on the equations board, what does it mean by rpms and mph. i know what they stand for but what do i put in? the rmps it redlines at or what? and what mph, 30mph, 50mph??

 

You put in how fast you're going and what the tach reads and so on, and it tells you what your gears are. Or, you put in the engine RPM and the tire size and your rear gear ratio and the ratio of the gear you're in when you're collecting the data, and it tells you how fast you're going.

etc. ....