What's old is new again. Alternator upgrade options

[Zed Head]

I think that the one wires actually have a couple of jumper wires right on the back of the alternator.  Where the L and the B and the S connections are.  They're all connected together then one wire is run to the battery and harness.  So you don't have a charge light and the loads are farther away from the alternator itself.  But it's simple.

Edited July 13, 2020 by Zed Head

[madkaw]

So I got my 12si alternator and didn’t have my mount modified yet , so I did the sketchy mount where you flip the clocking . The beauty is that it bolts right up with one spacer , flipping the adjuster bracket and a longer 8x1.25 bolt . Sucker charged right from idle , which I read might not happen . Might be the way I wired it , but it’s still a one wire set up basically .  Drove it around and it showed 14.5 volts pretty consistently with electric fan and all my other goodies . Haven’t driven at night , but will try that tonight . 
I did get the proper mount modified , so about to try it . I’ll be watching for drains on the battery . 
 

[AK260]

So I got my 12si alternator and didn’t have my mount modified yet , so I did the sketchy mount where you flip the clocking . The beauty is that it bolts right up with one spacer , flipping the adjuster bracket and a longer 8x1.25 bolt . Sucker charged right from idle , which I read might not happen . Might be the way I wired it , but it’s still a one wire set up basically .  Drove it around and it showed 14.5 volts pretty consistently with electric fan and all my other goodies . Haven’t driven at night , but will try that tonight . 
I did get the proper mount modified , so about to try it . I’ll be watching for drains on the battery . 
 

Well done chap, that’s great news and a good result!

One word of caution: I was going to do this 12si thing before upgrading the internals of mine (to output a stable 90A, peak 120A) and researched it to death. Some guys have found that with the way you have it mounted, over time has caused the mounting point on the alternator to crack and fail. I guess it’s under a lot of tension and vibration given the sheer weight of the thing. So try not to leave it too long like that if you can.

[madkaw]

5 hours ago, AK260 said:

Well done chap, that’s great news and a good result!

One word of caution: I was going to do this 12si thing before upgrading the internals of mine (to output a stable 90A, peak 120A) and researched it to death. Some guys have found that with the way you have it mounted, over time has caused the mounting point on the alternator to crack and fail. I guess it’s under a lot of tension and vibration given the sheer weight of the thing. So try not to leave it too long like that if you can.

I only ran around like this for 1 day. modified original mount-so its on solid!