Sounds kinda dicey to me. I would be afraid that even if it adhered to the surface it might flake off a thin surface layer when stressed. I have one with a 12" flywheel and there is quite a bit of "snap" when the piston reverses direction as it comes over TDC and BDC once it gets going good. I can hear the music wire connecting rod (which is preferably a little loose to minimize friction) click twice each cycle.Powder keg said:...Can you glue stuff to Graphite?
Senft uses a #4 machine screw with a nut on the top and bottom of the piston and a paper washer to seal it (and maybe cushion it a little so it doesn't crack). He files the sides flat on the top before drilling the hole for the connecting rod to pass through. Make sure all of this claptrap clears the bottom of the cylinder or passes through the air hole in the bottom without hitting.
I found that a #4 screw thread didn't totally clear the hole in my piston and the screw kinda tapped threads in the graphite as it went in. It held so good I never went back and put a nut on the bottom.
Anyway, the graphite material is very brittle and can crack easily if stressed.