Fred Osborn wrote:

Paul,

I thought I had been following the butterfly position discussion but
now I'm confused again. It seemed that cars wanted the butterfly
close to the rotor to reduce throttle lag but that was not much of
a consideration for aircraft. Then recently you wrote that the
butterfly should be in close. Now in Doug's JPG, attached, I see it at
the outboard end of a relatively long manifold. Can you help reduce
my confusion again?

Fred O.

I don't think anybody said "cars wanted the butterfly close to the 
rotor to reduce throttle lag" It is the injector position that controls
throttle lag. Moving the butterflies close to the rotor housing with P-ports
reduces the volume of exhaust gases that find their way into the intake
runners causing misfires and ruining the idle.

Paul Lamar 
 
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