OP
etpm
Veteran Member
- Joined
- Jun 30, 2021
- Messages
- 2,030
- Location
- Whidbey Island, WA
- Tractor
- Yanmar YM2310, Honda H5013, Case 580 CK, Ford 9N
I like that multi groove belt idea. Easier to machine too. Lots easier. Cars, especially small cars, tend to rev higher than the 2700 max my engine spins. So a small car pump looks even better. I can look at pulley sizes at the wreckers to see if any pumps are being over driven. And it may seem crazy, but why not, that's the theme, but I could go as large as 7.5 inches on the pump pulley without running into clearance issues.Most car pumps Iv seen spin at about crank speed. Your drive pulley on the alternator is spinning almost 2x crank speed. May be ok to run the pump at 2x but ? necessary. Its just more power stepping up through that small pulley alternator drive. If you could find a short multigroove/serpentine belt for the secondary it might reduce the pulley groove depth overhead enough to ease making prudent speed choices. - - More efficient too.
Eric.