Vacuum leak was obvious. I figured it popped epoxy, but wild that it actually pulled aluminum out. I worked at Batten in the P/S Truck era, and one day, John Lingenfelter brought a pair of heads in a suitcase for some flow bench/ swirl meter testing. That class was cool.
Been really curious about this engine, from what I remember about the pro stock trucks they ran the oddball short deck height bow tie block with the Olds Aurora bell housing. I’m assuming that this little monster is one of those engines, if that’s the case they could be milled down to around an 8.200” deck height. I do remember that they raised the cam tunnel by .391” for better pushrod angle and shorter pushrods to eliminate some of the deflection in the pushrods and lightening the valve train. Some of those teams had some really extravagant block lightening programs back then so I can only imagine how sculpted that block is in places that nobody would see. That’s definitely a cool piece you’re working with there. Looked for one of those castings for quite a long time but finally gave up and bought a Merlin IV and went big block big inch but still keep a watch out for one of those. Y’all are still doing an awesome job with the channel and congrats on the new machinery over the past few months. 👍
Continuing the Small Block Chevrolet's excellence. First year of production 1955. Continued development because of the open aftermarket industry and the quality of the original design. I love Pontiac V8's, Mopar RB and B big blocks, even the Mopar LA, but i hold high regards for the SBC.
It’s a sweet engine for sure, but sprint cars push that number all the time and have to last 30-50 laps at 8,500+ highs (sometimes buzzing over 9,000). Then they last 6, 10, 20, sometimes 30+ races at that. I didn’t catch what fuel he’s using in this, but sprint cars are mechanical fuel injected methanol.
Steve, if you do another video on this little beast could you show the modifications more extensively on the cylinder heads? Anything that was done by hand would be awesome to see. THAT is a true hot rod engine!
Why people (like myself) fell in love with small blocks 👍🏻👍🏻👍🏻👍🏻! 2.5 hp per cube is also pretty awesome for something that old! New stuff is so much better! Aussie pro stock is right at 3hp per cube @ 398 cube! 400 cube small block rule over there! Tractor/ Truckpull is one of the hardest things on an engine! Wide open for 15secs + & yanking them backwards 😳😳😳😳!
I remember a lot of guy's who ran Pro Stock Truck were not happy when NHRA dropped the class after only a short period of time because of all the time money and testing they put into the class.
Those engines were originally 358 cu inches(4.185 bore x 3.25 stroke was the common sbc build) as the rule book capped them there. I hadn't ever seen a set of sb2's worked over like that with the epoxy. I know in the 80's that was common, but not so much in the 90's. I know back in those days the heads were sold by GM in roughed out form and it was up to the finisher to put the runners, guides, & seats in them.
Now that you remind me I had a similar thing happen to me when I had some porting on an old Harley. It was ported a bit too much and developed a pinhole in the top of the intake port into the rocker area.
I knew what the problem was because I had the same problem around 2010 or so with the 406 sbc in my 79 C20 truck. An old guy in Orange County, CA who used to do work on nascar engines did the porting on the Edelbrock performer heads and intake. I told him it was a daily driver for work, towing, etc and that I wanted as much reliable torque as possible. The epoxy worked but the thrust bearing on the crank got wiped out and the trans also damaged after I pulled a long grade. My uncle had built the trans and did many for race cars and trucks used for towing. The engine builder didn't use the right bearings for the scatt cast crank. A different engine shop rebuilt it but we went with a forged and blueprinted crank and full roller valvetrain. They hot tanked the heads and used them again. The engine burned oil and at 5k miles I pulled it. The intake runners were full of epoxy and I could flex the runner walls with my finger......yep beer can thin where he didn't go through. The epoxy started to fail. It was so thin in so many places that we scrapped the heads and I bought new bare heads and had them blended and the oversize valves put back in. It ran much better and the hydraulic roller cam had much better throttle response. We were only shooting for 525 tq and maybe 400hp with massaged smog legal parts. The goal was to have an engine to go well over 100k miles and to pull grades at 3500-4500 rpm for up to 40 minutes at a time if needed. There are some big grades in Ca. (Cajon pass and sherwin grade) Nothing crazy but making the most of a truck I sunk a ton of money in and built everything with very good parts for a sbc, so going LS just wasn't really an option.
