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67 Charger Alternator Replacement help

mr carl

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I am looking for help and advice on selecting a new alternator for my 67 Charger project. Knowing this car is so very different electrically, I do not want to make any mistakes with a new altenator. Should I stick with the common 60amp replacement with external regulator or is it wise to move up to a 100amp single wire internal regulator? Please let me know your recommendations.

Carl
 
I hope others chime in. I just upgraded to the 100 amp single wire using 8 gauge wire to replace my 60 amp. I was so advised by a master mechanic to make the swap.
 
Just don't put on a higher amp alternator without upgrading the wiring.
 
Thanks Guys...appreciate the information. Not sure yet which direction I will go. There is a 75 amp aftermarket available (external regulator). Would this also require wiring upgrade or will the factory wiring handle the upgrade?

Carl
 
Thanks Guys...appreciate the information. Not sure yet which direction I will go. There is a 75 amp aftermarket available (external regulator). Would this also require wiring upgrade or will the factory wiring handle the upgrade?

Carl
If you don't have a heavy draw all the time (elect fan, A/C, thumpin' stereo) you probably can use existing wiring, but it's not that hard to run a larger wire from the alternator post to the starter relay. But I wouldn't run a heavy draw like that through the ammeter.
 
I know things change once you go above 60amps. I read above 60 they recommend a heavy guage bypass wire to the starter from alternator I believe. I think I read that from some Painless wiring instructions.

I talked about this in another thread, but a new harness is the best upgrade you can do. When I started to add things like a higher output alternator and new gauges, it stressed the 40+ year old wiring and I started having major issues so I ripped it all out and replaced it.

with a new 14g wire harness, I have a 60amp alternator with external regulator. I believe I used 8g wire for my alternator feed, and 4 gauge to my starter from battery. Works great. But I also have nothing going on like no electric fan or windows, no radio, no electric fuel pump. It's all pretty basic. Who needs a radio when you got duel flowmasters dumping under the car haha.
 
I am using the original amp gauge with a modern 100 Amp alternator. Upgraded wiring. The original amp gauge is a heavy build, it can handle big currents without problems, nothing in it can break easily. The only potential issue is too thin wiring to the amp gauge, dirty/loose connections at the amp gauge, or broken insulation at the studs...
 
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I always like to replace a faulty stocker with a TuffStuff 100A that uses the factory regulator if the car is to look somewhat stock. It's a good idea to run a wire from the main output stud on the alternator straight to the battery, effectvely bypassing the AMP gauge. It's not 100% required if you don't have a big stereo, electric fuel/water pump, etc. but always a good idea.
 
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