My warranty is almost up (shifting problem) beaten by a S4
When you say you "launch at 2K" are you talking about a brake rev? If you're brake revving too hard, you're probably just burning up tires, as well as the transmission. A perfect start should be a 1/4 second tire squeal, then hookup. Big burnouts look cool, but slow you down.
Also, big wheels/tires add a lot of unsprung, rotational weight, which has beeen shown to slow cars significantly, particularly off the line. You'd be quicker with your original tires.
You do not have to replicate it while test driving it. simply ask them to run a check on the intercooler pump. If the intercooler pump completely fails when they run a voltage check they will come up with a fault.
once the intercooler pump is replaced the car will be good as new. A Chipped B5 S4 cannot run on pure 100 octane. Most likely he's on mix. You should not have any problem with the chipped B5 and the new B7.
I usually keep the launch rpm around 1500. all you want is to get rid of the initial throttle lag, but not over do it and cook your torque converter.







