Richard wrote:

> In developing the intake system for the one-rotor, I got some
> surprise. When I got to the point of running both ports, side and P-P,
> on one carb each, I tried to coordinate the cup(close-up butterfly)
> with the carbs, there was no impact from the cup at idle or anywhere
> else up to 3500RPM. Starting the engine with the cup full open was
> normal. Naturally, I removed the  cup and the engine is just running
> fine. Throttle response with the P-P carb alone is very smooth and
> solid. Idle speed is now at 1500RPM with the mixture not optimized yet.
> So much for the cup in my case only.
> I what I observed here holds up, the combo port idea may be dead
> making the one rotor a more simple and better engine.
> This also reminded me of the NSU Wankel Spider, which did not have a
> cup and was running very fine.
>
> Richard Sohn
> N-2071U
> unicorn@gdsys.net <mailto:unicorn@gdsys.net>

As the Laugh-In Nazi used to say,"Veeelly interesting."

I've been asking people since long before I got booted off the other
list if they knew of anyone who had run a PP with electronic injection
instead of carbs to prove that it was the PP itself causing the idle
problem & not bad mixture & mixture distribution due to the low flow
rate & bad tuning issues of carbs at idle. (Top *that* for a run-on
sentence.) I always got the answer that the problem was due to overlap
between the adjacent chambers in each rotor but no one ever said that EI
had been tried on a PP 2rotor.

Ken Powell needs stop his world traveling &  get his PP running so it
can be proven whether it's overlap or bad induction causing bad idle.

Charlie

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