Re: Alternator pulley ratio

["John Beckett" <saltracer@servusa.com>]

Elon

Recheck the math here. Actually he needs to run about a one to one ratio. At
6000 RPM the alternator will put out plenty of amps.

JB

>
> Since your set-up is pinion driven, the pinion rpm will never be greater
> than engine rpm divided by your gear ratio.  (6,000 engine rpm /3.00 rear
> gear = 2000 pinion rpm). (assuming you transmission top gear is direct or
> 1:1).  Using these assumptions a pulley ratio of 4.25:1 would yield a
8,500
> alternator rpm at the lights.