Roy Davidson wrote:

Hi Paul,

I had a couple of questions on the "compact intake manifold".  You show a 1"
radius bell curve at the "end of the tube".  Which end, engine side or
throttle side (or both)?  Also, is the tube length supposed to be tuned for
max HP on take-off or at cruise?

Thanks,

Roy

Throttle side. Not both. Very important. Worth 5 to 10% more power.
Make the throttle body three inches ID. You can also make this inside
out with the plenum inside the loops. If you make it out of composites 
make it extra thick and insulate it well from the heat of
the exhaust manifold. Probably much safer to make it out of
180 degree aluminum tubing bends.

Well if you have a good power to weight ratio and plenty of takeoff performance
and you tune it for cruise RPM in theory you might get a bit better BSFC. 
Lower fuel burn. We have no data to substantiate that yet however. 
Else go for max power.

Paul Lamar
 
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