ok, let me get this right.... i was doing the math and was wondering if my calcs were right..... am i really gonna need at 30(plus)t
to get this result
i am using the fomula spur divided by pinion =x then 27000 divided by x = head RPM

am i even close??? i don't know enough (not running still settin up) about the specs yet to use the link you gave on the other thread