Don Dunbar wrote:

Hello Paul,

  Looking at the intake arrangement for the intake manifold. As you
  have the car in the flesh and can see where all the pipes go. You
  will be able to enlighten me. As I read the attached intake
  schematic and calculated prop RPM the operation will fall in between
  the 7250 and 9100. With my 2.85 reduction I will get 2982 prop at
  8500 engine RPM and 2543 prop at 7250. With this in mind I should
  run with the right hand schematic. I was looking to use 2 throttle
  bodies that I could set up with different opening timing with one on
  the early ports and one on the two late ports. What are your thoughts
  on a system to suite our application.
--
Best regards,
 Don                          mailto:ddunbar@echidna.id.au

Forget all that mess Don. That RX8 intake manifold is designed to genrate
a lot of torque at low engine RPM for use in cars while in first gear.

All you need is an RX8 engine intake system tuned for 7250 RPM.
fixed pitch prop load goes up with RPM cubed. Those are the curves
on the right in this picture. The curve on the left is the dyno load
of a 215 HP 13B two rotor. As you can see it has way more torque and HP
at RPM's below 6000 than really needed by a prop.

Paul Lamar
 
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