I've been fighting a vacuum/tune issue ever since my nnbs intake swap and new cam. I did find my cai was leaking and a leaking exhaust gasket. It does right on some days and then somedays it will totally screw up. Swapping from bank to bank pegging out fuel trims.

 

Looks like it was a messed up O2 after all... what the hell are the odds that it goes bad while I'm doing a head swap. What a pain in the ***.

Glad I got this all behind me though. The tune is almost dialed in. Truck feels strong.

 

Nice! What is the new compression ratio with the AFR's?

 

should be about 11.0:1. They're a 65cc chamber

 

with a better torque converter youll be in the 12s no problem.

 

Just luck of the draw unfortunately... Just happens from time even in repair shops.

Glad you got it fixed though!!! Thanks for the update

 

Even in the summer heat I'm showing 0-80 in about 8.8-8.9 seconds. Thats carrying more weight, and much worse weather than my best 1/8 mile runs, which werent quite that quick on my logs but right on the money for what the track was telling me. All things considered and being equal with only the heads being different I'd say they were worth .3-.5 It's really hard to judge though.

 

nice to hear you figured out your problem my truck is still down at dons goin on 2 weeks now

 

Man thats gotta be frustrating... you'll track it down though. How long has it been acting weird for?

 

since i put the FAST intake on so almost a month id say.

i guess he fixed the hard start i had some bad grounds that were causing it.