when you switch tunes, is it instant, or do you have to drive a few miles to give the car a chance to recognize the new tune? im going to the dyno next week, and im doing 3 pulls. one all motor, one with a 100 shot, and one with a 125 shot. so i will be switching my tunes 3 times.

 

any takers??

 

Its instant, it will be the only tune in your PCM since your stock tune gets loaded on to your SCT.