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Pullies: Mods and Upgrades |
| On the left is a heavy cast steel pully out of my 1978 Porsche 924. The one on the right appears larger, but the belt uses the smaller diameter pully on the back. This results in more power. You can even remove the front pully and just use the back one (below) to reduce even more rotating mass. | 
(Front side) | 
(Back side) |  |  | Here is some shots of the pully (silver)
vs. the pully after it was cut (yellow). You can really tell a size difference as
well as a weight difference.
This results in more horsepower. |  |
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