This debunks the myth of a peripheral port engine not running
at less than 7000 RPM. This engine shows 150 HP at 2000 prop
RPM or 4600 engine RPM. The intake pipe tuning is about optimum
as the power is flat from about 2500 to 2700 prop RPM.
The engine has a rev limiter set at 6250 engine RPM or
about 2700 prop RPM. 

Paul Lamar
 
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