In that sort of race, stock, the B16A would probably win simply because you'll spend most of your time in the upper rpm range which is where the B16A has most of it's power. Also, assuming your using stock trannies, the more aggressively geared B16A tranny will help it outrun a B18B but not by much. In normal driving, the B18B will "feel" much stronger and faster. Seeya.