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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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