Spectre86

iTrader: (42)

Prett basic question. Whats a "safe" limit for the stock bottom end on a lq9 and lq4 engine? no spray. very mild cam, and a centrifugal supercharger. Not looking to run 15psi or make 900+hp.

Would 650rwhp be a safe "area" for it? I dont want to push it to the limit, but at the same time I dont want to have a ticking time bomb.

I see alot of people making 500-550rwhp on the stock ls1s. Iv read that the lq9 and lq4 rods and rod bolts are a lil bit stronger as well.

I know alot has to do with the tune, but assuming the tuner knows what he is doing.

Whats a comfortable whp level for a stock internal lq9 or lq4.

Jimmy P

iTrader: (177)

Most will say a safe level is around 550rwhp. Lots push it much farther than that, but they know the risk that they are taking.

Spectre86

iTrader: (42)

hmmm so the lq9 isnt any stronger then the ls1?

hellbents10

iTrader: (10)

The Lq9 has stronger rods much like the ls2's and all the 05/06' newer engines (5.3,6l). Being that the rods will bend before anything breaks with a proper tune up and good fuel, I would say that the Lq9 is indeed stronger. 500whp is just the level they will tolerate with pump gas and a little detonation. Detonate at 600+whp and the pistons will blow to bits. Keep it from doing that and the rods bending/breaking has been the only limit I have personally seen. That and cam bolts backing out when shifting early under boost.

Spectre86

iTrader: (42)

sounds like you have a very good tuner