High RPM Small Block Chevy Power! Only 376 Cu In

[timlarson]

Dual quad carbs have built in spark plug holders! 😁👍

[thegdfp]

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.

[GidDree]

Close to 1000hp for an NA SMALL BLOCK. WOW💪

[GoatPilot]

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!

[leftyo]

never thought of using a carb booster as a sparkplug holder. thats using yer noodle!

[lewismocaby]

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. 👍

[mfree]

That's one fancy annular spark plug inspection rack you've got there, bet it even has a lever operated solvent wash function :)

[brianholcomb]

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 😳😳😳😳!

[michaelwynne]

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.

[Thriller]

Hahaha, not the Flux capacitor lol Thanks Steve for all the knowledge and amazing content! Cheers!!!

[THEFERMANATOR]

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.

[andersmontgomerie]

Love the Orwell quote on the dyno room window: All animals are equal, but some are more equal than others.

[johnnymissfire]

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.

[steelmill]

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.

[judgehastheword]

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.

[glenclifton]

You are right. I learn something most Everytime I watch a video. Thank you!

[lukk]

Old school Pro stock tech baby!! Love it.🤘

[CGT]

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 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.

[Nobody-ldmk]

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.

[CZ_Bob]

Dang that engine sounds beautiful up there over 8000 rpm. Reminds me of the SB2 days of Nascar