I am looking to do a simple street build. Large frame (read t6) s400 turbo blow-thru E85 carb setup.

I have 2 choices in for my shortblock and was wondering which would be better? Both shortblocks would be built for boost with all forged internals

stroked ls1 383 or 370 cube lq9/ls2?

Heads will be slightly worked 317's with appropriate valvetrain. Camshaft will be custom gound to suit my setup.

Car weighs 3200lbs, stock suspension, radial tire. STREET car lol

Coming from n/a motors, i like large bore, short stroke. I am just starting research on a turbo setup

Please tell me the advantages and disadvantages of both

TIA

 

i have seen good results from both..I would go 370 for better head choices and it is a couple hundred dollars cheeper..

 

Here is my take on these blocks. The LS1 has thin cylinder walls and that is not good under a lot of boost. I think the iron block is much better for this application. That being said, there are a ton of guys who make big power with the LS1 blocks.