Welcome to the Ford Mustang forum built for owners of the Mustang GT350, BOSS 302, GT500, and all other S550, S197, SN95, Fox Body and older Mustangs set up for open track days, road racing, and/or autocross. Join our forum, interact with others, share your build, and help us strengthen this community!
Yep. There is a specific field in the PCM Trackey calibration menu for tire diameter, which a dealer can access and change to the actual tire diameter you are running (stock tire dia is 26.7"). No need to reflash TK. Not sure if it covers different front/rear diameters, or only accepts a single value.
That's great info. It's a shame the car's owner can't make those adjustments with out taking the car to a dealer. I'd love put 100 octane in at the track and tell the computer that it has 100 octane. I use 28" tire at the drags, but don't drive them daily. There again, I wish I could make that small adjutment with out taking it to the dealer.