Think you're thinking 2 stroke. All "standard" combustion engines are 4 strokes. Such as those in our Mazdas and all street legal bikes. 2 strokes fire on every stroke of the piston, creating more exaust and should in theory spool a turbo faster. A 4 stroke fires every other stroke of the piston. 2 strokes however create mad power and really don't need a turbo. If you lay on the gas on a 2 stroke on any surface but sand you'll put your self flat on your back.mp5jeff said:4 stroke should be able to spool that turbo pretty good =)