Buddy of mine has a 05 GT

JLT Cold Air intake
Gears
Tune on a XCal 3

I know that with nitrous you want the timing retarded, but I was wondering what would happen if he went back to his stock tune with the intake still on...

 

He could just get a nitrous tune sent to him and upload that tune when he goes to spray.

 

ya he contacted justin today...he was hoping he'd be able to use it at the track on friday though..told him hes putting him on a little short notice, lol..

 

If he has an X-Cal 3 he can pull the timing out himself. He can designate the RPM range and pull out a couple of degrees per 50 HP. Pretty simple menu in the X-Cal. Then when he's done racing just put the timing back in or just leave it out. He may be down a few HP NA.