JUNKYARD BBC BATTLE-GEN 6 7.4L 454 VS GEN 7 8.1L 496. WHO IS THE LOW-BUCK KING OF BIG BLOCK TORQUE?
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- Опубликовано: 15 окт 2024
- HOW MUCH POWER DOES A CHEAP, LOW-BUCK, JUNKYARD 454 MAKE? HOW MUCH POWER DOES A CHEAP, LOW-BUCK, JUNKYARD 8.1L MAKE? DOES AN 8.1L MAKE MORE LOW-SPEED TORQUE THAN A 7.4L? CAN THE 454 MAKE AS MUCH POWER AS THE 496? HOW MUCH POWER IS A CAM SWAP WORTH ON A 7.4L? WHICH JUNKYARD BIG BLOCK SHOULD I CHOOSE FOR TOWING? CHECK OUT THIS VEIDEO WHERE I COMPARED THE POWER AND TORQUE OUTPUTS OF TWO JUNKYARD BIG BLOCKS-THE GEN-6 7.4L 454 AND THE GEN-7 8.1L 496. I EVEN MODIFIED THE SMALLER 454 TO EQUAL THE POWER OUTPUT OF THE 8.1L, BUT IT STILL DID NOT MAKE AS MUCH LOW-SPEED TORQUE!
Just a quick crunch of the stock numbers:
The 8.1 is 9.25% bigger (more displacement) than the 7.4.
But it made 68 more horsepower which is 19% more than the 454.
I remember when the 8.1 came out. Our plumber got one and it would do block long burnouts with a full pipe rack.
I think the 8.1 is always going to be hindered by its basic cost in used condition and the lack of a broad number of aftermarket parts. And that's a shame because I think there is real potential in the 8.1 as a performance engine, for off road and limited drag racing.
Great work as always Richard !!! To be able to slap a cam shaft in a GEN six. And get approximately 425 hp. And not have to go to the 8 L motor. I think people will be very pleased to stick with their 454s
I wonder how the 8.1 would do vs. the old school 502 GM built for boats, motorhomes, and hot rodders. Not likely to find one in a CAR junkyard, but maybe at a dealership, boat repair, or RV repair shop.
Hi Richard, I want to thank you for the education you have provided since back in the Days of Adding heads and a cam to junkyard motors began. What you taught us all is that as long as the heads will support the air flow the displacement requests it will make about the same torque regardless of the Brand stamp. Pontiac, RB Mopar, Ford SMB or SMB Chevy it doesn't matter, basically Wedge motors all act alike. Adding cam timing just moves that Torque curve until the head runs out of flow. The Canted valve Motors are better and I assume the Hemi heads are better yet because they flow more air but only if the RPM and Cam timing support it. Same can be said for Overhead cam motors, they flow more at any given RMP/Displacement therefore make more power. The 7.4 versus 8.1 is a great example, Bigger, As long as flow is equal to the demand at the RPM you run is always better at the same percentage to Size. Lastly you have explained better than anyone else the relationship between Torque and Horsepower in that Horsepower is just a math problem based on Torque and RPM. Build your engine as big as you can to make torque. If you are limited to small displacement by rules then spin it faster and improve flow. Thanks again.
I have had a 454 of some sort in my life since 1986 up to 1999-2000 and have always been a huge fan of them. I bought a 2001 K2500 8.1 Suburban and was blown away at the low end torque of the 8.1. Raylar engineering makes some great pieces for it but my checkbook says I can't do it ....lol. I would like to see a comparison between the 8.1 and the V10s put out by the two lesser brands as they are both in the 8L range as well.
Ford v10 was only 6.8 liter
Loved my 454's cam and head combo's I could pass anything except the gas stations, always wanted the 496 wondered how that would do. Have you done any tall deck comparisons? I would love to see comparisons on bored and stroked tall deck 427 bumped to 572 i believe it was
You should do a video on what you would do to make the ultimate towing motor out of an 8.1
Hey, thank for making this video. I am really enjoying the education I am getting from you. Looking forward to more 8.1 videos.
I definitely think the 8.1 will be what powers my 65 Travelall. Interested to see the cams and even a set of Raynar heads and what kind of power it can produce. Thanks again!
I was watching some RV drag races and I'm pretty sure I could beat all of them with my 34ft 2002 R-Vision Condor with the 8.1. It's a beast for sure.
Me too.