Steve , when you described the problem , the first thing I thought of was vacuum leak, I didn’t realize the intake runners was inside the valve cover & part of the head . Anyway it made thought process was correct . Great video , enjoy learning more in & outs of competition motors. 👍
They port the heads to the point of blowing through the walls into the push rods, so they machine them and installed a metal tube that gets epoxyed in to place, Mopar guys do it all the time
I remember using those spark plug index shims, On one of the motors I built for my Fiat Topolino Altar. Was having same trouble piston hiting the plugs. I still have alot of stuff . I even had a cam that Jerry Hulse had one of a kind.
When I ocassionally run into intake leaks, I just beat the vent tubes into the main carb body thus shutting the bowl ventilation off will richen the mixture. The engine then will pull a steady stream of fuel, no flux cap required... just a two pound sledge. Sometimes I have to lean the jetting one step to burn the additional oil and to compensate for some additional fuel with the modification. Just a little Pep Boys 101.
I'm surprised you don't always index the plugs regardless. I remember seeing the magic marker lines on the porcelain on late model stock car engines at Langley Speedway in Hampton ,Va.
Thank you Steve I've learned so much from your videos. I spend 30 minutes to an hour most evenings after work watching your videos. Would it be possible to show us some of Kyle's car engine and chassis set up. Again thank you Mr. Morris for all the time you spend making these videos.
very nice small block!, guessed the intake leak issue but got pipped at the post!, clevor fords often need plugs indexed for same reason, crooked valve heads are where its at!!
I'm pretty happy. I guessed it was ported to the limit since it was an old school engine. I figured it cracked or had a failed patch since the old guys liked porting through and then fixing the hole after. My comment said crack so I guess I was close but not quite. Probably should've figured epoxy since it's aluminum, I even have a couple motorcycle heads that have ports patched with epoxy. Seeing Iron heads ported paper thin with brass brazed to patch it together again is pretty neat.
There was a few little little drips💧 on the first pull. It looked like the return on the dry sump. But it came from the ds head at the AN fitting. I thought it was only one but there’s a few. The lower one on the front cover, not the vent.
Forgot, you used to be able to get different thickness crush washers and, I think, special tapered washers for taper seal 'plugs. With the stock 14mm 'plugs, which use a 1.25mm pitch, that means 50 thou' equals 360 degrees, 10 thou' equals 72 degrees, etc.
I was thinking it had to be pulling vacuum from somewhere but honestly couldn't think from where you already checked the obvious, never thought the negative pressure would pull epoxy let alone aluminum, even at my age you can learn something new and with my memory that's almost every day LOL
Only thing from first video that didn’t give info on was engine smoked on restart I assumed it was Rich smoke if you would have said oil yup leaks like you found had those in the 70’s running F/MP and other classes where we ground the crap out of push rods CSA haaa glad you found it and something like this makes us all nuts after years of going along singing a song haaa😂
I didn't realize the ports were paper thin and orr epoxied, but should have thought of it based on how you said the engine was radically altered. We all knew it was in the heads or intake. Just needed to smoke test to find the leak or a close-up visual.
I figured that is what was happening. I restore vintage race engines (usually old Italian and English v12s) and have encountered this porosity problem often in old castings. Especially magnesium... 😂 .
Hello there. I hope you see this Mr Morrison. How would a wastegate for a turbo or supercharger work can you set up like that except install backwards so instead of losing pressure on the outside it loses pressure in the manifold for that split-second you may need to come down so you don't burn holes and things. Just a thought let me know
I was involved in building an engine similar to this in 2012/2013. Pro stock truck heads, rodek block, etc… it was a screamer with a little bit of nitrous. Engine ended up getting sold to a guy in Memphis I believe. Good times
@jasonlucas9991 if tq was the number one objective then everyone would be running diesels. I'm sure wheel speed and gearing plays a big factor in tractor pulling just as much as tq
You should install an ajustable vaccuum peak venting valve under the carb to prevent the intake plenum from sustaining too much vaccuum. ( i don’t know if it even exist lol ) . Also i like your indexing spark plugs explanation, they even sell different thickness spark plug washers so you can torque them and still be able to have them clocked properly. I like your informative videos.
that would be like a "deceleration valve", that was used on factory street cars. but that just makes it go very lean and that's never good on an very high compression engine like that, it would rattle and hammer itself to death quickly, not shut off, melt plugs & valves, break rings, piston lands, who knows what else. bad idea times infinity :)
Hey, when we found holes in the intakes when I was racing, it was because the piston exploded and broke the rod which took out the pushrods and scattered parts all over the track. We didn't have any holes on purpose there. Not fair.
