I also went to the track with my over 3000lb 2.0L I4 powered car and ran 12.5 FWD on radials and stock motor. I have no doubt that it is easier to make power with a larger engine and definatly easier to make tourqe but dont doubt a motor just because it is small I and Joe have around 400HP+ to the crank with a COMPLETELY stock engine. It is common for a supra to get 700-900HP to the wheels with the stock 3.0L motor they have. It is all about what you want to drive and spend money on. Have fun!