<< One difference Jon. At 8,000 feet and up the throttle is fully open due to
 lower air density yet the engine is generating only about 70% or less of
 max power. It is common in a normally aspirated A/C engine to cruise at wide
 open throttle at anything over 8000 feet.

 Paul Lamar >>

OK, then I'd concur that a benefit could be derived from setting the length
for cruise. The downside, as you have suggested in an earlier post, is that
max power won't be quite as high with the longer manifold.

Jon

 
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