As long as your valves don't leak, you should get most of that power back when the compressed air pushes the piston on the power stroke. --J.B. > > From: "Lonny Clark" <lclarkpdx at gmail.com> > > If you leave the spark plug out, it's > noisier but will have better power. If you leave it in the engine has to > compress the air in the cylinder, which takes power.