Oddities Tuning an 07 Cobalt SS LSJ

[Injected1]

Ok, I am tuning my buddies 07 Cobalt SS with a 2.8, CAI and 42# injectors. We dyno tuned it and got 12.0 across the board, car runs great EXCEPT that at 5800 RPM on EVERY pull, the car dumps about 10% more fuel and pulls 3* of timing for 100rpm range. As a result for about 200rpm the car loses 15hp. I can post dyno sheets and scans when I get home. I turned off all the torque management and boost knock-off because it was pulling boost at that point before. Looking for ideas.

Ben

[383_Stroker]

I'm interested in this answer too as you can see...

[Bill@HPTuners]

Cobalt SS Injector duty cycle doubles at 5800rpms Our stickies are packed full of useful information and are a must read for everyone.

[omega_5]

Like Bill's sticky says.... dial in the VE.

[Injected1]

Cobalt SS Injector duty cycle doubles at 5800rpms Our stickies are packed full of useful information and are a must read for everyone.

MUCHAS GRACIAS BILL.