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Increasing the gap will, in theory, decrease the Amp capacity of the alternator, but in practice, an increase of 20 thou, will be insignificant.Assuming that the magnetic Flux decreases at the square of the distance from the stator (I am not sure if this is the physical law, but it is reasonable), and if the stock rotor diameter is 3 inches (just guessing), then the ampacity will decrease by (3/3.02)pwr2 = 0.987, or less than 2%!Slick
Increasing the gap will, in theory, decrease the Amp capacity of the alternator, but in practice, an increase of 20 thou, will be insignificant.
Assuming that the magnetic Flux decreases at the square of the distance from the stator (I am not sure if this is the physical law, but it is reasonable), and if the stock rotor diameter is 3 inches (just guessing), then the ampacity will decrease by (3/3.02)pwr2 = 0.987, or less than 2%!
Slick
