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 theory 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.



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



Hello Pupal,
I not that you posted my e-mail without comment. I would be interested in you
knowledge and input on the subject.
Don