What are you guys running for alternator amperage and voltage regulators with the electronic ignitions? I'm interested mostly in 1969 and earlier applications.

60-75 amp. dual field Powermaster with 70's charging system in my 69.

70's square back 2 field terminal alt/flat '70 up reg w the side flats trimmed so it'll nestle neatly in the squarish firewall recess. As far as OE stuff it charges pretty good (ex idle) & only takes 1 extra wire (green)

I am running an MSD box, EFI computer, big electric fuel pump and AC.

Plan A was a Powermaster 75A MOPAR case dual field alternator and flat pack alternator. It worked... barely. Dim lights at idle and just barely kept up when running at night (brights + AC).

Plan B is the 100A big case alternator from my '78 core engine (remanufactured) and flat pack 2 field regulator. Works great, plenty of output but heavy.

If your car is stock except the ignition, the above would be overkill. I understand the electronic ignitions don't like the old points type single field regulator but do get along with the electronic replacements. Your original single field setup with an electronic regulator (common parts store replacement) would work if you don't mind the normal OE dim lights at idle. Upgrade to a 60 or 75 amp 2 field unit would improve the situation. Wiring upgrade and bypass of the charge wire bulkhead connector is strongly recommended above 60 amps... and a good idea with a smaller alternator.

If you want to get away from the dim lights at idle situation completly, the Denso replacements are great. See Mancini. I couldn't use the big (120A) Denso as its not compatible with the AC pulley setup. I also couldn't use the 140A Powermaster adapted GM alternator as it hit my Ed heads. With iron heads it just might work.

Yeah, I was hoping to run a stock amperage alternator or maybe a 60 amp unit with the regular regulator. I ran a 60 amp unit with a regular electronic replacement regulator for a few years with no problem. No discharge at idle, no dim headlights.

When I switched to the electronic ignition I change the regulator to the mopar performance blue one that provides a constant 13.5V. I burned up some wires very shortly after. I went to the parts store and they had a regulator that looked identical to the MP constant 13.5V but it wasnt blue, and it said not to use it with a 60 amp alternator.

Right now I'm trying to find another electronic replacement regulator for my 60 amp alternator. The ones i'm finding all say to use them with a 35 or 45 amp unit, but not 60. Any input there?

Im looking at this one yearnone has, http://www.yearone.com/serverfiles/fbshopmain2.asp?cat=1

I'm not sure if I will have a problem with the 60 amp alternator though? I'm not the best with charging systems, I would think it shouldn't matter. But I saw the other ones listed to not use with a 60 amp and now I'm unsure.

the more amperage output, the better. Amperes are not sourced by alt, if car demands doesn't require it. You can even have 200 amps if you want but if car sucks just 50, alt will source just 50.

You actually maybe have a 500 or more amps batt, and you don't burn anything with that... why? because thats not demanded by the car

We insatalled a complete MSD digital in my sons 62 300 about 10 years ago.It was an MP conversion we did before that.Just changed the reg to a new electronic one.Still had the 62 alt.Cherges fine and he runs a big stereo.Unless you have a ton of elec stuff thats all thats needed.That and the reg just hooks up like the stock points one.We always run the biggest batt we can out in.Mine is 900 CCA his is 1000.Rocky

big batt with "low" output alts is actually non healthy, unless you ARE CONCIOUS about that... need both balanced.

backwards is preferable...

I posted an exposition about this here:

http://www.dodgecharger.com/forum/index.php/topic,62772.0.html

I'm running identical charging systems on the 63 and 69 with MP electronic ignitions. The dual field alternators with the 70's regulators, both work great.