I wonder given the application. If its worth trying to advance the cam, add dropped carb venturie extentions and maybe a plenum stuffer in the center to remove a little plenum volume and try it again. Maybe you can trade for some torque?
Ohh BTW, The Heads look like the old SHORT reach plugs not the long reach like you used. Maybe camera angle made it look that way but i remember the short reach plugs
It would be cool if Steve Morris Engines CNC'd an LS style head that was direct bolt-on to older small block chevy engines. Headers could be direct bolt-on, but the intake manifold with distributor/dist. delete would need to be figured out.
2.48 HP/CI is impressive, indicative of what it would take to be competitive in class racing. (Hated NHRA for killing PST) Personally, I've found that a yellowed porcelain (running VP leaded fuel) is an indication of being lean, meaning the coloration would start to show up after leaning out.
No, instead of continuously accelerating like in drag racing, as more load is being applied in tractor pulling, it’s pulling the engine RPM down. That’s what he’s referring to.
There really is outside pressure, at 14 .7 lbs.per square inch against our body ..air pressure ,thats why we need pressureized space suits and pressureized air plane cabins because the air pressure is less with higher altitides. Dont feel bad, most people forget this !
Even though it’s not a flux capacitor, it would be interesting to know what is the energy storage capacity of the fuel being used on a specific engine like the SMX and how much would that equate to and watch? Asking for a friend
I remember an IHRA class in the 90s that ran N/A small blocks with old pro stock chassis called factory mod. Screaming small displacement engines running 8.90 s maybe faster. My friends dad ran an old WJ car . Good times
I am wondering why the exhaust ports are not spaced like the typical SBC where the inboard port are next to each other? They appear to be spaced evenly?
I raced big port 426's. They all had tubes. They handled big boost and explosions without failure. Were those pushrod tubes had from chewing gum wrappers? :) Looking at your plugs and coming from an alky background, my faint memory recalls that the plugs would be clean in a sealed up engine but we looked at how many threads of plating were burnt off. I haven't thought about that for 30 years, for real not make believe. :) That engine was right at 2.48 hp per cube. What does a current na engine do?
So you have to move the piston down just to remove or install a plug?? And what use crush rings to index them properly, I never looked, but I would not think the strap is indexed to the threads in manufacturing? So luck of draw?, or you need to add or remove material to index them?
So from an industrial not racing point of view.....Does the dry sump pump really need to spin at crank rpm? Seems like spinning a hydraulic pump at that rpm would contribute to whipping air into the oil, and take more HP to run. How many gallons per minute does the engine actually need? Could the pump spin slower? Could the pump gears be larger but spin the pump slower for less parasitic drag? Just curious questions.
7:04 Is that water leaking or dripping off of the right bottom side of the engine? 10:44 That is the most impressive spark plug holder I have ever seen
Is this a canted valve head for the small block? Or a big block destroked to 376 CID? I was not aware of these heads for an SBC in the Pro Stock truck era.
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
Dual quad carbs have built in spark plug holders! 😁👍
Vacuum leak was obvious. I figured it popped epoxy, but wild that it actually pulled aluminum out. I worked at Batten in the P/S Truck era, and one day, John Lingenfelter brought a pair of heads in a suitcase for some flow bench/ swirl meter testing. That class was cool.
One has to wonder where the epoxy and aluminum bits went. Oh wait, they embedded themselves into the valve contact surfaces 😬
Been really curious about this engine, from what I remember about the pro stock trucks they ran the oddball short deck height bow tie block with the Olds Aurora bell housing. I’m assuming that this little monster is one of those engines, if that’s the case they could be milled down to around an 8.200” deck height. I do remember that they raised the cam tunnel by .391” for better pushrod angle and shorter pushrods to eliminate some of the deflection in the pushrods and lightening the valve train. Some of those teams had some really extravagant block lightening programs back then so I can only imagine how sculpted that block is in places that nobody would see. That’s definitely a cool piece you’re working with there.