The 454 needed more lift at the same duration and a 106-110 valve separation, and more compression to equal the 8.1
Really it needs about 35 cubes :p
@@hondatech5000 a Honda guy asking for more cubes? Interesting
@@MrPhukyew I think more cubes is more power just about any way you cut it
@@hondatech5000 No replacement for displacement, agree. But the challenge was to make as much power with the 454 as the 496. Richard didn't try very hard on that one.
Hey Richard, it'll be a pretty cool if you do a comparison between these chevy fuel injected big blocks with Dodge's 488 8.0 V10 from the ram trucks and Fords late fuel injected 460! A real torque monster challenge!
That's a great idea. Stock vs stock. I don't think you'd find a carbed intake for the V-10, and a cam might be hard to find too. So the test would have to be stock vs stock. And a V-10 is not an easy engine to swap.
I believe, based on my butt dyno, that my 96 F-250 460 was quicker and faster than my 98 Silverado 2500 454. But the Ford may have been lighter, or had better gearing.
Awesome comparison.. Seems the engineers at GM have really been on their game for about 20 years for power..
It would be quite cool of Raylar to step up and send you their heads, cam, and intake. The factory heads and intake are quite crappy on the 496 and I think it would be interesting to show the difference between a heads, cam, and intake Vortec 454 and Vortec 496.
I’d like to see a graph comparison between the vortech 5.7 and the 5.3 ls that replaced it, next to the gen VI bbc and 8.1 that replaced it. I think the 8.1 made as big of a jump in power as the 5.3 over its predecessor.
I have a 98 k3500 with the gen-6 454 bought it new I've always wanted to put a set of twin turbos on it. I'd like to see a video on the gen-6 and giving it some boost. Really enjoy your videos awesome content thank you God bless
THERE ARE MANY GEN 6 TURBO VIDS ON THE CHANNEL
Good information
It wouldbe interesting to see a stroked version of the gen 6 454 that say, displaced the same 496 ci. As the gen 7 8.1....is the gen 7 that much more efficient where it would still make more power? Or is it really all about displacement..??
I was thinking the same thing.✌😁
The 8.1 is 9.25% bigger (more displacement) than the 7.4.
But it made 68 more horsepower which is 19% more than the 454.
He’s posted a few stroker BB results. If you’ll look back a year or two, I’ll bet you find your answer.
ruclips.net/video/WEYbshGlucE/видео.html
Is it worth it?
@@MattPratt I see your point...so by the math, it kinda looks that way....it does make sense...
Big question. How much more fuel did you eat to make a little more tq ?? Even with the hot cam- the 454 will get wayyyy better mpg than the 8.1... 8.1 is a pig on fuel mileage.
Interested in the LS 8.1 with cam and stock cylinder head upgrades with CNC ported stock heads with valve springs and a mild upgrade camshaft I'm going to guess 480-500 horsepower at 5000-5200rpm 575-600 foot pounds of torque 3800-4000rpm while still having excellent torque at 2000rpm
I love a lady who knows engines 😉
Sure wished you did some oem bbc closed chamber shoot outs...
Really like your content!!
All years.....
You had 4 different versions of the 8.1 available from GM. I currently own two different ones.
The one I drive daily is the 440 hp motor. I ordered it from gm. Advertised at 440. Slip says it made 452hp, 598 lb ft. I didn't want the 510hp version. I felt it was to unstable for towing. I could see the pistons becoming grenades while traveling up a hill with a full trailer on a hot day. The 440hp motor has been great though.
I have a 380 hp motor that came out of an avalanche. They used the 4L80e or whatever it is instead of the allison. They're ok, and honestly if you're looking for a slick and easy big block replacement for an old big body chevy. This is your go to option imo.
440 rated by GM?
What's not to like? Roller cam, lots of torque, lots of cubes. Only thing lacking is chrome valve covers for a 50 hp boost (cam not needed).lol Thanks for the video. By the way, what do you do with these engines when you get done with them?
KEEP TESTING THEM
I really need to see the video of the heads, intake, and cam mods added to the 496, please, Good Sir? I want to pull the trigger on this motor that I have found, but I really want to see what is available on the aftermarket in order to upgrade and squeeze 700 HP out of it. Even if I need to add a turbo(s), I will go that route. I just want a really mean street beast, that I can have fun with and maybe take to the track from time to time. I am willing to pay for this information, as well. I understand that it's a huge ask, but you are the only guy that I can find who is doing a lot with this motor. Thank you!
