hi there. i finally got my custom tunes on my SCT X3 the other day, loaded up the 87 perf tune. i put in my revs per mile for my tire size and found it is 3mph off of my GPS and it is also noticeable that it is not in the same place it was. but i was wondering, do i have to go back to stock tune and reload the custom tune with the corrected revs per mile or can i just change the revs per mile with the custom tune already loaded? thanks

 

Yes....I think you do.

 

ok, thanks

 

Hi Timmy.


It's probably too late, but ...

You in fact, do not need to return to 'stock'

Just reflash the same tune, but with any end-user adjustment changes as required. Adaptive is reset in any case.

This also applies to Edge, etc flash devices....

... as Sir Shotgunz has recently 'discovered', lol: https://www.f150online.com/forums/4362579-post17.html


MGD

 

no i didnt change it back yet. right now speedo is reading 3mph faster than i am actually going. tires are 673.33revs/mile, i put in 675, so ill try 670