Differences between early and late SC12 superchargers?

**TERRA Operative** · 03-02-2010, 10:22 PM

Ok, just trying to clear some stuff up.

I know the main difference between the early and late (bigport and smallport) SC12 superchargers is the diameter of the pulley (smaller on the late SC12).

What I'm interested in is any differences in the shafts. Ie, are the two pulleys completely interchangeable? I don't currently have an early SC12 to compare with my AE101 SC12, so I can't match them up.

Does anyone know this? (Or can someone take some photos of the shafts?)

Alternatively, if someone has a complete, old, stuffed early SC12 they want to get rid of for cheap, I might be interested. I don't care about it's operation, just the shaft and pulley etc.

**fixeruperer** · 03-02-2010, 10:41 PM

ill get some photos man !! right now. im pretty shaw the shafts are the same.

**fixeruperer** · 03-02-2010, 11:28 PM

18 teeth.

**stepan117** · 04-02-2010, 12:19 AM

yes they are interchangable as i have got 1 of the old style and have fitted the new smaller pulley to it no probs , only diff is pulley ,clutch and coil size