[Joshinator99]

Originally Posted by Ajs16400

So you would suggest the fuel system upgrade over headers and intake?

Yes, fuel first, if you cannot do both.

Originally Posted by DorkMissile

Stock LT1 fuel system will run out by 560-580hp on premium fuel with 10% ethanol. You might get to 590 if you can find un oxygenated, but it just doesn't have enough capacity on volume past that.

The LT1 is stout, but the pistons / rings will not take ANY detonation - and if you are max send all the time on fuel delivery, it is just a matter of WHEN, not IF you will get some knock because the high pressure system noses over.

For what its worth, the LT1 comes with a tri-y style manifold stock, if you do cat deletes you will get 8-10hp of the 12-15hp that long tubes get you. I made 700whp on the stock manifolds with 10lbs of boost and E85.

No sense going boosted IMO without at LT4 HPFP, LT4 Injectors and LT4 low side pump (if your car is a 1LE, it will already have the LT4 low side pump). You are limited to about 6lbs of boost without it.

Well said.