Actually you can add as many cylinders as you want, so you could make it a V8 or V20....... Oh, by the way, I posted this video. If you want more inf o you can watch my previous video of this engine on the dyno. That engine makes 890 horsepower. This one makes 76 horsepower.

oh, btw, this is a Revetec engine.

This is a cool design, it would be even cooler if they made a diesel versio n because this is a low rpm design. There is also an airplane engine calle d the dyna-cam which runs in a similar way. This engine is more expensi ve to make then an inline 4 because it needs 2 heads. It would be better a s a 6 cylinder or an 8.