Z
I had a syclone mine was number 1967 of 3000 made I built the engine ported the heads ran a kenne bell front mount 36lb.hr injectors and a 20g turbocharger i ran mid 11's all day long with a 2,800 stall converter
Love the 4.3! Had one in a 1990 GMC S15, best engine I ever had! 290,000 mi on it when donated it to Rawhide. LOL It did leak oil from ever ware it could leak.
My first vehicle was a 1993 Chevrolet S10 Blazer Tahoe edition four-wheel drive and a 4.3 vortec under the hood and when I got rid of it it had 200,000 in the still running strong only thing major I had to do was a head gasketthat was a long time ago and I still yearn for a typhoon or cyclone! Maybe one day. Anyways I was ecstatic when I seen you boosted a 4.3 keep em Rollin in
What In-line 6 cyl (besides a 2JZ) would make a strong stroker? Smooth torque and lower RPM. I ask because I’m used to driving a manual transmission and prefer the RPM range of Diesel engines. But without the hassle of diesel.
Most any straight 6 makes good torque. I used to just stuff as big of piston in them as possible and try to get the best flowing head at low rpm avail with big valves and small runners. And would typically make a mule out of any of them. A straight engine naturally balances itself out so I just tryed to make a square bores out of them if poss. Meaning same size bore and stroke assuming rod ratio is decent. That will make make diesel pulling torque usually. 😉
I believe Speed o motive used to have a 4.3L crate motor. Id like to see this engine on 93 octane only once its sorted out. Comp 280HR cam? Beehive valve springs?
Used to be home of the original stock 4.3 v6 stroker cranks. Offset ground 4.3 cranks. We used to make them at my old speed shop and grind down the cranks to a 2" rod journal and use 350 rods. That place was around a long time. I assume hope it still is.
Seeing that black powder-coated Holley made me think of the 2-bbl Rich has been running on his 292 I-6 build, and it got me thinking: The Chrysler 383- & 400-ci V-8s both came standard with the Holley 2300 500-cfm 2-bbl, so what's wrong with using one [with an adapter] atop a Chevy 4.3L V-6 on a dual-plane square-bore manifold? Yes, I know they came with 4-bbl spread-bore carbs... but if I'm building an efficient, low-revving workhorse, I figure the vacuum signal I'd have with a 500-cfm 2-bbl would be far-better than what any 4-bbl could provide at WOT. Plus: No secondary tuning issues to worry about! ;)
I was happy with the stock 4.3 5speed in my Silverado pick up. Was good in my Sonoma too. Always would have liked the fuel economy with a bit more power though.
You can always find something to LS. I'm in a similar boat. I got everything to 5.7 hemi swap my b1500 but now I wanna just turbo the 318. If you turbo the 4.3 it will still make 350-400 HP . And be cool!!!
We have Syclone and Typhoon from 1992. As far as engines go, the Buick 3.8 is a much better engine, and setup than the 4.3 that came in the trucks. The 4.3 in that application made insane torque, but as you saw no revs, not a great head.
But the 3.8L had a weak oiling system which was later solved in the 3800. The 4.3L got good heads with the 96+ Vortec engine. Not sure what had the better heads in final form. Was it the Vortec head or the Series III head? Either way neither late model head adapts easily to early engines and their respective blocks and manifolds but there is potential for these compact engines. I honestly like seeing anything obscure being modified and run even if it doesn't lay down huge numbers
I have a 80s 4.3 I'm trying to restore came out of a van. I got a 4 barrel carbureted intake for it and a holley 600cfm. I have no idea whats gonna happen with it but I really want to put two turbos onto it too. I'm not sure how that'll work with the carbureted setup, I'm really new to a lot of the concepts I'm facing like the fuel system, boost, how your air system will work and won't work in it.
Everyone needs to get one other person to subscribe to Richard . this level of quality content from a guy with less then 90000 subs come on guys tell your friends. More views =bigger Richard . lets get Richard to a million subs in a year. Every car guy should be watching this guy
I would like to see you do a GMC 351 V6 from the 60s. The 351 could then be compared to the Chevy 350 V8. Some of the cool things about the GMC V6s Are that they have sodium filled exhaust valves, actively oiled camshaft lobe’s, massive blocks and low compression ratio. They should be able to take quite the boost pressure. But my personal reason for wanting these tested is that I have two 702 cubic inch GMC V12s that have several components in common with the 351. But of course there are virtually no aftermarket parts you would have to have the stock Cam reground and make new intake and exhaust manifolds. Making a new intake manifold looks very simple though.
You know... you could donate an engine to him. Lol. I love the 702. I’ve been looking at one sitting at an old tractor shop. Is like to put into an old Cadillac or similar. With boost.
My plan is to make the automotive version of a P 38 fighter plane from World War II. A huge V 12 on each side, a little one man cockpit in between. the 12s will be turbo charge just as the P 38 with 2 water cooled intercoolers mounted inside 2 V6-92 Detroit blower housing in the valleys of each of the V 12s.
