I always assumed performance shift only affected the trans settings in PCMs. I have asked before and no one has given me a straight yes or no answer.
I was driving to work with PS off and wanted to see how much boost I could hit with the cooler weather. (hit 9.5 the other day when it was 89ish and 70% humidity) Go WOT and only saw 7.5 PSI at redline. Odd. So for shits and giggles I turn PS on and drop back down to the same speed and nail it again. 9.6 PSI at redline. The owner before that had it tuned said he only bumped the shift points 300 or so RPMs higher in PS mode so I wouldnt think the car would build 2 solid more PSI of boost. Or will it??
I was driving to work with PS off and wanted to see how much boost I could hit with the cooler weather. (hit 9.5 the other day when it was 89ish and 70% humidity) Go WOT and only saw 7.5 PSI at redline. Odd. So for shits and giggles I turn PS on and drop back down to the same speed and nail it again. 9.6 PSI at redline. The owner before that had it tuned said he only bumped the shift points 300 or so RPMs higher in PS mode so I wouldnt think the car would build 2 solid more PSI of boost. Or will it??