Starter Gear Pitch

[fl9018]

Just out of curiosity, does anyone know the gear pitch and pressure angle of a late model Ford starter?

 

[tbuelna]

The starter pinion and mating ring gear used on most engines have a huge difference in tooth counts. In order to get them to mesh satisfactorily it requires a significant amount of geometry modification. The starter pinions typically have around 9-10 teeth, and the pressure angle used is low (14.5 deg or less).

Here's an example from Tilton:

http://tiltonracing.com/product/xlt-series-super-starters/