The cast iron even fire crank is the weak point on these engines. An odd fire crank is stronger, but probably not the best choice for the street. It looks like the pre vortec intake was used. Edelbrock did make a vortec specific 4bbl intake. The ports in the vortec heads are significantly bigger than the earlier heads, so I suspect the correct intake is also larger than the one you used. Also GM performance made the high rise "Pontiac" Intake ,10093314 and a cross ram also. The cross ram is for raised runner heads.
is the valve train instability on the second test caused by boost (dynamic cylinder and manifold pressure on valves). If everything else was the same (cam, valve train weight, spring pressure, oil pressure /did you loose some to feed the turbo collapsing the lifters a little) do you normally have to add spring pressure with boost.
I have a 4.3 in my 91' Scottsdale. I've been following your 4.3 work and wondered when you might give us a further update? Also, what about using an aftermarket TBI system?
I have a TBI Vortec 4.3 in my garage that I planned to put in a Jeep YJ a few years ago. The previous owner pulled it from his 1500 pickup to install a 6.0 for towing purposes. I don't know much about 4.3's though, and so I'd appreciate any info that would help me determine exactly what I have, especially the year it was made. I've since sold my Jeep, so I don't need the engine now, but I'm considering keeping it for a future project.
I was a Typhoon owner for a while and given the choice between another one and a GN/T Type/TTA I would go 3.8 all day. To make any power you almost have to 4L80 swap a SyTy which is over 5k alone.
@@richardbristow14 If I still had it I'd LS swap it. But they're so limited in production numbers that getting parts is impossible. So instead of LS swapping a one of 2500 Typhoon I sold it and got a 4 door Trailblazer that's much newer, more common and the amount of power it makes cost 1/3 of making it with a 4.3. Besides a Grand National is the car that I first saw when I saw a 3 or 4 that kicked off my automotive obsession. It just sucks I was unable to pay the $27k for a 100% stock GNX #545 in 2001 when I saw it in Reynolds GA. Of the 547 made GM kept 547, 546 was wrecked making it the supposedly the last one made, registered and in private hands.
@@davidcallahan5157 Absolutely several trips to Bowling Green and several friends with low 9 second to low 11 second Buicks still running a heavily modified 200r4 and stock rear end.
What I'm going with in my truck is a tall deck 427 with some Brodix Dragonslayer 320 heads, and a Comp Cams 268H, the one with over .5 lift. I know everyone will say I don't have enough cam, but that's the way I built it. If I want to make a little more power, all I have to do is a cam change. If I want to make a lot more power, I'll just add a cam and Blower, because you can't beat a BBBC 🤘😁🤘!
@@thereluctantgearhead4544 I'm going to be using the truck to tow a camper to and from shows and camping, I shouldn't need much more than I'm putting out unless I want to have gallons per mile while I'm towing, LOL! I'm building it for longevity.
@@escuelaviejafarms well in that case, you should have used a pair of oval port heads. Them Brodix heads are kinda large for a torque engine. Room to grow tho.
A follow up test or a retest (however you want to look at it) would great. If you are able to do this test all over again, would you be willing to make a video of the components you chose and how you came to that decision?
Richard, you should look into big bore 4 cylinders, mainly a 3.7 mercruiser. Aluminum block with what I read a GM bell housing bolt pattern 429/460 big block ford head, pistons and connecting rods. Can pick these motors up for cheap.
The Brodix intake will only work with the head that it was design for. 23Degree or 18 degree intake port location is quiet a bit higher. When you go to that combo your gonna need some exotic valve train parts only made for those heads are required. I have built both the 12 degree and 18 degree versions and went with the odd fire crankshaft on the 18 degree version. As this becomes the limit in making power since split journal is limited to the 500 hp mark not to mention the rods. The next obstacle on the !8 degree would be finding a distributor ,as MSD no longer produces one. So even if your running a Carb you can get programable ignition and make a crank trigger. My 18 degree version is in progress now . As cam cores are not available for the firing order, I have found old busch series naturally aspirated cams. And that RPM range is way up there. So no streetable idle and also limits the power adders to small shots of nitrous even tho my intention was to build a multi-stage system with a 400 shot. oh well NA and A150 shot is the way I have to go and see what happens. Oh also the 18degree is 305.081 CID.
Finally! Iv been waiting for this one. Roadkill strapped a damn DIESEL TURBO! On it and made it look like junk with no potential. Like it's not literally 3/4 of a 350
Richard Holdener I’m going to look at one this weekend all stock 83k miles shortbed regular cab 2wd not sure how to go about getting more power down the road wasn’t sure if I should go with a turbo or supercharger or just cam it or if you had any other suggestions
I didn’t realize how much the 4.3 looks like a SB V8. I just had something different in my mind. Not that it would make a difference but is it or can it be as as durable as a regular V8 with forged components? Are they available for a 4.3 v6?
Hey there jus watching thru the end of the video and if you can wiggle another test of the old 4.3 maybe with a stock cam and try the 1.6 ratio rockers in place of adding camshaft. How does more rocker affect power curves in stock trim engines? I have a very stock engine both in my current truck and on a stand in the backyard and preparing for turbo application i plan to file the rings for more gap, self port the intake and heads, have ebay cheapo headers that need a little bashing in to clear spark plugs but all in all your info and numbers have me thinking i am going a lil far for my needs as i dont think i want to run more than 8 psi until exta funds for v8 swap come available. The motor was cheap to buy itself and instead of a cam i am thinking keep the power curves it does make for more low end torque 2800 and if larger rockers give a lil extra umph then that plus boost = happy truck engine numbers!! If ya were closer to AZ id volunteer a dyno mule or motor to see what they do!! Happy friday to ya and keep the horsepower screaming!!
