blk02gmc

iTrader: (1)

I bought a complete trailblazer ss ls2 for dirt cheap and should have it running in my 03 rcsb silverado this weekend, the plan is to do a single turbo on it in the next month or two... how much boost are people running with these ls2's and what kind of power can the stock bottom end hold up to?

oakley6575

iTrader: (5)

You will be limited to the compression the LS2 has. At 11:1 SCR you could probably push 10psi and be safe on pump gas. That is assuming your tune and intake set up is spot on

TXsilverado

iTrader: (19)

i'd pull the 243 heads for some lq4 or lq9 heads to drop the compression some.

blk02gmc

iTrader: (1)

im new to the turbo thing, the plan is to try to run e85. if i run e85 which is a higher octane fuel will i be able to run more boost even with the 11:1 compression? if i wanted to change the heads which ones would you run the 317s?

oakley6575

iTrader: (5)

Yes I would also put 317's on it. E85 will help with detonation but you can only push things so far before it isn't safe anymore. You would be a lot better off by dropping a full point of compression.

blk02gmc

iTrader: (1)

what do you think it would drop to with 317's? idk the specs on those heads

Vortec350ss

iTrader: (20)

Take a look at the LQ9... it will match that exactly.

10.1:1

blk02gmc

iTrader: (1)

ok sounds like my plan then is 317's anyone know of any for sale for a good price?? What kind of power do people start having problems with the aluminum block and stock rotating assemblies?

oakley6575

iTrader: (5)

I have a set at work that I could ship today if you want. I will be out of town for the next week and a half.

George C....

seen a ls2 with worked 317s make 800 rwhp on 11 psi with E85