Dear Kelly/Paul,
This is a question unrelated to the mount but my question is on your intake
manifold. There is not the suggested 18" of runner length between the
throttle body and the intake ports tuned for approx. 6000 rpm. What am I
missing here? If this is the case I'll go the way you did on the intake
manifold.

Ken Gillanders

Ken Powell wrote:

Hi Ken,
It is said that an untuned intake manifold costs somewhere
between 15 and 30 HP.  The short manifold being used by many is
really tuned for 8000 to 9,000 rpm - the guys racing can provide
a more accurate number.  I am planning on a manifold design that
can be tuned with a length of rubber tube so that I can
experiment with lengths from 18" to 24".  So yes, you are
correct.  However, in an aircraft sometimes packaging is just as
important and we have to use what will fit.  I have build a
mockup of my RV-4 firewall just so I can try different
configurations.

Ken Powell
 

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