What about a episode on what spark plug makes the most power 5.3 ( iridium copper core double Platinum) different brands possibly to see if e3 really makes the power that they claim and what timing / compression is most effective for those plugs
I love the 4.3L engine!!! I'm guessing Edelbrock could make some money off of us 4.3L people if they offered top end options. 😁
I would love if they would!!
If a 4.3 is 3/4 of a 350, could somebody take some aftermarket 350 heads and cut the front off?
@@Scott_Buchanan I noticed that this same RUclips channel has a video back on November 1st of 2020 titled, ' 350 LT1 or LT4 HEADS ON 4.3L L99? WILL THE FIT?' I myself have not viewed the 33 minute video yet, but sounds interesting.
@@Second-gear L99 is a v8 4.3
@@sikbrik You are correct, the L99 out of the Chevrolet Caprice is a V-8, but we were referring to the LU3 4.3L V-6 out of GM's light duty trucks and vans.
Answer to the question at the beginning: I'm a huge fan of the 4.3.
Have you laid eyes or hands on a marine turbo 4.3 with an aftermarket block and heads fully built low boost = about 650 hspr
I pulled with my 4.3 today. With a 5 speed behind it. No hot rod but it is a working mule
Good engine. I had a 1999 S-10 with one, bought it brand new, had 250 K on the clock when I sold it and was still running perfectly.
I've always wanted to build one and stab it in a small rear wheel drive import like a Starlet or a Datsun 210 ! I mean the SBC has been proven time and time again and that's all a 4.3 is a 350 with 2 cylinders chopped off .
Same all it is is a 350 with the rear 2 cylinders cut off basically huge fan of the 4.3 I'm gonna twin one one day with twin 45mm
Rich, keep the Vortec heads so "the other guys" can replicate your efforts. Find the vortec heads' potential on the 4.3, perhaps just springs and pocket/short turn radius porting. There's a marine mercruiser intake manifold, single plane, for vortec heads on Amazon for about $250. It's a low profile speadbore cast iron intake setup for vortec head with the 8 vertical bolts. The Brodix stuff would be cool for the other other guy$. Most of us don't have tho$e pockets. Thanks for the content man!
addmoreboost these can be found cheap at marine places as a lot of these engines are removed to make room for V8s
100%
@@vintagetintrader1062 l never see anything (CHEEP) AT THOSE MIRE. PLACES.
@@chriscatarcio9933CHEAP*
I am ANY fan of the 6 cylinder setup!!! Especially since the Buick 3.8 inter cooled turbo V-6! The 6 cylinder engines, never really got their full appreciation of their potential and power abilities!!!! The first engine I ever built… was a 300 6-cylinder Ford!! Even though it had a 3-speed behind it…. It was truly a terror, from stoplight to stoplight, in my high school days. I had a Muskegon .514” lift cam in it, with a Clifford aluminum, 4-barrel intake, and a set of Cyclone Headers on it with duals…. Also had. 3.55:1 rear end! Man…. I had ALOT of fun annililating Iroc Camaros back then!! Those tuned port 305’s couldn’t hold a candle to me man…. Ahhh the fun we used to have….
Regardless of how the test turned out it was cool to see a 4.3 on the dyno.
I definitely agree that these 4.3 Vortecs deserve far better aftermarket support, especially from Edelbrock, Holley, etc...
Owned a Syclone for a while. Was the funnest truck and the most infuriating vehicle to work on.
So true, I had Typhoon #0046. I always said the GM engineers put 10 lbs of s#!t in a 5 lb bag with the SY/TY's. But it was fun driving around and getting looks from people in the know.
I have an S10 and just working on a 4.3 in that little truck can be aggravating. I don’t even want to know how much more it can be with a turbo setup on it.
Try owning a syty and a 300zx and or a dsm one better get a good pair of shoes or a bike if ya wanna to go anywhere.
I dig the 4.3 V6. I'd be into seeing some a GM 3.4 V6 as well. They're dirt cheap and plentiful. Boost one to the moon!
I seriously think Richard never sleeps. Still, I love how much great information he can spout off in every one of his videos. The 4.3 might not be a super dollar-friendly base for big power, but there are still a few folks out there building these things for boats, S-10s etc. that will find this invaluable. I’d really like to see what a split-pin 4.3 with the Brodix heads and a single plane with a healthier cam would do with that CXRacing unit. Now that would be a quick little fine rig.
Send me a Crower or billet crankshaft and I'll show you even with your choice of either hyd or a solid roller haha. Cause my stock cranks are prob gonna snap.
I wish there was a good aftermarket for the 4.3
There is just really marine application can be modded for auto use have put a 4.3 in Buick regal g body with mild but fully built bottom end was good for 650 low boost
I replaced a starter motor in a boat with 4.3.
Damn starter under the engine with zero access.
So do I.... I don't think these aftermarket performance parts manufacturers realize how many of these are still in use and available for builders... Probably a pretty sizeable and surprizing number of people who would really appreciate it...
@@RANDOMNATION907
Take the Chrysler engine transmission combo from the Interpids. If someone was building a mid-engined kit car with a sub 2000 lbs chassis you got your engine transaxle in one package. The 3.5 had 225 horses from the factory. And for a four valve head it's not super wide.