Looked for one of those castings for quite a long time but finally gave up and bought a Merlin IV and went big block big inch but still keep a watch out for one of those. Y’all are still doing an awesome job with the channel and congrats on the new machinery over the past few months. 👍
Close to 1000hp for an NA SMALL BLOCK. WOW💪
Continuing the Small Block Chevrolet's excellence. First year of production 1955. Continued development because of the open aftermarket industry and the quality of the original design. I love Pontiac V8's, Mopar RB and B big blocks, even the Mopar LA, but i hold high regards for the SBC.
Check out Brett Miller, dam near every one of his w9 /w8 headed monsters make well north of 1000hp
It’s a sweet engine for sure, but sprint cars push that number all the time and have to last 30-50 laps at 8,500+ highs (sometimes buzzing over 9,000). Then they last 6, 10, 20, sometimes 30+ races at that. I didn’t catch what fuel he’s using in this, but sprint cars are mechanical fuel injected methanol.
Methanol does a lot for a healthy breathing engine cleaters had 600whp out a stock 5.3 lol
Call it what you want but I'm putting money on it's a big block, just look at it
Steve, if you do another video on this little beast could you show the modifications more extensively on the cylinder heads? Anything that was done by hand would be awesome to see. THAT is a true hot rod engine!
agreed!
it would be easier to find and show small areas that were NOT touched and hand modified. 😉
Why people (like myself) fell in love with small blocks 👍🏻👍🏻👍🏻👍🏻! 2.5 hp per cube is also pretty awesome for something that old! New stuff is so much better! Aussie pro stock is right at 3hp per cube @ 398 cube! 400 cube small block rule over there! Tractor/ Truckpull is one of the hardest things on an engine! Wide open for 15secs + & yanking them backwards 😳😳😳😳!
That’s a big block isn’t it?
never thought of using a carb booster as a sparkplug holder. thats using yer noodle!
That's one fancy annular spark plug inspection rack you've got there, bet it even has a lever operated solvent wash function :)
Love the Orwell quote on the dyno room window: All animals are equal, but some are more equal than others.
I remember a lot of guy's who ran Pro Stock Truck were not happy when NHRA dropped the class after only a short period of time because of all the time money and testing they put into the class.
NHRA was seldom the racer's friend. Long time racer's have many stories.
and exactly why the Bradenton event last weekend was so popular no NHRA involvement@@wfoguy
No Happy Racers Association@@wfoguy
Those engines were originally 358 cu inches(4.185 bore x 3.25 stroke was the common sbc build) as the rule book capped them there. I hadn't ever seen a set of sb2's worked over like that with the epoxy. I know in the 80's that was common, but not so much in the 90's. I know back in those days the heads were sold by GM in roughed out form and it was up to the finisher to put the runners, guides, & seats in them.
You are right. I learn something most Everytime I watch a video. Thank you!
Hahaha , not the Flux capacitor lol Thanks Steve for all the knowledge and amazing content! Cheers!!!
Now that you remind me I had a similar thing happen to me when I had some porting on an old Harley. It was ported a bit too much and developed a pinhole in the top of the intake port into the rocker area.
I knew what the problem was because I had the same problem around 2010 or so with the 406 sbc in my 79 C20 truck. An old guy in Orange County, CA who used to do work on nascar engines did the porting on the Edelbrock performer heads and intake. I told him it was a daily driver for work, towing, etc and that I wanted as much reliable torque as possible. The epoxy worked but the thrust bearing on the crank got wiped out and the trans also damaged after I pulled a long grade. My uncle had built the trans and did many for race cars and trucks used for towing. The engine builder didn't use the right bearings for the scatt cast crank. A different engine shop rebuilt it but we went with a forged and blueprinted crank and full roller valvetrain. They hot tanked the heads and used them again. The engine burned oil and at 5k miles I pulled it. The intake runners were full of epoxy and I could flex the runner walls with my finger......yep beer can thin where he didn't go through. The epoxy started to fail. It was so thin in so many places that we scrapped the heads and I bought new bare heads and had them blended and the oversize valves put back in. It ran much better and the hydraulic roller cam had much better throttle response. We were only shooting for 525 tq and maybe 400hp with massaged smog legal parts. The goal was to have an engine to go well over 100k miles and to pull grades at 3500-4500 rpm for up to 40 minutes at a time if needed. There are some big grades in Ca. (Cajon pass and sherwin grade) Nothing crazy but making the most of a truck I sunk a ton of money in and built everything with very good parts for a sbc, so going LS just wasn't really an option.
