90 amp Bosch alternator I'm using for my 8V motor. I upgraded the +12V wires to 4AWG from the alternator to the starter and the starter to the battery. Make sure your grounds are good. Battery to frame and to motor. And alternator to motor.
I recently had two brand new Bosch remanufactured alternators fail. One after six weeks, and one was bad right out of the box.
Have a look at Rockauto.com
They have Bosch remans in different sizes.
If you go for a bigger output alt, add a fat cable between the output and the battery via the starter terminal, as the two wires that carry current to the battery via the starter terminal will then be undersized. The cable cost is minimal.
Buy the Bosch it's a direct OEM REPLACEMENT alternator it's probably still going to need programmed via vcds to allow the computer to adapt to the voltage change of the new alternator
In your case I would say just buy a new replacement alt from a name brand like Delco Remy or Bosch, none of this parts store rebuilt junk, you'll just be doing the job over again soon.
Bosch, Valeo, or Denso would be my top choices. Don't get a Chinese one. Shit won't last at all.
Bosch makes (made) excellent rebuilt alternators and I’d check them out.
I bought a Bosch alternator at O’Reilly’s for ~ $300 and the gaskets at Autozone for ~ $100 (you can get them cheaper but I needed them quickly)
I would use the BOSCH from fcpeuro.com without hesitation.
I replaced my alternator two years ago, and I put in a Bosch, and I haven't looked back. It works great and also has a warranty.
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