Remember when GM took a prepped Syclone out to the salt flats. The next year a drive train engineer from Chrysler took a Comanche to Bonneville and took all of the records GM had set. He put the Comanche together in his garage
I love the 4.3’s I did some research and the newer 4.3 engines like 14+ newer heads slow great and there was a guy on Facebook that cut a Holley high rise and made a 6 cylinder one
Big fan of the 3/4 350! For only 160 hp it motivates my 1990 Jimmy s15 nicely, and it has 228k miles
Mine is a 4.3 powered 92 Chevrolet 1500 with 209k. Runs great.
seems like urs still young. mine is at 338xxx on the odometer. still going strong . no smoke
@@tyrell2159 mine smokes on start up only. Has for many years. It was my dads truck and he really only drove it on short trips. He really wanted a V8 and I have all the stuff to swap it, but I'm reconsidering it and just build a new and better 4.3.
Keep changing the oil you will have it for quite some time
same. my 4.3 89 s10 blazer is peppy as hell.
I’d love to see this thing with a mild port on the heads, correct springs and a bigger cam
I had a Syclone, and it was really nice in a straight line. But the engine was all done at 4800 rpm. It was frustrating for a sports car guy like me to drive because the front end and rear end seemed to be on different schedules when negotiating a turn. It had a lot of initial understeer on turn-in, so I would crank a little more steering in. Then the rear end would start to come around, and I would have to unwind the wheel. The net result was that I could never carve a smooth arc through a turn, as in my Camaro. Another frustration was no manual transmission was available. The truck was great for passing traffic on two-lane roads. And when I put winter tires on it, the 0-60 acceleration on snow was stupendous. My fantasy was to put twin turbos on it and a cam that would get the engine to 5500 rpm, then a 6-speed manual, and an independent rear suspension. But i sold it before any of that could happen.
@303StreetMachines Thanks for the link. The video seemed familiar, so I scrolled down the comments and found a comment I made on it four years ago. I made almost the identical complaint about the handling back then.
Knew a guy who put a 4.3 in a Jeep CJ-7. It had the torque of the old 258 AMC straight six with much more hp up top. Ran it with an Edelbrock Performer carb and an HEI ignition. Almost perfect engine for a CJ.
GREAT VIDEO RICHARD!!! A TUNED PORT INTAKE WOULD REALLY BE NICE !!!!! THIS COMBO COULD YIELD GREAT POWER AND ECONOMY. THANKS FOR SHARING!!!
I will be looking for the next 4.3 test!!!!!
My 87 R2500 Sierra has a 262 4.3L married to a thm400. I'm loving these ideas because I currently put down around 200hp at the flex plate. I do want to build it to be a better hauler as I'm always pulling stuff with it and driving all over Georgia for work.
It's also a matching numbers truck and I would love to get more power from the engine so I can keep it a matching numbers truck
Thank you!!!!! SO MUCH FUN!!!! Make those upgrades and port and polish the heads!!!!! WOW!!!! CHEAP, FAST, HORSEPOWER!!!! That is what hot rodding is all about!!!!! Add some ARP bolts for durability as well. So many basic options to start with.
Kurt urban and Dave Henninger have went thru the 4.3 from front to back. You may want to contact either of them for some very valuable info...
If I remember correctly, they used Pontiac performance parts. Somehow GM made high performance parts for this engine, but labeled them as Pontiac to disguise the efforts.
Hope this helps.
this was an old build and someone elses engine to begin with
We flexed/bent a SyTy crankshaft between 600-650hp crankshaft. The only sign was a slight drop in the hot oil pressure, after disassemble we found it wiped a main bearing over an oil feed hole. Good luck very interested in the follow up mods!
Rich: Perhaps the thing to have tried would've been a Edelbrock Performer TBI manifold, bored-out & fitted with the TBI unit from a Mk 5 454 fitted with the injector spacer Holley offers for the GM TBI units. I'd still be blow-through, but at least you'd have a larger plenum in the manifold, and better control over fueling while introducing the fuel soon--which you say is best for best performance with injection--to help cool the boost charge.
I had a new '92 Astro Van with the 4.3L. It was a peppy motor considering it was in a van and the weight. I'm betting there are quite a few small cars that could fit the 4.3L versus a SBC. Thanks for the testing. Hey, I just bought a '03 Mustang convertible with the 3.8L V-6 yesterday. Maybe you can work on that one soon or maybe I just get it over with and do a LS swap ;-)
i like that you show real world results, good or otherwise!
It doesn't always work out
YES! Build for your application! Choose the heads, cam, and induction for what you want to do, then build the bottom end to stay under it! It's so simple like the boogaloo, yet it evades so many.
I Absoutely loved the Syclone/Typhoon and totally agree the Grand National was the lesser of the great GM turbo v6's. All hail awd turbo v6 trucks!
I had a 92' Typhoon, it was a fun little suv. Lost it in the flooding of hurricane Harvey
Why didn’t you sue Harvey??
Something that might add to this valve floating issues. I had the same problem at higher rpm. I found out an easy, cheap helper fix depending on how high an rpm you're looking for. I ran a high pressure/high volume oil pump on my rebuilds and it really did work. Had to set value lash at "maximum" of 1/4 turn or it would hold the valves open and it runs like crap...just saying. 😎✌️
4.3l v6 LV3 is THE other super hero. PLEASE test one of these!!