Steve , when you described the problem , the first thing I thought of was vacuum leak, I didn’t realize the intake runners was inside the valve cover & part of the head . Anyway it made thought process was correct . Great video , enjoy learning more in & outs of competition motors. 👍
They port the heads to the point of blowing through the walls into the push rods, so they machine them and installed a metal tube that gets epoxyed in to place, Mopar guys do it all the time
I remember using those spark plug index shims, On one of the motors I built for my Fiat Topolino Altar. Was having same trouble piston hiting the plugs. I still have alot of stuff . I even had a cam that Jerry Hulse had one of a kind.
When I ocassionally run into intake leaks, I just beat the vent tubes into the main carb body thus shutting the bowl ventilation off will richen the mixture. The engine then will pull a steady stream of fuel, no flux cap required... just a two pound sledge. Sometimes I have to lean the jetting one step to burn the additional oil and to compensate for some additional fuel with the modification. Just a little Pep Boys 101.
Dang that engine sounds beautiful up there over 8000 rpm. Reminds me of the SB2 days of Nascar
Listen to the Ford in the next video 😁
Old school Pro stock tech baby!! Love it.🤘
I'm surprised you don't always index the plugs regardless. I remember seeing the magic marker lines on the porcelain on late model stock car engines at Langley Speedway in Hampton ,Va.
It's useless unless you need the clearance
Interesting , and good info about years ago and how they did things. Many thanks.
Man that motor is a screamer!
I love the sound of that much rpm. It would be great to get a clip of it pulling after it gets installed.
Keep up the amazing work man! Love what you’ve done Cleetus McFarland and his channel!
That small block is remembering all those things done in the 1970’s era and helping your memory down memory lane
Love to learn... Thanks again Steve for sharing your Time and Tech with us all ..
Thank you Steve I've learned so much from your videos. I spend 30 minutes to an hour most evenings after work watching your videos. Would it be possible to show us some of Kyle's car engine and chassis set up. Again thank you Mr. Morris for all the time you spend making these videos.
very nice small block!, guessed the intake leak issue but got pipped at the post!, clevor fords often need plugs indexed for same reason, crooked valve heads are where its at!!
I had the same motor was a beast was like 750hp on engine then another 500 spraying the ever living bejesus out of it thanks Steve!
I really like those custom spark plug holders you put on the intake. That's pretty neat
For your spark plug problem you needed a AC DELCO R45 or NGK 3522 Plug number if i am correct. They are the short reach plugs GM used back in the day
I had copper pushrod tubes that the epoxy failed in a old set of Canfield heads. I used JB weld and never had an issue again
I'm pretty happy. I guessed it was ported to the limit since it was an old school engine. I figured it cracked or had a failed patch since the old guys liked porting through and then fixing the hole after. My comment said crack so I guess I was close but not quite. Probably should've figured epoxy since it's aluminum, I even have a couple motorcycle heads that have ports patched with epoxy. Seeing Iron heads ported paper thin with brass brazed to patch it together again is pretty neat.
I haven't seen the Made 4 You plug wire and hose separators in a while. My wife worked for Made 4 You and we put thousands of those sets together.
There was a few little little drips💧 on the first pull. It looked like the return on the dry sump. But it came from the ds head at the AN fitting. I thought it was only one but there’s a few. The lower one on the front cover, not the vent.
Almost 2.5hp/cubic inch. That’s some pretty stout power naturally aspirated. Impressive.😳
Forgot, you used to be able to get different thickness crush washers and, I think, special tapered washers for taper seal 'plugs.
With the stock 14mm 'plugs, which use a 1.25mm pitch, that means 50 thou' equals 360 degrees, 10 thou' equals 72 degrees, etc.
