RE: Grpro 100cc twin. or?
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First: Milton, The 100cc rear induction will turn a 27X10 Menz S at 6700RPM that is at the coast on STD Mufflers, on one of the first and early engines, the same that Pat received from me. This engine has been running on 32/1 Castrol TTS a total of 7hours and 40 minutes now. As Pat has stated, the reed assembly has eaten itself by the half hour mark. This was due to bad machining; the reeds actually stick out above the reed retainer (I have no Idea what one calls the thing really, maybe its the cage) The new reed's hold up fine.
I would love to see a video of that, Ralph Cunninham posted on another site that he got 6400 on a 26-10 with the engine that he fixed for Pat, He is a little higher than sea level
At 6700 with a Menz that is stronger than a DA, That is great.
Milton