New compression ratio, all else is the same.

[hammeron]

hey guys. i recently changed out my short block for a forged one, everything else on the engine remained the same. Old CR was 9.8:1, new CR is 8.7:1.

What do you recommend I change in my tune (i have SCT PRP), to bring fuel
trims back inline? I'll be taking the car back to my dyno tuner in the next few weeks, but was hoping i could do something to improve fuel trims before then.

[Joe@Trick Tuners]

It might need a little more timing with the lower compression. You can add or subtract fuel from the maf curve to line up the fuel trims if you haven't moved the maf or changed the intake position at all.

[hammeron]

thank you Joe. i'll go ahead and adjust the maf curve using fuel trims.