8.1 vids are up
You should do the Ford and Dodge V10 (truck and RT10 version would be cool) VS 8.1
Yessir!! The one rule with no exception, "there is no replacement for displacement". Period.
Great video thanks Richard! Next do a big bang 8.1?
WOULD LIKE TO SEE A 400 SBC WITH .525 LIFT CAM, 195 TRICK FLOW HEADS, RPM INTAKE AND A 750 CARB. IM THINKING IT JUST MAKE OVER 500 HP AND 500 TORQUE
I HAD A 400 SBC , LUNATI CAM 525 LIFT, A SET OFF 882 IRON CHEVY HEADS FULLY PORTED VALVES RESIZED TO FIT MANLEY NARROW STEM 2.02/1.60 VALVES, A PORT MATCHED OFFENHAUSER SINGLE PLAIN INTAKE AND 750 EDELBROCK CARB. WAS A BEAST. COULD WALK A 67 CAMARO WITH 427 BBC WITH 4 SPEED
Lots of aftermarket high performance heads available for the Gen VI.
Richard, thanks so much for the BBC content. Is the gen 6 454 factroy efi capable of 450hp with cam heads and tune?. I bet alot of junk yard guys want to know. Thanks again so much love your content.
it can do that easy
Let’s see what that OE intake and EFI CAN DO!
Or compare it to a Holley terminator with rpm air gap.
Keep up the great work!
With all dis being said, would It just be better to go with a 502?😊
.... look avg power production of each, vs cost to put together... carb'd & cam 7.4
I have watched all the videos. The displacement and cylinder heads are what makes it better.
A stroker gen 6 496 will make less power and torque because of the heads and intake
I wish the 8.1 had more aftermarket help. There's like 3 intake options.
Questions... Ge6 STD oval port? Same crank as gen7? If so you know the answer... Big stroke w afr ovals moderate comp. Big torque coming... Keep on testing I'm still watching... Thanks
gen 6 is std oval port
Wow! That is a Lot of torque to give. I would like to see the 8.1 in as much more cam as you can on stock pistons and one of the big two piece single plane intakes since they tend to crossover vrs dual, has been lower and lower as the cubes go up.
Hi Richard Holdener if i use 454 Edelbrock Performer RPM Cylinder Heads 60455 in 496 ist going fit on 496 thank you✌
any bbc head will physically fit
These motors are found in fairly affordable tow rigs would be nice to see a low dollar boosted not Max effort horsepower rig would make at the wheel in real world application
didnt expect numbers like that from the 8.1L, impressive!
454BBC vs 454LS would be a cool comparison.
Am confusion
@@Blackfaced a 454BBC vs a stroked and bored 454ls.
@ryanallen8392 appreciate you explaining bud
2 more questions, Rich: First, is the head bolt pattern for the 8.1 different than the 454, or could you bolt 8.1 heads on a 454? Also, do you think there will ever be an aftermarket carbureted intake for the 8.1? It would be great for an old 1-ton work truck, tow truck, motorhome, etc. I hate electronics and wiring, lol.
there is already a carbureted intake for the 8.1l from Dart-that test is coming soon
Richard is about to slap the sloppy tax on the already pricey 8.1s😂
Like them ol 706 heads? 🤦🏻♂️
If you increased the cam to 211 degrees duration at .050, do you think that 8.1 would still make more low end power than that stock 454 did? I'm talking about power as low as 1500 rpm.
yes
@@richardholdener1727 good deal. I'm replacing my gen 5. It should be at better, even in a 6600 pound truck I hope.
Nice comparison.
just watched your junkyardin how-to video, did you ever pick up a ford 300? would love to see some videos about that, maybe even a big bang? 👀😏
NOT YET
Thanks for another great video Richard. I notice you use the Holley eng mgt systems a lot. I don't have much direct experience with their newer products and was wondering whether this is just because they're what you have on hand or is there some advantage to them over something like HPTuner and an stock ECM?
In the past we had problems with aftermarket systems relying on proprietary sensors that tended to be unreliable and sometimes hard to find in a pinch so we modified the oem systems instead. I'm curious what your thoughts are on the current state of things.
OEM systems are great, but in an engine dyno setting they may have issues with missing sensors, etc. The more modern the ECU, the worse it gets. Additionally, the aftermarket ECUs are real time updating, so no need to shut everything down and spend time flashing the ECU to make changes. They all do basically the same thing, the aftermarket ECUs are just easier to use, have fewer extraneous things to interfere with the tune (emissions checks, traction control, etc.), and more transparent in their operation.
