It has to be the exhaust, try a sport or even a stock, I remember a certian vw with the same problem in gt3, everyone said " this car stands still when launched" I sold the car for some reason so I need to win it again to make sure. If the exhaust isn't the problem then get the gears as close as possible and use a high final, like over 4.
I'll check back in a while after I can drive the thing.
Just checked, no go on changing exhaust, however that will fix lag on some cars. Full tranny trick with auto at 1 and final at 4.00, keep your foot on the gas a little while braking or try a little asm, both seem to keep gas on all the time. Hope it helps, I like the tune.
