>>> rotary engine tuner. And that is this. The diameter of the pipe also
 >>> affects
 >>> the tuned length. Surprise! Have you been to

church lately and seen

 >>> an organ?

Paul, I would think your points on tuning should be beaten into everybody. The point on the Lemans engine is that to make it tractable enough for A RACING CAR which will often compromise drivability for power they still used the variable length intake! The ports on the engine are LARGE the diameter of the intake tube and the short length prove tuning for probably 8500-9000 rpm as well. Finally the rotary is a ported engine. (duh) Any change in port height is a timing change, both exhaust and intake. 

The 2 cycle racing engines I used to work on were dramatically effected by small port changes. Even
the entry angle was CRITICAL. This is of course apples and oranges, however, small port timing
changes WILL effect your performance. Sometimes working in areas you do not expect, like preventing
the engine from running through a certain rpm. (say around 3500-4000) The exhaust systems bends we
must put into our systems to make them work are also a major tuning factor, they are very

inportant to the standing waves and overall efficiency. Paul I know you know these things but often amature tuners will dive in where engineers fear to tread, with good reason! Bill Jepson

You would be surprised Bill if you ran this newsletter for four years :-)

This electric water pump crap has been a particular problem. There is
a sucker born every second. Junk science is a fertile ground to be
plowed by the scam artist and charlatans of the world. Problem is
we don't make all grammar and high school students study physics.

Paul Lamar
 
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