@@ChurchAutoTest Thank you for the response, you made some solid points especially for the dyno environment. Ease of use would definitely be a big boon whenever there is a lot of tuning or modifications but on a typical engine swap once they're in and tuned it should be moot. That's when i worry about things like proprietary sensors and reliability.
Seems like I'll have to give these another look for my next swap.
That’s interesting. Nice motor for a truck application. As mentioned in your live stream last night, I’d LOVE to see a super high revving LS and see what it takes to make it spin 9-10k rpm
go check out Ben at EFI University
Check out the SAM racing 433ci Lsx engine that revs past 9k and makes 1000 hp naturally aspirated. They held the record for fastest naturally aspirated LS Camaro like 10 years ago but not sure if they still hold it. ruclips.net/video/vr_gl2cgl1o/видео.html
Basically, it takes money. Factory engines don't turn that fast. Everybody loves to say, "I had a 327 that revved to 10k". But it didn't. 10k SBC or BBC or LS cost serious money and the parts/technology didn't exist in '66
@@MrScottt28 hell any factory LS is already experiencing valve float past 6k lmao
Project spinal tap 11,230rpm with a 358ci ls7.
I ran an 8.1 with 250,000 miles. It ran great. It was in a Uhaul with an Allison transmission. One of the more impressive engines I have run in a truck.
I'd love to see the new gm 6.6 gasser against these. Same target crowd!
To bad you didn't run the long runner factory manifold on the 7.4 with the cam upgrade. Might have made more torque.
Hi Richard, thank you for the impressive videos. I absolutely love the 8.1L, had one of mine mildly rebuilt for my truck but ran into cam issues after driving it 35k miles. Would love to see the test numbers for my combo with the comp cam and comp valve train that i installed in mine. I think the biggest power restriction on these engines is the intake manifold as it breathes very poorly, does anyone make an aftermarket intake for these engines other than raylar?
we are testing a dart
@@richardholdener1727 hey man Theres is a myth ND it's about back pressure well in my theory the exhaust manifold without down piping just exhaust manifold makes more torque then with out an exhaust manifold. Will u make a video just to show everyone that the exhaust manifold has the back pressure that makes more torque
I have both, and am combining bits of both.
Ninja Edit time for descriptions. It's all okay..we know what year the tall deck 496 is. We love your work and effort, so we Always cut you some slack Mr H. 4 out of 5, 4 stars. And my personal appreciation. Great engines both....
where did I mention year?
@@richardholdener1727 You didn't. I'm a Kiwi, so I had to learn the splits of Gen type from you other love feeds. The old headers and new are different. G5, 6 and 7 are different
Like the 454 and the 502 big-blocks, the 8.1 (RPO L18) is founded on a 9.800-inch-tall deck cylinder block though it deviates from the other two powerplants via a 4.225-inch bore x a 4.370-inch stroke (the 454 and 502 maintain a 4.00-inch stroke).
Yes! Great vid. Thank you.
Did y'all see the cylinder wall delete on I do car's channel?
What about de stroking the 8.1? Stretch it’s legs out and put a bigger cam?
no need to destroke
Hello there. Thank you for making the videos I love the education .. One quick question I'm interested in finding a gen-6 454 just don't know in what kind of truck it comes in and from what year. Can you help me out on the year and what kind of truck I can find it in
1996-99 1 ton and some 3/4 ton
@@richardholdener1727 Thanks u So much.. and keep up the good work
@@richardholdener1727 I found this one in a junkyard it came out of a 97 Chevy Silverado 2500 will this one be a gen-6
Richard ,, thank you for all the great articles,,sir I have 93 peanut port ,, by adding a cam and lifters ,,and 840 carb and turbo ,, what hp may be possible,,, thank you again ,, an Ole fart playing hot rodder again
THE TURBO SIZE DICATES THE HP POTENTIAL
Thank you for your interest in BBC’s. I wish I had one of those 8.1’s, but for now I’m stuck with the gen.VI 454 in my ‘98 one ton. I’d like to see something on an optimized exhaust for both these stock engines, specifically because the exhaust has fallen off of mine and it is time to put something on it. I’ll not be making my own headers, but my understanding is that the real gains are in the proper collector design. I’m probably typical of most dudes into this stuff and capable of removing junky collectors from off the shelf headers and making my own collectors to then weld onto purchased headers.
use shelf headers
@@richardholdener1727 Well, this makes it easy, thank you. Is the lack of meaningful valve overlap the main reason for this engine being ‘exhaust tuning’ insensitive?
