I ran the numbers through and here's what I get.
I got 0.625:1 pulley ratio.
input shaft to bevel gear is 2.538:1
1.692:1 output to axle ratio.
Total reduction ratio not including the shifted gears is 2.683935:1
1st gear is 2.4375:1
2nd gear is 1.619:1
3rd gear is 1.2:1
Total drive ratios in each gear will be:
1st is 6.542:1
2nd is 4.345:1
3rd is 3.221:1
The ratios sound right. But plugging them in to get MPH using what stvn_VA posted, I still get some seemingly odd/large numbers.
41.544mph 1st gear.
62.55mph 2nd gear.
84.378mph 3rd gear.
As a machinist and CNC Programmer, I have brainwashed myself into enjoying doing math stuff like this. Probably because of what it's getting used for....
Your numbers are right!!!!!
I think 32.48 MPH is kinda fast for a 10:1 ratio as in the example. Check your numbers again on the tranny to axle ratio, should be around 1.7
For the example given the 32.48mph is right!