[Mr. Luos]

A dynograph is a good start. It all depends on how many RPM's you drop each time you shift.
With the dynochart, you can get a decent idea how the curve looks, and at what RPM's your motor is likely to pull the strongest.

Mine....take it until the cam drops off. Old set-up, right at red-line, 6200. New set-up....past redline, 6600.