Camshaft Calculations

Speed-Wiz features two separate camshaft calculations. They differ only in the way in which the cam's basic profile event positions are specified; allows you to enter valve opening and closing points are used in the first calculation, while duration and lobe center angles are used in the second cam calculation.

The cam calculations feature an optional full cam profile - a list of lift heights (at the lower left of the window) in which you can enter detailed specs about a cam's lobe profiles. Although the entries in the example are multiples of 5, Speed-Wiz allows you to specify any number for the crankshaft angle.

Camshaft calculation 1

Camshaft calculation 2

A full cam profile can be generated for you based on the opening and closing points (or lobe center angles and duration) and lift heights that you specify, or you can enter your own measured or existing data. Graphs of both the cam lobe profiles (lift heights) and the acceleration and deceleration rates are available.