I was thinking it had to be pulling vacuum from somewhere but honestly couldn't think from where you already checked the obvious, never thought the negative pressure would pull epoxy let alone aluminum, even at my age you can learn something new and with my memory that's almost every day LOL
Only thing from first video that didn’t give info on was engine smoked on restart I assumed it was Rich smoke if you would have said oil yup leaks like you found had those in the 70’s running F/MP and other classes where we ground the crap out of push rods CSA haaa glad you found it and something like this makes us all nuts after years of going along singing a song haaa😂
900 HP NA SMALL BLOCK , AWSOME!!!!!!!!!!!!!!!!
I didn't realize the ports were paper thin and orr epoxied, but should have thought of it based on how you said the engine was radically altered. We all knew it was in the heads or intake. Just needed to smoke test to find the leak or a close-up visual.
Loved prostock truck. What power were they making in that application?
I figured that is what was happening.
I restore vintage race engines (usually old Italian and English v12s) and have encountered this porosity problem often in old castings. Especially magnesium... 😂
.
Cool old school power !!
The greatest part is using the booster as a spark plug holder
Hello there. I hope you see this Mr Morrison. How would a wastegate for a turbo or supercharger work can you set up like that except install backwards so instead of losing pressure on the outside it loses pressure in the manifold for that split-second you may need to come down so you don't burn holes and things. Just a thought let me know
I was involved in building an engine similar to this in 2012/2013. Pro stock truck heads, rodek block, etc… it was a screamer with a little bit of nitrous. Engine ended up getting sold to a guy in Memphis I believe. Good times
That’s my dad’s buddies engines, can’t wait to get it back and see it run on the track!
Hi mate,Wouldn't you be chasing bigger tourque numbers for tractor pulls?
@jasonlucas9991 if tq was the number one objective then everyone would be running diesels. I'm sure wheel speed and gearing plays a big factor in tractor pulling just as much as tq
A lot of rules also
makes sense thanks@@dickfitzwelliner2807
Cool as bro love the exotic high strung an content from time to time. Didn't even think about epoxy I was thinking porosity of the casting.
Fun style of vid! I was no where close though it is still good to learn why.
You should install an ajustable vaccuum peak venting valve under the carb to prevent the intake plenum from sustaining too much vaccuum. ( i don’t know if it even exist lol ) . Also i like your indexing spark plugs explanation, they even sell different thickness spark plug washers so you can torque them and still be able to have them clocked properly. I like your informative videos.
that would be like a "deceleration valve", that was used on factory street cars. but that just makes it go very lean and that's never good on an very high compression engine like that, it would rattle and hammer itself to death quickly, not shut off, melt plugs & valves, break rings, piston lands, who knows what else. bad idea times infinity :)
The epoxy cracking or breaking crossed my mind, But assumed by the age of these motors didn't think the epoxy aged that much to be breaking down
Hey, when we found holes in the intakes when I was racing, it was because the piston exploded and broke the rod which took out the pushrods and scattered parts all over the track. We didn't have any holes on purpose there. Not fair.
Didn't see Dewey, lol. Thanks for the video. You guys rock!
I wonder given the application. If its worth trying to advance the cam, add dropped carb venturie extentions and maybe a plenum stuffer in the center to remove a little plenum volume and try it again. Maybe you can trade for some torque?
Do you have the oil pressure box checked for all of your dyno pulls for the customer engines?
It is probably just the paint or an optical illusion, but the crank bolt and the small fuel pump pulley look like they are not centered. 6:30
Unbelievable problem! Good on you Steve!👍👍
Ohh BTW, The Heads look like the old SHORT reach plugs not the long reach like you used. Maybe camera angle made it look that way but i remember the short reach plugs
On my scca vw 14:1 motor i had to index spark pulgs. I really need to get back to some racing again.
Getting it rich and safe is good it'll make the torgue that way and keep things from detonation under load with the right fuel
I like old school racing motors. It shows a lot of work to make power.
Its amazing how many hours were spent on these Era engines
It would be cool if Steve Morris Engines CNC'd an LS style head that was direct bolt-on to older small block chevy engines. Headers could be direct bolt-on, but the intake manifold with distributor/dist. delete would need to be figured out.
world makes a gen 1 block that accepts LS top end
sure makes me appreciated modern horsepower tech.... sadly i would update the heads and intake
it's hard to remember all of the "old tricks" after working, and improving modern engine for the past 20+ years...
