Hello everyone again I an a question about my altnater it is putting out 19 volts when just running if I reve the motor the volt go to about 24 volts , the voltige regulater is in the side of my bronco, should I go with a interl regulater or not ,
thank you Rick

 

Sounds like your voltage regulator is stuck.

The only advantage of an internally regulated alternator that I can think of is cleaning up extra wiring and the regulator underhood. Depending on what alternator you currently have, upgrading to a high output unit (such as the 130 amp 3G) would be more important. Whether it is internal or externally regulated.
If you are running V belts with a high output alternator, you may run into trouble with slipping belts. You may need to run a dual groove alternator pulley and 2 belts. I run one with the stock routing and the other belt off of the power steering pulley. Solved my problem, but I will be changing it when I install the air compressor.

Jason

 

Yeah the 3G is great and cheap too from the junkyard. I'm running a single belt though and its not quite enough. Its got a little sqeal to it on startup that I can't tighten out of it.

 

I used a dual groove alternator pulley from a Bronco smog pump application. I had to have the back of it machined down to get the correct offset. It works well but I may change to a serpentine belt.

Jason

 

I don't want to Pirate this , but, I am running a large body Ford alternator off of a late 80s, could this be the 3G model youall are refuring to? With dual batteries it has a tendency to want at least 1800 rpm to put out 13.5-14 volts when the batteries are taking a hard charge.

 

This is what a 3G looks like (rear view of it anyways)



Is the alternator you run ext regulated? I used one in a 130 amp version. But I was going through alternators every year. To keep the belts from squealing, I was pulling them pretty tight which proved to be murder on the bearings. When they worked, they worked well. It would charge very near rated amperage. It would keep up easily at idle running my winch for extended periods.

Jason

 

No, the altinator I am running is much largher and externally regulated. Barley fits between the inner fender well and waterpump. I had to modify the brackets. I know it is off of a F series pickup out of the late 80s but don't know if it was a diesel. I think it may just need a smaller pulley but this wouldn't help with the belt slippage problem.

 

The large case alt. I used on my 68 EB was from a Pinto wagon with the V6 and AC. 100 amps of power and ran it for years.