Try 1.6 rocker arms ls6 beehive springs and port the vortec heads. Try the marine fuel rail intake aswell would be nice to see. I have a 1998 gmc sonoma 4wd i would like to make in to a cyclone. Maybe one day.
Better rocker arms is no problem as all the V8 valvetrain fits, the big issue is trying to find a valve cover to go over them
We ran a 85 4.3. Probably had the swirl port heads. I took the tall TBI intake and adapted a Rochester 2bbl with some port work mainly for fuel distribution. Ran a "torque " cam in it with home brued headers 34 deg total timing. For a compact demolition car. It worked great . Ran it through about 5 derbies. Got hot a couple of times and would barely turn over. But we ran the Mobil racing oil. 1st place in 2. The last one was a big fight but the best in Van Wert county history. That's what I believe. THANKS FOR THE 4.3 VIDEOS
By far my favorite video. There are millions of those 4.3’s out there. Including mine!
I like the way you described the issues with the 4.3. I got to see the prototype typhoon and cyclone's run at Detoit Dragway, 89, 90,91...and they were clicking off low 12's like nothing. Been a big fan ever since. I have a complete 4.3 TBI motor out of a 91 s10. I want to put it in my 75 Monza 2+2. The n/a results you had on the 4.3 would be a great place to start, compared to stock. To do a turbo, I would need Dyno access, and lots of it, that blows up the budget, unless I really limit the boost, 400hp is good with me. A centrifugal or roots would allow me to control boost, so I will be watching for more 4.3, trying to decide which way to go and how far!
You can get more lift by changing the Rocker arm ratio to 1.6. Cutting the center out of annual plane intake usually kills power. Instead, just cut a notch about 1/4" deep and 1" long on top-middle of the divider.
Need some follow ups on the 4.3l. Just bought an old school van so it's time to tinker
I love the old 4.3 (hell I daily one), but I'd love to see the LV3 (the aluminum DI 4.3 that came in everything after 2014)
Yeah. I’ve only seen one pickup with it played with. Just not much out for the direct Injection stuff. They were limited to around 400whp and then couldn’t get it enough fuel.
berk, is yours an s10 or c1500? Tbi? Spider? Carb? SFI? My backup daily/tow rig is a c1500 tbi 4.3 5 speed
Can the LV3 heads work on a old 4.3? That maybe the only easy head upgrade out there for old 4.3's
@@johnlewis8156 no, the difference is akin to comparing the old vortec 350 to the new LT1 based 6.2 or 5.3 in the trucks. Totally different animal.
yes
If you want to go max-effort mat I suggest get ya a set of Champion Cylinder Heads in Palmn Coast Fla. Tom has the market cornered on those 4.3 V-6`s. They look nice, new pieces, machines them in house. I`m surprised I didnt see any comments about them below.
Awesome job on the 4.3 testing. I’ve got a ‘14 direct injection 4.3, and would love to see the horsepower gains with a cam and turbo setup. Any chance you could do a Big Bang test on one of these?
That would be awesome!
@@Scott_Buchanan there are channels vids out there for this newer version, LV3 2014 and up getting 600hp pretty easily
I had a 90 GMC S-15 with a 4.3. With a built 700r4 and powertrax diff locker. That thing would embarrass and leave factory hot rods at the red light. Made it even better that it looked like shit. 3 different primer colors and a rusty roof. I loved it.
4.3 v6 is a really good engine with tons of potential wish there was more performance parts out there for this engine.
The heads are ome of the biggest things holding this engine back. They need good flowing heads to really wake up the engine
Can you configure a setup that fits in a Astro/Safari?
the turbo or blower system can be configured for a chassis-we just do it for the dyno
I myself would love to see some mods on the 4.3 for the Astro/Safari. A lot of comments say throw a 350 at it but easier said than done in a van. I have an AWD and oil pan issues even worse. I would like to see real world mods for us, other,other guy's. Thanks Richard, best channel on YT 😁👍
Been waiting for you to do a 4.3 video. I had a built one in a SWB 2001 silvy that had 400 sleeves in it with aluminum heads and a custom ground cam it had a Mercury marine intake with the external injectors that truck outran a lot of V8 trucks i always wanted to Turbo it . Great Video Richard
Super excited I have a 91 block 96 vortec heads with 280hr cam. This will be interesting
Iv had a few typhoons, they are rocket ships. Love the 4.3L
R.H. ............slow down we need you for winter , BAD MAN !!!!!!!!!!!
I'LL BE HERE
@@richardholdener1727 your videos helped me pick out the parts needed for my 6.0/6.7 LQ4. Sent the 317 heads to TEA for the stage 2 porting, got the FAST LSX RT intake with 90mm Z06 throttle body, tick performance cam 214 int 0.571 lift, 224 ex 0.561 lift, 114 +4 LSA, harland sharp 1.7 roller rockers, comp cams roller lifters...and the spurt of the moment move when I brought the short block to the machine shop...ended up ditching the stock internals entirely and going with a Scat 408 stroker with 10.5-11.0 to 1 compression. Should be done in 8 weeks. I'm thinking 500-550 flywheel hp. What do you think it might have power wise?
