Jeff Spitzer wrote:

At 02:28 AM 2/3/99 -0800, you wrote:

I don't think anybody has addressed this issue yet
with a modern electronic fuel injection system and
electronic ignition. There may be some combination of
mixture and timing that would tame the idle.
Everett was using a rather simple ignition system
and an inflexable mechanical fuel injection system.

I expect you are referring to what is called three-cycling on a peripheral
port motor.  It has nothing to do with the mixture or timing.  When the
throttle is closed and there is very low pressure in the intake manifold,
substantial exhaust gas fills the intake manifold during the overlap
period.  This charge doesn't burn very well and the power and exhaust
pressure is reduced.  This happens for three cycles (one rotor revolution)
until a low pressure exhaust event dilutes the intake less and a better
charge quality is introduced for the next three cycles.  Three on, three
off.  Sounds (and acts) just like having a big cam on a piston motor.
There's no hope short of what Everette did which is "remove the low
pressure intake manifold".

Jeff Spitzer

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