Com-On Richard, the 496 has symmetrical port heads compared to the regular small port or peanut heads in the same old BBC Good Port Bad Port situation that is mostly eliminated using symmetrical ports..Now I No a Gen 7 has symmetrical ports, Id look to get engine like that considering it would have a port setup kinda like Big Chief head which IS kinda what Chevy just did with there 1000hp crate engine..How'd they do-it? Using symmetrical ports like a Big Chief is how Chevy did it..I love ur videos Richard😉
the good port bad port is not an issue at this power level and the 454 heads flow well enough to match the 496 power-its displacement
You would know better then me & I do believe what you say, just seems as though having a striaght run to the valve under any conditions still has be advantage over making turns w/a good port bad port situation..I used 427s & 454s forever so I do understand the power u can get out of them But compared to Symmetrical Head 496 & I didt know these Gen 7s had symmetrical heads🥳, Now I Do thanks to you & just told my wife abt 496,,I wondered if we could replace 6.0 in her H2 with 500inchs of BBC? 600Hp+ & 650lbs w/a Under 6000rpm, then add Procharger Or Whipple Screw got be over 900Hp & 850lbs in H2 Hummer, sounds pretty Bad Ass But she is pretty bad ass, her other trucks 7.3 lifted Big F350 PU, Anyway I loved the test..Do these 496 run 4.5 bore w/a 4inch stroke Or do they run 1/4inch arm on crank w/a 4.25bore to make 496? I Always prefer Big Bore w/a shorter stroke..I dumped my small bore long stroke engines & have 4.5 bore w/an 1/8inch arm to com-up with 526..I was thinking maybe I cud throw together a symmetrical port 496 & drop my Blower/Hat rite on top, aft put head studs in But not running any real Blower Speed keep boost down, a cheap engine that wud make around 1800-2000Hp, that long block w/my F11 Fowler Extreme & Carbon Hat on top, got make almost 2000Hp considering same top on 14degree Olds maks over 3000Hp..What do you think Richard? I wish wasnt so dumb Or Id find better spot to write you then here,,Thanks for all ur advice, been really helpful to me🎸😉🐾
What kind of timing does the 8.1 like.. don't seem to be much information online
29
@richardholdener1727 Thanks richard, I'm subbed and watch all your videos, thanks for the information. You have helped the hot rod community burn tires!
Many of you fellows are forgetting, Rich is testing JUNKYARD engines, with stock bottom ends. What a full build stroker 454-to-496 would do vs the 8.1 is irrelevant.
Ok, take two engines that are both 454ci. One has bigger bore, the other longer stroke. Does that have any effect on the power curve?
displacement is key-the other variables are very minor until very high power levels and rpm
@@richardholdener1727, Ok, thank you.
im not really surprised to see this but still kinda am.
the 454 is vortec head based and roller motor. yes theyll never flow for 6-7k rpms but they dont flow bad at those rpm ranges either. they stall. but still flow alright. but where they shine is low end torque. with a good torque cam and a little more compression i think it could come close but i think it really is outclassed by the 496. 500 ft lbs of torque is alot. and the last 454's didnt make shit for power they were dogs. i drive one sometimes and i tell my boss all the time let me hook my truck up it will snatch the trailer out from under that load. mine is only a small block 350 but its vortec based aswell and has a good torque cam from lunati and a low power factory tune and makes over 400 ft lbs of torque. with shortys and an h pipe vs these long tubes and true duals it should be closer to 450 ft lbs. the new trans will be in this spring and the shortys go in with it. maybe i can finally get it tuned and not worry about breaking this trans too. maybe i can break 500 ft lbs after that. this build i did was supposed to be mild and toned back from the 350sbc hot block i got to do the swap in the first place. im not complaining but theres is alot to be had with these last gen vortec small blocks and they just got forgotten about for the new ls motors. ive used both and pulled trailers with both and the ls series doesnt impress me even though the numbers are bigger.
Thanks for doing this comparison! Super Riche for the win.
I still want to see a cammed, Naturally aspirated 8.1.