2.48 HP/CI is impressive, indicative of what it would take to be competitive in class racing. (Hated NHRA for killing PST) Personally, I've found that a yellowed porcelain (running VP leaded fuel) is an indication of being lean, meaning the coloration would start to show up after leaning out.
Thanks for the follow up, was interesting trying to guess!
All the old school ghetto ass weld and chopped up shit. I love it 😂😂😂haha
How is a lean condition related to "pulling backwards"? @9:25 Steve mentions that the engine may physically rotate backwards? Is this "dieseling"?
No, instead of continuously accelerating like in drag racing, as more load is being applied in tractor pulling, it’s pulling the engine RPM down. That’s what he’s referring to.
My guess was the epoxy in the intake runners came loose but I didn’t answer the why I guess.
There really is outside pressure, at 14 .7 lbs.per square inch against our body ..air pressure ,thats why we need pressureized space suits and pressureized air plane cabins because the air pressure is less with higher altitides. Dont feel bad, most people forget this !
You are an engine doctor thank you my friend you rock .
Even though it’s not a flux capacitor, it would be interesting to know what is the energy storage capacity of the fuel being used on a specific engine like the SMX and how much would that equate to and watch? Asking for a friend
Thank you for knowledge
I remember an IHRA class in the 90s that ran N/A small blocks with old pro stock chassis called factory mod. Screaming small displacement engines running 8.90 s maybe faster. My friends dad ran an old WJ car . Good times
I am wondering why the exhaust ports are not spaced like the typical SBC where the inboard port are next to each other? They appear to be spaced evenly?
Love the old skool engines❤
Hey Steve. Love the videos. What kinda alien head flow and crazy cam timing is required the make 900hp out of 376”s?? This is mind boggling 😂
How are those sb heada look like bb heads, exhaust ports canted valve
LITTLE CHIEF HEADS ..?
I'm new to your channel and yup you're right watching your videos a feller just might learn somethin! Love the channel, keep it up!
I raced big port 426's. They all had tubes. They handled big boost and explosions without failure. Were those pushrod tubes had from chewing gum wrappers? :) Looking at your plugs and coming from an alky background, my faint memory recalls that the plugs would be clean in a sealed up engine but we looked at how many threads of plating were burnt off. I haven't thought about that for 30 years, for real not make believe. :) That engine was right at 2.48 hp per cube. What does a current na engine do?
376 NA old school smallblock and over 900hp.... yeh... that is nice engine😅 what a beast
So you have to move the piston down just to remove or install a plug?? And what use crush rings to index them properly, I never looked, but I would not think the strap is indexed to the threads in manufacturing? So luck of draw?, or you need to add or remove material to index them?
It was making 2.5HP per cubic inch! really good.
I GUESS I'M JUST OLD FASHIONED ..LOVE THESE TYPE OF SBC'S
I like your spark plug holder...
So from an industrial not racing point of view.....Does the dry sump pump really need to spin at crank rpm? Seems like spinning a hydraulic pump at that rpm would contribute to whipping air into the oil, and take more HP to run. How many gallons per minute does the engine actually need? Could the pump spin slower? Could the pump gears be larger but spin the pump slower for less parasitic drag? Just curious questions.
When intake ports are so ported they have to use epoxy to fill the holes😄
how much horsepower did the Pro Stock truck engines make? I'm curious since you said this engine's power isn't even close.
This was a fun video! Thanks!
7:04 Is that water leaking or dripping off of the right bottom side of the engine?
10:44 That is the most impressive spark plug holder I have ever seen
Your looking at a VERY RARE set of Holley spark plug holders.approved.
Thanks Steve.
He needs to make a shirt with his hand giving us the dyno HP trace 😂
How do you index spark plugs, do you just keep tightening until your line on the porcelain is facing the sky?
Great content thanks for sharing
I reckon ur smx would almost be pumping out 1.21 jiggawatts, that thing needs a flux capacitor😂 loved the back to the future reference steve!😅
Is this a canted valve head for the small block? Or a big block destroked to 376 CID? I was not aware of these heads for an SBC in the Pro Stock truck era.