Looking for an alternator

A

AjLinder

New member
I'm trying to find a 150 amp alternator but any one I find is not meant to fit. Does anyone know one that would fit even if its not meant for the car or one with a mounting bracket to work with the car (75 scout ii I4 196 if that helps), thanks!
 
That's a lot of amps for a Scout. Do you have an actual need for that much or is it just a cool number in your head? Before you could safely run an alternator putting out that much juice, your entire wiring harness would need to be upgraded and modernized to handle it. The factory SII harness is barely adequate for a stock 63 amp alternator. That being said, the factory alternator is a Delco 10si, commonly found in elevendybillion GM vehicles produced throughout the 70's. The evolution from that is the Delco 12si which was commonly found in elevendybillion GM vehicles throughout the 80's. Many folks, myself included have performed the 10si to 12si swap on their Scouts. It's nearly a bolt on swap with only minor modifications required. My particular 12si is rated for 94 amp output, and it was a stock, off the shelf unit for some GM vehicle, perhaps a Corvette or some Caddy. I can't recall what it was original to , but that doesn't really matter. Nothing special, hopped up, or hot rodded about it. Back in the 80's that was the highest rated stock alternator you could get for a gas powered GM, because that's all that was needed. I also can't remember if the clocking for the wiring pigtail was in the proper orientation for my Scout or not. Even that doesn't matter as the 10si and 12si units can be re-clocked by simply loosening the case bolts and carefully rotating the back half without letting it seperate from the front half any further than is needed to perform the rotation. Then re-snug the bolts. In the aftermarket, there are vendors who sell modifed "blingy" 12si and even 10si alternators with outputs well north of 100 amps. They ain't cheap, but they can be had via quick web search. You aren't going to walk into your local O-Wrongleez and grab one off the shelf though.
 
CS144 alternator is a very easy swap. You will have to bypass the ammeter with anything bigger than 90 amp. And add an 8 GA shunt from the alternator to the battery or starter post. Plenty of us have done it and there's no doubt writeups here and on binderplanet.com
 
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