Where did you get the headers for the gen6 can’t find them anywhere could you give me the brand and part number please. Thanks cap
DYNO HEADERS
Why don't you do one maximizing power on the factory gen 6 with factory efi for us who have to run them in original looking state
all the same things work on the efi version
So the ~10% larger engine makes ~10% more torque. I'm actually surprised that the difference wasn't larger, since the 8.1L has the benefit of many more years of R&D.
IN THE 60'S AND 70'S GUYS WERE MAKING 550 TO 600 HP. NO PROBLEM ON 427'S AND 454'S . ALL IT TOOK WAS A BETTER CAM, A LITTLE PORTING ON A DECENT SET OF HEADS.
8% larger, 12% more torque, so 4% improvement based just on torque numbers
Will the 7.4l with a bigger throttle body and injectors act the sane as adding that carb?
NO, BUT THE EFI SET MAKES SIMILAR POWER TO THE CARB ALREADY
What year L-18? I have a 01 suburban...and it's specs are very different....but it's Strong.
THE ENGINE IS THE SAME-THE TUNE IS DIFFERENT
Need to figure cost of parts in as well. On the fence about buying a gen 6, still seeing if I can get some help buying a bigger engine instead.
What about adding the Cadillac 500 In the comparison
IT MADE A LOT LESS THAN THE 8.1L
@@richardholdener1727 yeah I know it seemed as though when I went back and watch the Cadillac videos after making that comment it did not take much modifications to make the Cadillac motor perform as well as the 8.1. But also they point one is more readily available but it looks like the Cadillac has a little bit more aftermarket support probably not for long though. I would like a torque monster engine could get crazy good fuel mileage and it might be a diesel
That gen6 actually makes decent power stock
The cam you put in the 454 is very close specs to the factory HO 8.1 cam .
If only you put a ho cam in the 8.1 ..
The engine that's rusting up in the corner 😂
No replacement for displacement lol!!!!
Ik u did videos on aluminum aftermarket heads on gen 6 which would you recommend for dally driver purposes
afr 265
Bring the 454 up to about 11.0:1 compression with just pistons and don't do any head mods. Put the long runner intake back on it, put a cam in it matching the 8.1 cam specs, the 454 will beat the 8.1 in average power production.
Then bump the 8.1L up to 11:1 and it'll beat the 454 again, lol.
In stock trim, there's only 0.2 points different in compression between the two... 8.9 for the 454 and 9.1 for the 8.1L
@@dennisperry8579 absolutely correct, 11.x:1 compression on an 8.1 (496) would be a hell of an engine too
@@dennisperry8579 .... did this setup, but I installed better head gaskets with a bump in compression to 9.5:1 & a zz502 cam same beehives.... was a monster with longtubes...
Does the Gen 6 "Vortec" 454 from 96-99(?) require a different CARBURETED intake than a Gen 5? Like how the 350s do?
no sir-the intakes are all the same pattern 4, 5 & 6
No replacement for displacement wins again.
Throw in a 4.25" stroke crank and the 454 is right there with the 8.1
I've been wondering the same thing. Stroke the 454 and use the same heads etc etc.
Rod ratio will be be in the toilet it won't last in the hi load environment the 8.1 was designed for but if your dragging who cares
the gen 6 496 doesn't have the intake offered on the 8.1l
@@richardholdener1727 not sure what you mean... I was thinking it'd be cool to see if a 489/496 Gen 6 with an EFI intake or a carb intake matches the Gen 7 496 with EFI or a carb intake. The basic difference would be the top end. Realistically, it probably wouldn't be worth the effort. I can't imagine a dramatic difference at factory cam spec level
@Richard Holdener just saying that the torque in the 8.1 comes from the 4.375" stroke...
I bet if you ran the gen6 454 with the 496 rotating assembly the power output would very close to the stock 496.
Not really. The top end of the newer motor is simply better. Better heads, coil on plug, better intake... it's more than just an increase in displacement.
It's like comparing the older 350 sbc to the ls* engines- the newer ones are simply better. The old ones can be modified, but then so can the newer ones, and to more benefit using stock heads/rotating parts.
@@Broadpaw_Fox the outputs are actually pretty close. I own both engines.
Stock form the 496 is better. If someone were to build a motor the 454 hands down is the better platform. It has the aftermarket support. A 496 build will cost you through Raylar. If other companies such as AFR/Edelbrock/Brodix supported the 8.1l with aluminum heads, intakes, etc I would go with the 8.1l most likely.
