i want one of those 500 hp things in my avatar and mike_s needs one to ha he hit 523 this weekend like 2 hp below what mine ran with a stock turbo he he :hug:
Last edited:
Your best bet would be to make a dyno TCM tune that keeps it from downshifting.
I have the one from my truck that I used. I set it up to dyno in 5th. If you send me your stock TCM tune, I can mod it for you.You happen to have one?
Drop the 3-2 downshift speeds so it is just above the 2-1 downshift speed by a couple of MPH. Drop the 4-3 downshift speeds so it is just above the new 3-2 downshift speed by a couple of MPH. You will also want to raise the 4-5 upshift speed so it won't shift to 5th during your run. Make sure you do that for both part and WOT tables. You will probably want to check the converter will stay locked.
I like to make the changes to the T/H portion of the tables so I can have normal shifting when I drive, and I click it into T/H once on the dyno and it stays in gear with no downshift or upshift.