First post here, hello everybody.

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

Thoughts?

Mark Sipe

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

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Something like this might work.

Paul Lamar ...No rotor no motor.

Paul... functionally, what are the benefits of tuning via just changing the
diameter of the center instead of *only* making the length change??

Gary Buster
East Texas


I am not sure. It definetly has an effect... maybe... probably :)

Here is something that might be a little better.
1.75 OD tubes on the ends with a 2.5 inch radius 180 degree bends
with a 2 inch OD tube in the center. A bit closer to 2 to 1 length wise.

You did not say I had to fit it into a car did you? :)