You dont want to know what pinion to use with a different motor?
Your manual should state best pinion for each wind.
I try to base my pinon's on a number of variables which include
from that you can pretty much figure out anything you need to know with some mathmatics, but as I stated in a previous thread
Motor RPM ???
Most motor manufactures dont state rpm, so your stuck like the rest of us, but 10 pinons and try em out.