IN any aspect of racing the acceleration and braking is what you want to look at. It doesn't matter if you can out corner some body if they can get to the turn and fiddle around then shoot out faster then you. Then again I'm a balls to the wall guy and love the 4-tec. Big fan of the trx 2.5 so this is a biast opinion. If you don't overtune the 2.5 it wont give you any problems.

Just my two cents though.