Vette knocking

[dstage]

At low boost 7psi car does great. At 10 psi car knocks at full boost and pulls 4 deg timing. Air fuel is between 11.3 and 11.5 but when car knocks in 4th gear at 5ooo rpm air fuel jumps to 13.5. I really dont wont to run high octance gas all the time cause $$$, I think that would solve it, currently using 93 octane. Prob need to do a forged motor, but I'd like to see what the LS2 is capable of on stock bottom end. Guess I have met its limitations. Any advice???

[Zteve]

Originally Posted by dstage

At low boost 7psi car does great. At 10 psi car knocks at full boost and pulls 4 deg timing. Air fuel is between 11.3 and 11.5 but when car knocks in 4th gear at 5ooo rpm air fuel jumps to 13.5. I really dont wont to run high octance gas all the time cause $$$, I think that would solve it, currently using 93 octane. Prob need to do a forged motor, but I'd like to see what the LS2 is capable of on stock bottom end. Guess I have met its limitations. Any advice???

A forged motor is going to do anything if you're leaning out. You either have a hole in your tuning or you've maxed out the injectors and or fuel pump. Fix that and you're back in business.

[dstage]

Originally Posted by Zteve

A forged motor is going to do anything if you're leaning out. You either have a hole in your tuning or you've maxed out the injectors and or fuel pump. Fix that and you're back in business.

Yea, Thanks for advice. Think fuel is maxed. Gona try APS fuel pumps