motorheadmike

Hey folks,

I've got a daily-driver '04 LS1 M6 GTO. My initial mods were a small Comp Cam (212/218 .558/.563 115), JBA shorty headers, K&N CAI, and a Predator tune that I had to up the WOT fuel a bit. It ran surprisingly well, blowing off the tires and easily bouncing off the 6500rpm rev limiter.

Of course I eventually got bored and wanted a little more, so I installed TSP Stage 1 243 heads and long tube headers with high-flow cats. Now it seems like the torque is down and it just won't rev. I've tried playing with the Predator tune, but it doesn't seem to make much difference. It seems to run well at part throttle but lacks power at WOT.

What gives? Are the heads too much for the cam? Am I out of injector? Do I need to pitch the Predator and get a custom tune? Any thoughts or ideas would be appreciated!

eamador11

You need to log the afr with a wide band. either by dyno or street. without it, you wont know what the motor is doing.

custom tune with EFI live or LS2 edit is your best option hands down

motorheadmike

Sounds like good advice. Time to get a custom tune.

5_02ls1

iTrader: (20)

get a tune