i love my 230/230 comp grind, but it is on the ragged edge for a reg street car. i say 221-224 area is perfect and if you can get that TR 224 grind, GO FOR IT. esp if it is on a GP now. with tuning the damn thing will be smooth like stock. i have NO hot start problems with my big cam, a smaller unit will have nothing to worry about. also, are you a MN6 car or A4? if you have a clutch, absolutely nothing to worry about!