[H. L. Chauvin]

Hi Lopez,

I think you are asking why is it that:

a. With your Model A Engine "A" properly timed with all original stock parts; and,

b. With your Model A Engine "B" properly timed which has the equivalent of a Model B cam with a high compression installed; and,

c. With spark all the way "up" on both, and with the idle setting on the carburetor as low as it can go prior to the engine stopping on both, is it normal that stock engine "A" can continue to run with less rpm's than engine "B"?

That is what I experienced in above reply no.4.