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

"Michael D. Callahan" wrote:

    Once again, my Suzuki runs fine with the peripheral port. It's not the
port that causes problems, it's timing. If you advance the port timing to
allow the engine to run at 9,500 and create 500hp it is going to have too
much overlap to operate at low speed (most of the charge will be blown out
the pipe), but a conservative peripheral port does work.
    Question is, "Is it really worth it?" You can make just as much power
with relatively stock porting and save a bunch of money which can be spent
on a turbo that will definitely make a big difference, especially at
altitude where we need it most. Mike C

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