@@richardholdener1727 will you please give me some more information about the 4.3 I am a huge fan and this is one of my favorite Chanel's next to high performance academy and project farm and speaking of project farm will you please compare the difference between gas and propane also different types of fuels? Please. I would love to hear back from you soon
@@richardholdener1727 There are a lot of Bowtie 18 degree heads out there. Splayed valve eve, if going wild. www.ebay.com/itm/Chevy-4-3-V6-Bow-tie-Aluminum-Cylinder-Heads-Pair-1X137747-ported-race-drag-st/303733686034?hash=item46b7f03f12:g:V94AAOSwbuFfdg3Z
I had a syclone mine was number 1967 of 3000 made I built the engine ported the heads ran a kenne bell front mount 36lb.hr injectors and a 20g turbocharger i ran mid 11's all day long with a 2,800 stall converter
Who got 0823 I want it alive or dead.
I had 1967 I loved that truck
Love the 4.3! Had one in a 1990 GMC S15, best engine I ever had! 290,000 mi on it when donated it to Rawhide. LOL It did leak oil from ever ware it could leak.
Hey Rich, would love to see a redo after some better valve train installed in those heads, keep up the good work
My first vehicle was a 1993 Chevrolet S10 Blazer Tahoe edition four-wheel drive and a 4.3 vortec under the hood and when I got rid of it it had 200,000 in the still running strong only thing major I had to do was a head gasketthat was a long time ago and I still yearn for a typhoon or cyclone! Maybe one day. Anyways I was ecstatic when I seen you boosted a 4.3 keep em Rollin in
Can't wait to see a bunch of hot Astro vans prowling the streets
check Japan. they love to import the astro van. there's a whole scene
What bout using the mercruiser intake manifold?
I am in the early stages of planning this build... now I can just copy you ☺👍.
I cant wait for more videos on this , I'm going with twin turbos on my 4.3 , and dropping it back in my oldsmobile bravada
How about turbo 3.4 60degree v6? Ever tested those engines?
I would only approve if it's the dohc version from the gran prix gtp. My buddy had one with a five speed, it was a rocket.
I have run and modded the 3.4L Twin Dual cam motors
I would also like to see the LZx V6"s get more love. Alot of potential that is overlooked because it is not mainstream.
What In-line 6 cyl (besides a 2JZ) would make a strong stroker? Smooth torque and lower RPM.
I ask because I’m used to driving a manual transmission and prefer the RPM range of Diesel engines. But without the hassle of diesel.
Most any straight 6 makes good torque. I used to just stuff as big of piston in them as possible and try to get the best flowing head at low rpm avail with big valves and small runners. And would typically make a mule out of any of them. A straight engine naturally balances itself out so I just tryed to make a square bores out of them if poss. Meaning same size bore and stroke assuming rod ratio is decent. That will make make diesel pulling torque usually. 😉
Do the 4.3 vortec heads accept more lift than the 5.7 heads or should they be machined to accept more than .475 lift?
The Eco-tec 4.3 turbo!!!!! I've been debating trying it out.
Me too!
GM should Do it by factory.
I still feel each and every one of your spiritual judo chops.
I believe Speed o motive used to have a 4.3L crate motor. Id like to see this engine on 93 octane only once its sorted out. Comp 280HR cam? Beehive valve springs?
Used to be home of the original stock 4.3 v6 stroker cranks. Offset ground 4.3 cranks. We used to make them at my old speed shop and grind down the cranks to a 2" rod journal and use 350 rods. That place was around a long time. I assume hope it still is.
Love the video love the 4.3 cant wait to see the revisit planning on turboing my 4.3 s10
@Neal Stahl i remote turbo'd mine and the tinkering has been a hella lotta fun so far! what is you set-up?
Seeing that black powder-coated Holley made me think of the 2-bbl Rich has been running on his 292 I-6 build, and it got me thinking: The Chrysler 383- & 400-ci V-8s both came standard with the Holley 2300 500-cfm 2-bbl, so what's wrong with using one [with an adapter] atop a Chevy 4.3L V-6 on a dual-plane square-bore manifold? Yes, I know they came with 4-bbl spread-bore carbs... but if I'm building an efficient, low-revving workhorse, I figure the vacuum signal I'd have with a 500-cfm 2-bbl would be far-better than what any 4-bbl could provide at WOT. Plus: No secondary tuning issues to worry about! ;)
I was happy with the stock 4.3 5speed in my Silverado pick up. Was good in my Sonoma too. Always would have liked the fuel economy with a bit more power though.
Convince me to save all the LS conversion stuff I bought for my G20 van and just throw a turbo on instead 😁
Or do the Ls AND a turbo? G20's are kickass. Getting my ass handed to me at a stoplight by one would be an honor.
You can always find something to LS. I'm in a similar boat. I got everything to 5.7 hemi swap my b1500 but now I wanna just turbo the 318.
If you turbo the 4.3 it will still make 350-400 HP . And be cool!!!
We have Syclone and Typhoon from 1992. As far as engines go, the Buick 3.8 is a much better engine, and setup than the 4.3 that came in the trucks. The 4.3 in that application made insane torque, but as you saw no revs, not a great head.
