Pulley sizes

[panel]

What size pulleys are there on a stock 911 crank and alternator.Are there different sized pulleys available for either?

[makaio]

I don't know the actual diameters, but i do know a few people that run larger pulleys on the fan, to reduce air cavitation at high rpms's.

I know S-Car-Go Racing does this to 3.0 and 3.2 L motors that see a lot of track use.

[panel]

Originally posted by makaio
I don't know the actual diameters, but i do know a few people that run larger pulleys on the fan, to reduce air cavitation at high rpms's.

I know S-Car-Go Racing does this to 3.0 and 3.2 L motors that see a lot of track use.

I'm looking to either go bigger on the crank or smaller on the alt size pulley.

[jluetjen]

Check out this thread for more information on fans and pully ratios.