Originally Posted by
onehundred80
Some pics to show others what you are talking about.
35 teeth (3 lobes) and 21 teeth (5 lobes), so the 5 lobe rotates 1.666 (35/21) times faster than the 3 lobes.
The way I look at it - the 3 lober is on the shaft of the 21 tooth gear (front right) and the 35 tooth is on the shaft of the 5 lober (front left).
So if we are running the 3 lober
directly from the the SC pulley at 15,000rpm - then the 5 lober is running at 3/5ths that speed or 9,000rpm -
unless I am missing something.