I don't deserve to see stuff this good!
sure you do
Hey Richard can you do a 1975 era 454 stock with boost? I have a 1975 c10 I wanna add boost but I am not sure what I need to do please help. Thank you so much
BLOWER OR TURBO? AND THE JUNKYARD GEN 6 WORKS THE SAME AS YOUR 75
Gt45 turbo. I am being told I can’t do that in stock form. 781 heads and edelbrock air gap rpm intake with 750 eldelbrock carb with xtreme energy 4x4 cam
what springs did you guys use on the 7.4 454 I want to put the same cam in mine
How do u control timing with ls harness on gen 6 engine?? Did u swap spark wires?
we didn't run a ls harness on the gen 6-only on the gen 7. timing is controlled by the Holley HP ECU on both
750 carb please or even 850 for the 454!
for 370 hp?
Even by the math of 100% VE 5100rpm x 454ci ÷ 3456 = 670cfm
The 8.1 has a 75mm TB as well.
@@richardholdener1727 It couldn't hurt to see. GM put 750 and 850 cfm quadrajets on low compression 400's, 454's and 455's. These motors barely made 200 net horsepower.
@@bowhite1293 So why did GM use 750 and 850 cfm quadrajets on low compression 400's, 454's and 455's? I'm talking mid 1970's where they barely had 200 net horsepower. Don't believe me? Go and check. I had many 400's and 455's that had at least 750 cfm carbs from the factory.
how do i adjust the timing? turn the dist type on a Gen6 7.4l from 98 k2500... on older small blocks i would pull the vac adv and use a light... how do i adjust on this motor with the computer controlling all? is there a document or video you can point me too? dist was replaced and i just want to dial it back in.
thanks
NOT SURE ON THE FACTORY ECU-DO A SEARCH
@@richardholdener1727 lol. "Google it" wasn't really what I was looking for. I tried that and I just keep getting info that comes up for a carb SBC or on how to install the distributor. Of which they say start at TDC, or Keep track before you pull it out. None of which is helpful...
are there a set of aluminum heads out there that would fit the gen6 454 with the oem intake manifold?
any rec port will fit (slight but inconsequential mismatch) or any oval port
@@richardholdener1727 copy that, thanks!
I feel like the 454 at 496 cubes would match or be better
What year is the Gen 7? Is it 2001-2006?
might have started in 2000
Be nice if they made distributor access a little easier.
access?
@@richardholdener1727 on the 7.4 when it's in the truck dealing with the small space they left you is annoying when you have big hands.
Still waiting on the cam videos 😂🙏
guys don’t look up bbc battle
😮😅😂
On Google or RUclips?
Anyone know where i can get a performance camshaft kit for an 8.1?
632???
10% more gear for the 454 and it would make the quicker car.
What block for a 69 riviera
SO WHY DOES THE 8.1 JUST MAKE A LITTLE MORE TORQUE, WHEN ITS BIGGER, GOT BETTER HEADS , A ROLLER CAM. AND PROBABLY HIGHER COMPRESSION ?
a little more?
@@richardholdener1727 YES A LITTLE MORE TORQUE, GIVEN THAT THE 8.1 HAS MORE DISPLACEMENT, A ROLLER CAM , PROBABLY A LITTLE MORE COMPRESSION AND BETTER HEADS , IT SHOULD EASILY BEAT THE CAMMED 454 BY 80 TO 100 TORQUE.
@@richardholdener1727 DON'T GET ME WRONG , I LOVE YOUR VIDEOS, I JUST DON'T LIKE EVEFYBODY SAYING SOMEGHING IS BETTER WHEN THE 2 AREN'T EQUAL. EVERYONE BRAGS ABOUT THE LS ENGINES , TAKE A SBC , GIVE IT HEADS THAT FLOW THE SAME, SAME COMPRESSION, SIMILAR CAMSHAFT AND THE SBC IS RIGHT THERE WITH THE LS . AND ITS 50 PLUS YEARS OLD !
@@daviddavids3468 480 to 550 equals 70 more foot pounds of torque is not even close
@@gloriamaletta8667 REALLY YOU THINK 70 FOOT POUNDS OF TORQUE IS A BIG DEAL ? THE 496 IS BIGGER, GOT A ROLLER CAM, BETTER HEADS, BETTER INTAKE AND MORE COMPRESSION.
I so want to see 1000ft lbs from that 8.1L 🙂