But the 3.8L had a weak oiling system which was later solved in the 3800. The 4.3L got good heads with the 96+ Vortec engine. Not sure what had the better heads in final form. Was it the Vortec head or the Series III head? Either way neither late model head adapts easily to early engines and their respective blocks and manifolds but there is potential for these compact engines. I honestly like seeing anything obscure being modified and run even if it doesn't lay down huge numbers
Would be nice to see the battle of the 6's, 4.3 V6 vs 292 L6 each equipped with all the "good stuff". Thanks for all the great content.
Love my 02 blazer ZR2 5speed manual , the 4.3 still runs nicely and would eventually love to syclone turbo it eventually 👍
I have a 80s 4.3 I'm trying to restore came out of a van. I got a 4 barrel carbureted intake for it and a holley 600cfm. I have no idea whats gonna happen with it but I really want to put two turbos onto it too. I'm not sure how that'll work with the carbureted setup, I'm really new to a lot of the concepts I'm facing like the fuel system, boost, how your air system will work and won't work in it.
I would love to see a big bang with a Honda J series junkyard engine
yes
That would be cool! The K series is nice and all, but IMO a V6 sounds better than a 4-banger.
Everyone needs to get one other person to subscribe to Richard . this level of quality content from a guy with less then 90000 subs come on guys tell your friends. More views =bigger Richard . lets get Richard to a million subs in a year. Every car guy should be watching this guy
and then they told 2 friends, and they told 2 friends, and so on, and so on......
have you looked at the mercury marine 4.3 MPI intake manifold
I would like to see you do a GMC 351 V6 from the 60s. The 351 could then be compared to the Chevy 350 V8. Some of the cool things about the GMC V6s Are that they have sodium filled exhaust valves, actively oiled camshaft lobe’s, massive blocks and low compression ratio. They should be able to take quite the boost pressure. But my personal reason for wanting these tested is that I have two 702 cubic inch GMC V12s that have several components in common with the 351. But of course there are virtually no aftermarket parts you would have to have the stock Cam reground and make new intake and exhaust manifolds. Making a new intake manifold looks very simple though.
You know... you could donate an engine to him. Lol. I love the 702. I’ve been looking at one sitting at an old tractor shop. Is like to put into an old Cadillac or similar. With boost.
My plan is to make the automotive version of a P 38 fighter plane from World War II. A huge V 12 on each side, a little one man cockpit in between. the 12s will be turbo charge just as the P 38 with 2 water cooled intercoolers mounted inside 2 V6-92 Detroit blower housing in the valleys of each of the V 12s.
@richardholdener did you ever sort out the problems here so we can see the true potential of the 4.3? I can’t find the video if you did.
If you wanted to make it fuel injected you can use the marine intake. You could possibly use the carb marine intake
I had a 4.3 in a 92 GMC truck. It was a great little motor.
The cast iron even fire crank is the weak point on these engines. An odd fire crank is stronger, but probably not the best choice for the street. It looks like the pre vortec intake was used. Edelbrock did make a vortec specific 4bbl intake. The ports in the vortec heads are significantly bigger than the earlier heads, so I suspect the correct intake is also larger than the one you used. Also GM performance made the high rise "Pontiac" Intake ,10093314 and a cross ram also. The cross ram is for raised runner heads.
is the valve train instability on the second test caused by boost (dynamic cylinder and manifold pressure on valves). If everything else was the same (cam, valve train weight, spring pressure, oil pressure /did you loose some to feed the turbo collapsing the lifters a little) do you normally have to add spring pressure with boost.
I have a 4.3 in my 91' Scottsdale. I've been following your 4.3 work and wondered when you might give us a further update? Also, what about using an aftermarket TBI system?
Also thanks Richard great video wish it had more spring and cam! 😁
Yeah thats what he said lol
I have a TBI Vortec 4.3 in my garage that I planned to put in a Jeep YJ a few years ago. The previous owner pulled it from his 1500 pickup to install a 6.0 for towing purposes.
I don't know much about 4.3's though, and so I'd appreciate any info that would help me determine exactly what I have, especially the year it was made.
I've since sold my Jeep, so I don't need the engine now, but I'm considering keeping it for a future project.
I was a Typhoon owner for a while and given the choice between another one and a GN/T Type/TTA I would go 3.8 all day. To make any power you almost have to 4L80 swap a SyTy which is over 5k alone.
Use a monster 700r4 transmission
@@richardbristow14 If I still had it I'd LS swap it. But they're so limited in production numbers that getting parts is impossible. So instead of LS swapping a one of 2500 Typhoon I sold it and got a 4 door Trailblazer that's much newer, more common and the amount of power it makes cost 1/3 of making it with a 4.3. Besides a Grand National is the car that I first saw when I saw a 3 or 4 that kicked off my automotive obsession. It just sucks I was unable to pay the $27k for a 100% stock GNX #545 in 2001 when I saw it in Reynolds GA. Of the 547 made GM kept 547, 546 was wrecked making it the supposedly the last one made, registered and in private hands.
Art Car did some 200r4 that hold up too a lot horsepower on the GN!
@@davidcallahan5157 Absolutely several trips to Bowling Green and several friends with low 9 second to low 11 second Buicks still running a heavily modified 200r4 and stock rear end.
@@richardbristow14 You have got to be kidding... I build these for a living, and Monster stuff is not at all what you want here...
