Reply to "4V CC head porting with pressed bronze valve guides."

jeremieMember

wow did not thought I was that far !! It reminds me my mopeds I had one where I gringed a but the exhaust transfert and made a mirror polish on the whole exhaust port (it was a 2 stroke) it worked just amazing !! And I did that just by intuitions, later I read books where it was explained how to get 20HP from 50cc lol the thing is : I was not aware was that grinding the exh transfert was reducing dynamic compression ratio, exactly like using a big cam on for strokes. So I had still room for improvement, but that was safe.

I may should build a race car as next project

and ... and come to the US

I'll clean the chambers only.

Nice WE

9/18/154:42 AM

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