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## Shift Points Calculation

Enter your gear ratios and other basic information and the Speed-Wiz Shift
Point Calculation will tell you what the ideal shift points are to keep the
transmission output torque to the drive wheels at its maximum.

Enter your engine's torque peak and redline and your car's driven tire
diameter, differential ratio, and transmission gear ratios. In the Shift at box, the calculated shift points are automatically entered, but you can
enter different shift points if you wish to specify them. These shift points are used to
simulate acceleration in the acceleration table and the acceleration plot.

Press the Reset button to automatically set all of the shift at settings to
the calculated shift points. Shift points can be calculated by
torque curve or
by torque peak RPM you enter. Of course, calculating using the entire
torque curve is more accurate than just using the torque peak because most
torque curves are not symmetrical.

Optimize your shift points to keep your
transmission output torque as high as possible throughout your acceleration. You may be surprised
when you find that running to redline is not always the fastest way to
drive.

Shift points graph

Shift points combined
graph