Hi Jarrett,
How's the "big machine" install coming along? The key to the overlap problem is proper exhaust tuning. If the out flow of the exhaust is adaquate there will be very little cross flow. In fact the outflow can assist the intake. My "best" system would be direct injected so there wouldn't be any fuel in the intake charge.
Bill Jepson

Bob Mears wrote:

And let me assure you, a P port will NOT get the same GPH. Theres
a lot of fuel wasted with the P Port due to the overlap in timing.

I've always wondered about this. Realizing that the P-port exhaust lets the unburnt fuel into the the exhaust to be burnt there and lost as a potential for power. What about a Renisis with the side port exhaust? Wouldn't a P-port Renisis not have this problem, and therefore possibly produce more power per GPH fuel flow over your typical 13B? Or am I missing the big picture..

I've always wondered this..

Jarrett Johnson



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