CavemanCharlie wrote:
Chuck_thehammer wrote:
please reread my post.
I am a retired auto mechanic (43 years) I have personally rebuilt hundreds of alternators.
alternators need to spin at 3,500 rpm's not engine speed...
Go to an auto parts store and ask to see a rebuilt alternator.
it should have a tag. stating output, and turn on speed..
remember most alternators spin at 2 to 2 1/2 times engine speed.
so Idle is 800 rpm's x 2 = 1,600 rpm NOT fast to power..
so engine speed is 1,500 rpm x 2 = 3,000 maybe 50 percent output of alternator.
you do not have to believe me .. go look at rebuilt TAG.
and for the 7 pin trailer connector charging battery.. look at the size of wire for the 12 volts battery at plug... WAY to small to fast charge a trailer battery.
You rebuilt alternators?? Heck, ever since GM came up with the alternator that had the voltage regulator inside of it I didn't think anybody rebuilt them anymore. Just swapped them out and sent the old one back. If you have a modern 100 amp (or more) alternator wouldn't you be getting 50 amps out at idle then?
My first car had a 40 amp alternator at max output. A 60 amp was the heavy duty version back then. I had a buddy that had a older pickup that still had a 6 volt generator and battery on it.
Thank You,
I worked for a shop, we rebuilt alternators, starters, generators and carburetors in-house. till early 90's...
first alternator in the US.. was 1963 Chrysler/Dodge/Plymouth .
and I did rebuild many 6 volt generators and 12 volt generators. .. clean contacts and adjust old type voltage regulators... 6 & 12 volt.
and we (I) also rebuilt complete engines .. just sent out block for machine work.
they now call that "OLD SCHOOL"
