mikesimpalass

I'm considering turbocharging my impala SS, it has the 5.3l LS4. I want to run around 8-10 pounds of intercooled boost. Does anyone else run boost like that on a stock LS engine? What is safe on a stock LS engine?
thank you
mike

verve_v

My buddy turboed his ls4 06 monte ss. The engine has about the same stock strength as an ls1 or ls2 as far as boost goes. I wouldn't go past 8 but i guess you could do 10 with some perfect tuning and good fuel. BTW my buddies car made over 400 at the wheels on 8 lbs. Traction becomes a huge issue with the fwd, and the tranny doesn't exactly like to see those power levels.

smokinHawk

iTrader: (48)

as long as you have the octane, timing and fuel you should do ok, but there are no guaranties
what is the CR on the ls4?

mikesimpalass

The ls4's have 10:1 compression.
thanks for the replies guys!

67Firebird455

iTrader: (27)

I'd run 8psi to be safe. Might try 10psi with meth too.