Doug, I understand what you are saying, but I would think that retarding the ignition of an air-cooled engine, especially in the summer, is really tempting fate since it will make it run hot. This is not some theory, it is fact. I would think that a better plan would be to leave it in perfect tune, (timing, mixture, etc.), and just avoid WOT under load. This is my game-plan, and believe me, you can still have PLENTY of fun w/ the car. Good luck.
