Do any tuners offer the ability to have multiple programs on the chip. With my S4 I had to send in the ECU to have a new chip put in place. There were multiple programs on the chip. Stock mode and tuned modes ie 1bar or 100octane mode. With my cruise control stalk in the car I could change between modes in the car. If I took the car in for service I would change back to stock mode and could even erase fault codes on the ECU. One of the companies that offered this was APR (Audi Performance Racing). It was pretty cool and yes I know there is no cruise in the evo, but I figured there would be another way. Or if by using a laptop or PDA you could accomplish this.

 

You need to talk to dyno shop about "Autologics!" This is a little box programmed with up to 4 different tunes switchable on the fly. You can even look them up on the web i believe... that should get you going in the right direction. Also they are only like $250!!