Pet Peaves in Mechanic's Lingo

ir3333 said

3/4 cam
i had read early circle tracks were 3/4 mi.
a 3/4 cam was one ground to perform on those tracks.
but i don't know myself.

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Funny, I have heard of the 3/4 cam too, but never understood what that means....My dads 66 Cuda has a 273 and when dad was young he had a hotter cam installed, he always said it was a "3/4 racing cam" lol