Reply to "OK, engine hop up only good for 10-20 HP."

George PAdmin.

DeTom,

The idea is to set the closed chamber heads up with the right amount of "squish" clearance, then adjust the compression ratio with a dish in the piston dome that is a mirror image of the shape of the combustion chamber. The compression ratio sould be set up to work with the octance of fuel, cylinder head, and the camshaft you are runnng. When in doubt, the cam manufacturer should be able to tell you what compression ratio to run.

Then you have the whole thing optimized on a dyno, carb and ignition calibration.

Finally, do the tune ups your self.

Your friend on the DTBB

3/11/0612:15 PM

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