Good morning! I'm in the process of upgrading to a 90 amp alternator on my 63 Dart. To date I have bypassed the amp meter and installed a voltmeter which is working fine. I have installed a Classic Air AC unit (Vintage Air hung up on me!) and since I also need juice for my portable oxygen unit the original alt was just not cutting it. I have researched and have a 90 amp unit picked out but I need help with the voltage regulator. Will the original work okay or do I need to upgrade that also. Don't want to burn anything up if I can help it! Thanks for any info. I have always hated electrical work and wiring problems. Thanks again.

Can you show us exactly what kind of an alternator you installed? That will determine what kind of a regulator you need.

How did you bypass the ammeter? What does your power path look like from the alternator's output terminal to battery positive?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I haven't installed one yet. I have selected one for an 89 Dippy if I can get an early VR that will handle the load. I upgraded to a heavier wire (about the size of a power cable for a lap top) and bypassed the amp gauge by using one side as a terminal post. As you probably know the VR on the early A's has a wire in and a wire out of the little box that screws to the firewall. I just need to know what VR I need for my 63 Dart with the 90 amp alt.

Well, that's easy. Get this one, which will bolt right onto the firewall and the existing wires (ign/fld) will connect directly, without cutting or splicing. Your new alternator will have two field terminals. Connect your existing field wire to one of them. Connect the alternator's other field terminal to ground. It doesn't matter which of the alternator's field terminals gets the field wire and which gets the ground.



You might want to adjust your strategy; see here.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks!