Quote:
Originally Posted by camcojb
I don't think you need an aftermarket block at 1000 hp, Kurt (W2W) had no problem with my stock LS2 block at that level. Still doesn't as he's spec'd another for Troy at 800 rwhp with the stock LS2 block, no ERL prep, nada.
My two cents................. 
Jody |
Yep. I told Kurt I wanted about 800rwhp on pump gas for my new turbo LS2 (that's about 950 crank)...
Kurt spec'd me a STOCK block and a STOCK GM crank.
Kurt said both the factory block and crank will be plenty adequate at this power level, he has used the both reliably above this power level and advised me to save my money or spend it elsewhere.
As you approach 1350 hp / 20 psi of boost or so, a stock 4-bolt LS can start pushing coolant out-- that's where the LSx and 6 bolt heads shine.
Kurt is modifying my LS2 block with piston oil squirters though-- I asked if he could modify the block with squirters and he said yes-- so I said go for it. They are a very good idea for any forced induction build-- nearly all factory FI engines have piston squirters. The new NASCAR blocks have 2 squirters per cylinder. If you're going to track the thing, you absolutely positively want them! Really helps the pistons out and also keeps detonation away by maintaining piston temps.
With 1000fwhp on a track, I hope you are planning on a very large cooling system. Cooling 1000hp in a prolonged sustained use environment is NOT going to be an easy task...