Rat,
You missed an important word in the second line of post #11. The word 'racers'.
Never said, or recommended, that locked ign be used by OEMs.
And have to disagree that a car has 'never' run better with locked ign. Mine does, with 35*. And there are plenty of others, especially race cars.
As to the boxes retarding with rpm that is most likely because of magnetic p/ups being used. As the rpm increases, the AC sine wave becomes distorted & retards the ign. More here:
www.worldphaco.net