Very interested to see what this does when u get it right, Richard Holdener style! Lol
What I'm going with in my truck is a tall deck 427 with some Brodix Dragonslayer 320 heads, and a Comp Cams 268H, the one with over .5 lift. I know everyone will say I don't have enough cam, but that's the way I built it. If I want to make a little more power, all I have to do is a cam change. If I want to make a lot more power, I'll just add a cam and Blower, because you can't beat a BBBC 🤘😁🤘!
Bigblock chevys like a lot of lift on the cam.
My 496 has a 775/748 lift, 280/288@.050 solid roller. I drive it on the street sometimes. It runs extremely well.
@@thereluctantgearhead4544 I'm going to be using the truck to tow a camper to and from shows and camping, I shouldn't need much more than I'm putting out unless I want to have gallons per mile while I'm towing, LOL! I'm building it for longevity.
@@escuelaviejafarms well in that case, you should have used a pair of oval port heads. Them Brodix heads are kinda large for a torque engine. Room to grow tho.
A follow up test or a retest (however you want to look at it) would great. If you are able to do this test all over again, would you be willing to make a video of the components you chose and how you came to that decision?
Is it time for an old ford sohc 4.0 now 😁 let's see an old explorer sohc turbocharged. Keep up the good work bro I never miss a video.
Richard, you should look into big bore 4 cylinders, mainly a 3.7 mercruiser. Aluminum block with what I read a GM bell housing bolt pattern 429/460 big block ford head, pistons and connecting rods. Can pick these motors up for cheap.
i like the BBF head motor
Richard Holdener imagine the torque that could be made on that 4cyl with Boooost Hahahaha
inline fan i am man here get you a chevy inline dohc 4.2l..///and on the ///4.3l hack speedmaster sbc efi down draft i guess..nice videoA+++
The Brodix intake will only work with the head that it was design for. 23Degree or 18 degree intake port location is quiet a bit higher. When you go to that combo your gonna need some exotic valve train parts only made for those heads are required. I have built both the 12 degree and 18 degree versions and went with the odd fire crankshaft on the 18 degree version. As this becomes the limit in making power since split journal is limited to the 500 hp mark not to mention the rods. The next obstacle on the !8 degree would be finding a distributor ,as MSD no longer produces one. So even if your running a Carb you can get programable ignition and make a crank trigger. My 18 degree version is in progress now . As cam cores are not available for the firing order, I have found old busch series naturally aspirated cams. And that RPM range is way up there. So no streetable idle and also limits the power adders to small shots of nitrous even tho my intention was to build a multi-stage system with a 400 shot. oh well NA and A150 shot is the way I have to go and see what happens. Oh also the 18degree is 305.081 CID.
I would love to see the LV3 tested. What about it?
Finally! Iv been waiting for this one. Roadkill strapped a damn DIESEL TURBO! On it and made it look like junk with no potential. Like it's not literally 3/4 of a 350
weird pitch but can we see some of these run with propane mixers? the 110 octane rating and natural evaporative cooling seems promising.
What would you do to a stock 2015 4.3 for a street truck build?
not sure i could afford one
Richard Holdener I’m going to look at one this weekend all stock 83k miles shortbed regular cab 2wd not sure how to go about getting more power down the road wasn’t sure if I should go with a turbo or supercharger or just cam it or if you had any other suggestions
I didn’t realize how much the 4.3 looks like a SB V8. I just had something different in my mind. Not that it would make a difference but is it or can it be as as durable as a regular V8 with forged components? Are they available for a 4.3 v6?
forged pistons and rods are
Hey there jus watching thru the end of the video and if you can wiggle another test of the old 4.3 maybe with a stock cam and try the 1.6 ratio rockers in place of adding camshaft. How does more rocker affect power curves in stock trim engines? I have a very stock engine both in my current truck and on a stand in the backyard and preparing for turbo application i plan to file the rings for more gap, self port the intake and heads, have ebay cheapo headers that need a little bashing in to clear spark plugs but all in all your info and numbers have me thinking i am going a lil far for my needs as i dont think i want to run more than 8 psi until exta funds for v8 swap come available. The motor was cheap to buy itself and instead of a cam i am thinking keep the power curves it does make for more low end torque 2800 and if larger rockers give a lil extra umph then that plus boost = happy truck engine numbers!! If ya were closer to AZ id volunteer a dyno mule or motor to see what they do!! Happy friday to ya and keep the horsepower screaming!!
I would love to see LU3 4.3L V6 boosted...
How about doing a test on the regular 5.2 Chrysler F I motor to a newer tunable ecu. Will or can they make more power.
we use Holley
What about a episode on what spark plug makes the most power 5.3 ( iridium copper core double Platinum) different brands possibly to see if e3 really makes the power that they claim and what timing / compression is most effective for those plugs
plugs don't make a difference
When are you going to revisit this motor?
IT WASN'T MINE
LOVE IT .LOVE YOUR VIDEOS..THANKS!!!
Now do the balance shaft engine with CSPI so I know what I need to do correctly since mines already heavily built lol
I remember the high output 4.3 vortec motors were advertised as making 300 hp out of the factory. I was impressed cuz most cars were weak at the time.
Not sure if you are thinking about a crate motor? Because even the Vortec 350 was never rated at 300hp.