Tough to find a single
alternator that would run at 1800 RPM
and still give me 220 amps. The ones I did find are only internally regulated and are found on firetrucks. So no way of making them multistage for charging
In the end I think the alternator and the crank pulley are going to be the same size. These new altenators put out goobs of amps at just 1500 Rpm. My little Yanmar
will run at 1800 rpm under load, so I think I may have to make the crank pulley the same size or a little smaller then the one on the alternator.
I will be using multi groove belts for the alternators, a serpentine type belt, one belt for each alternator on opposite sides of the crank pulley.
I have the alternators now so I will take pictures of the mount as I build it.
I also will be making water with this unit. I have a Cat 431 stainless pump
that is going to be mounted on the top replacing the origanal alternator. I am biulding my own water maker as well , but that will be a new thread