RE> First post here, hello everybody.

RE> I'm looking for some feedback on Renesis header design, which may be
RE> mostly theory at this point due to the newness of the design. With the
RE> Renesis having zero overlap intake/exhaust timing, gentler exhaust port
RE> opening/closing timing, and a shared siamese center port between the two
RE> rotors that is smaller than the end ports I'm wondering if the
RE> traditional header concepts for scavenging, tuning, etc. are now out the
RE> window.

RE> Thoughts?

RE> Mark Sipe

RE> Yes it is an interesting situation. In theroy the center pipe
RE> should be around 16 inches and the two outer pipes 32 inches.
RE> The center pipe pulses twice as often and the pulses are
RE> 180 degrees apart e-shaft rather than 360 degrees on the end ports.

RE> -------------------------------------------------------

RE> Something like this might work.

RE> Paul Lamar ...No rotor no motor.



Hello Pual and group,
Does any one have figures on the Renesis engine to what it could
produce in hp if a tuned length exhaust system is used. On the car
they are short headers. We have a dyno graph of the Renesis as
produced for the RX8. The power from the dyno graph would only
represent what there computer wanted. Mazda would be looking at all
aspects of power from the engine. They may be limiting the amount of
stress on all the drive train through the rev range. When I look at
the hp graph the output line is straight. This would indicate that the
output is controlled by the computer to maintain EPA regulations.
Until we run an engine on a dyno with our type installation I feel any
decision is pointless.
Regards Don


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