Quote Originally Posted by s1795so2 View Post
Whoever told you that, or built your alternators didn't know what they were doing. Almost all aftermarket h/o alts put out at least stock numbers at idle, some are slightly lower than stock and some are higher than stock, but they do at least charge. The reason why you raised the "idle" to 1200 is because that is usually right around cruising rpm, and h/o alts are designed to put out the big power at cruising speed.

Look at these eBay Store - Alternator: High amp: iraggi, factory replacement, this guy is who 50% of pro sound off competitors use currently, and I used him when I was competing with my silverado's in the pro unlimited class the past 8 years.
Sorry guys no pics of that because 1 it wasn't pretty and 2 the box at the time was pretty much a classified design.
I got mine from Pheonix Gold, and they always said they need to up the revs to turn on (keep in mind a stock alternator doesn't reach full output until about 1500 rpm's which is why underdrive pulleys kill voltage output) I retired in '96, but still deal with the stuff constantly. Pac and periphrial are not in any way related (I was a rep for periphrial at one time)