[911SCfanatic]

Background: I'm in the middle of a total restoration project started in 2004 and (hopefully) finished in 2007. When I bought the car, which was in terrible disrepair, the alternator light was always on and the PO complained about a slow drain that killed the battery when parked after a few days. The wiring was a complete rat's nest with splices and stripped wires scattered everywhere.

Now: Took the alternator to a place today to be tested. The shop has been in town for 30 years (run by the same guy) and all they do is alternator and starters. They are very respected by the local muscle guys, Shelby owners and other generally high end, American iron. Also, there's no guys in town that do just VW/Porsche etc. so I figured I'm as well off with these guys than with some onesie, twosie European alternator rebuilder. I hope my premise isn't way out of whack.

The young, tatooed kid at the counter couldn't figure out what to do with it since it didn't have a pulley, but the old guy just popped out the key and was able to bench test it just fine. The old guy tells me the alternator is dead and he tells me it has an internal v/r, so I now know its not the original alternator. Other than that, I don't have a clue about this alternator, and quite frankly, didn't really know what else I should know. I told him not to lose the nut because IIRC replacements where hard to find. He's rebuilding it for $150 and giving me a 2 year warranty.

When I pick it up, what do I need to ask/know to make sure it works? I won't be installing it for another 6-8 months. What kind of voltage should it put out on the bench--13.5V at any particular speed (alternator shaft speed)? I assume I should get a current rating from him?