One more suggestion: set up your valvetrain - spring pressures, valve weights, etc. - so the intake valve will float a little BEFORE THE EXHAUST VALVE does. That gives you an extra margin of safety should the engine over rev as the intake will be tossed off the cam lobe when the piston is further down, resulting in backfires but no valve-to-piston contact, whereas if the EXHAUST valve hangs open when the piston passes thru TDC ugly things start to happen when pistons contact the exhaust valves.
Last edited by THE FRENCHTOWN FLYER; 11/03/14 11:56 AM.
