Lynn,

 

A toothed belt makes sense. I was thinking ribbed or V.

 

Bobby

Bobby,

 

Lynn mentioned this once but it bears repeating, the crank angle sensor is just that. You must be sure that the angle of the toothed wheel and the e-shaft remain in proper timing! Even a very small variance is bad. Your tolerance would have to stay at +- .5 degrees max. That isn't possible with anything but a toothed belt or direct attachment. (which is much better) I had a brain wave one time and thought if people are getting undersized pulleys made, why not raise a flange on both sides and cut the tooth pattern in it? This would be very reliable and would allow 2 pickups for redundancy. The patterns could be cut at the same angle or 180° or whatever angle allowed the easiest mounting of a second pickup.

Bill Jepson