Do you think that a Gen 1 SBC 350 could reach Gen 3 LS power levels approaching or exceeding 1000HP with forced induction via a turbocharger(s) ? I think that Richard Holdner was easily able to exceed 600HP with twin turbos.

What heads, valves, cam specs & was it advanced? Also what rods & were the pistons special? I have been building 355s with Vortec heads,,202/160 valves, pocket ported ect. 425 with close to 11.1cr on 91 octane. What's the advance curve look like & is it all mechanical or do you run any vacuum advance? Looking to build better tq engines for suvs & pickups. Thanks

Pair that top end with a 400 crank bottom end and you’ll make even more HP and TQ. Outside of lower rotating speeds (potentially long engine life) I don’t see the benefits of de-stroking an engine.

This got my head wrapped around rod ratios!

This is what the Chevy 3.6 and the ford 3.7 and 3.5 is based on. I’m glad I’m not the only one seeing this 😂

Dude! I have this magazine in the garage! Magical!

This combination was widely done in the 80s

That what I keep saying. Big bore, short stroke, long rod...

In my opinion nothing better than the 427, I have a couple engine designs I would like to try to build but I don't have the money, it requires making a crank and a cam to match each other, also in my opinion, combustion engines are nothing more than artificial life.

A buddy of mine built a 353- 400 block with 327 crank. It had such a big cam in it that it sounded like two motor cycle engines bolted together. It idled at like 1500rpm with a 4/7 swap cam it pulled@ 9" vacuum. 575hp at 7100rpm. But what was impressive was the torque curve was dead flat from 3500 on up. We put it in a cj7 jeep 😂

4.185 is .060 over. STD. IS 4.125, so 4.165 equals .040 over. .Hope this helps.😊

That's not a 400 block it's a 360 maby bored out but it'd be easier to run a 400 block the reason I say this is the 400 small block has three freeze plugs on each side instead of two like the 350!!! But your idea is a good one lots of Rs and ponies but less torque of course!!! Excellent build since torque break's parts but ponies can push your tushy down the road faster!!!!

Why? They are gutless on the street.

Yeah…most got it backwards because some folks got their rocks off by saying “stroker”. My son and I bought a used Dart block at 4.145” bore and used his 3.80 SCAT crank and super lite rods in 3/8 mile dirt track engine and made way more power than the tires could use. 375+ inches

Why small stroke? What are using this combination for?

If I recall correctly, the flaw of the SB 400 was that several cylinders were siamesed and the engine was prone to overheating. The 400 did not do well in the trucks.

But certain machine shops in different places if you're building an engine they want to know all these specifics but they've never actually driven one

13 to 1 you can run on pump

I've literally had big block Chevys. The old pump gas thing is definitely untrue

How long are your rods?

oh..you mean the Ford 351W, yes it did.

And there's dyno test to prove that even the motor you're talking about would never do better than a 400 with upgrade you can look at Richard holdner

So maybe higher revving but at the same time. You have to balance your motor. But maybe I'm confused on what you guys are doing but bigger cubic inch is definitely always better but you have to balance

A 400 small block andmmm make 600 horsepower. Lower RPM. Are you doing this going in reverse making the Dz 302

Valvetrain + turbo = top speed monster.

I built something like that but used a set of Rhodes two stage lifters and double roller rockers . Below 2700 rpm it gave what ever your cam lift was above 3300rpm they added near 40k lift to cam with 1.5 rockers . As long as valves clear try 1.6 and Rhodes..

Your Father would be proud. Thank you.

THIS is a great build. its exactly what i was looking for. i have 74' sbc 400 block.... i dont know shit about building an engine but im figuring it out one video at a time........ CHEERS

I thought 400" small blocks had 3 freeze plugs on each side???

Own a 350 Camaro '67 model and have for 49 years! Been well satisfied, but wish Chevy engineers would have done it this way!

LS swap

Just think, the 327s back in the day made 375 hp from the factory.

I'm pretty much hooked on big bore short stroke combos. I have a 13 to 1 , 377 sbc with a 830 Holley and other then my dog it's my best friend .

Krazy kool...thnx

You guys are awesome fact.

Try the 302 steel crank next time with 13:1 compression and right cam on 87 octane gas. 😉

Not a SBC But....My Dad and I were into Oldsmobiles when I was in High School, Late 80's. He had a '68 442 (look up the terrible bore/stroke on that thing). I had a '68 Cutlass S, factory 4 speed/350 4 barrel. The 350 Olds has a slightly shorter stroke and slightly bigger bore than a 350 Chevy. I worked at a machine shop in HS so I built a 403 Olds (same stroke as 330/350 Olds, but with a huge bore (standard bore 4.351!). The one I built was .040 over so bore 4.391! Those pistons were huge! Put the 350 heads on it (had to drill out head bolt holes, the 403's have bigger head bolts, and put in the biggest valves we could. Ran low 13's at 106 mph all day on 235/70R14 street tires. Even missed third gear (went into first gear!) a couple times and didn't hurt it. Valves would float at around 6400, so that was the redline. I beat the piss out of that thing, Best engine I ever built. Also built a couple 455 Olds, the worst engines I ever built!

MY CLIENTS WANY O SEE 6000 RPM STREET, GET IN GEAR AND STOP WASTING OUR TIME

Smokey Unix rocks she's badass and knows his shit better than anybody or did should I say

Yeah you’re the first ones to cut and trim wires 😂

That’s was a great video . As an owner of 2 german v8 cars (a 2000 m5 with very complicated engine design- a 5.0L quad cam , quad variable valve timing , 8 throttle bodies and a lateral g activated oiling system ) this old American v8 , simplistic in design but very robust and easy to work on made more power and torque than my m5 (which has 400hp and 370Lb/ft which ain’t bad for only 348Lb including accessories). After a complete rebuild of that , I find myself more interested in the classic American v8 engines - lol.

I'm planning a LS build that goes in the opposite direction - Small bore 3.903", 6.275" con-rods and long stroke 4.125" w/ high compression ratio 12:1 and 66cc combustion chamber, all kept in check w/ water injection. Hunting for max thermal efficiency. Maybe a Whipple S/C at some point - Dreamin'.

Thanks for the video.😎

Great build. What heads, valves and cam are you running?

Go with bigger valves and tighter LCA cam same lift and probably would pick up 50 or 70 hp

Wicked Sound

Buick had the same idea with the 401/425 nailhead and the newer 455 motors; big bore short stroke. Look it up.

What brand lifters are yall running ?

Just a reminder to all the "race" guys. Learn to pull out just enough pecker to win the contest. Aka, don't mess up the show.

Thanks for the video.