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Tracy:
Could you give me a little more detail on the manifold you used that gave the best performance. (1). Was it designed so that a pulse exiting rotor #1's runner would flow into the open end of rotor #2's runner or did it use a large plenum similar to what you have on the Renesis in the RV-4. and (2) Was the manifold good for takeoff power vs high speed power or overall good at both.
Thanks,
Dennis H.
Tracy Crook wrote:
Yep, you're right Dennis. I had mentally reversed the order of the manifold valves and my measurements were between the face of the block and entry to the dynamic chamber instead of port opening to center of chamber.
My best overall manifold that I used on my 2nd gen engine measured about 20 inches using your points of reference. Also keep in mind that the 4 port Renesis was tuned for a power peak of about 7400, not 8500 like the 6 port version. Tracy Crook
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