Pulley Diameters

6pk2goDemon said

Ok, 1st update after initial "test" drive

Took the car for a 10-12 mile drive to get fuel about 2pm today. It was 109* out & HOT !! In town driving & stop n' go traffic with the AC on the entire time. The car reached 210*, but didn't climb any higher :D So far, I'm encouraged with the improvement.

As an added bonus, my digital volt gauge used to drop into the 11s at a stoplight. With the addition of the smaller water pump pulley, the alternator spins faster & stays in the 14 volt range...WIN - WIN

Click to expand...

Glad that changing over to a smaller water pump pulley has helped with the cooling! With a 109* ambient temp running at 210* is doing pretty good!

But, about that alternator. If you didn't change the size of the crank pulley or the alternator pulley, you didn't change the alternator speed. It doesn't matter what the size of the other driven pulleys are or how many other driven pulleys are in the system, the speed is determined by the driving pulley and the pulley being driven. So, all that matters for the alternator speed is the size of the crank pulley and the size of the alternator pulley.