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#21
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There HAS to be a difference somewhere. What about the positive wire that you ran from the alternator to the positive terminal block? Check it for continuity? Did you use the same wire on the '62 and '64?
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#22
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Quote:
I meant no disrespect on my 'belt' comment. We (I anyway) don't know what knowledge you have or experience. Sounds like you have a lot! I would add that try turning the headlights and as much power on. Sounds like the alternator thinks it doesn't need to charge?
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#23
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unsolved mystery
This one is for Bob.
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#24
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#25
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Quote:
Another test maybe run the alternator wire to a power post inside the car, like a radio connection or fan switch. (not in addition to the original connection all by itself) The voltage would be lower there probably and maybe make the alternator sense that it needs to charge?
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#26
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If he's measuring 12.3v it should be charging correct?
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#27
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Could be real low since the alts were built for battery maintenance only. Clay |
#28
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I don't have any practical experience with 1-wire alternators but 12.3 doesn't sound like a battery being charged. I thought a B+ when car runnng and alternator excited, it should be up around 13.8-14.2
Sorry, hope I didn't derail the exchange here.
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1968 Firebird IAIIa 522 340 E-heads Northwind with XFlow TBI 4L80E 3.50:1 Rear |
#29
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Voltage does vary. It should pretty much always be above 12.8 I would say. I think you're right about 13.8-14.2 being normal charging range. One key thing to remember here is that he is clearly seeing a noticeable difference in voltage between the two cars.
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#30
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How about swapping batteries along with the alternator? Takes another unknown out of the equation.
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express |
#31
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OK,this has gone on long enough!I have a one wire on my 62GP that I put on years ago.Does anyone want me to take pics of my wires?Only issue I have found is it will not show charging until RPMs get up a touch like 1000.Tom
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#32
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Just my opinion here is a diagram which I consider to be the absolute minimum as far as retro-fit to add a "modern" 10SI alternator into an older 1960s GM car.
I would never attempt put a "one-wire" alternator on any car. It is my understanding that those are made primarily for marine applications, that or perhaps a farm tractor.
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Peter Serio Owner, Precision Pontiac Last edited by Peter Serio; 08-30-2021 at 01:21 PM. |
#33
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Like I said I converted the Delco 1 WIRE alt to 3 WIRE and it works perfectly so I will not be going back to 1 wire. I Only used a 1 Wire alt in the first place because I thought it would be easier. I used them on both my other old cars (1964 GP and 1967 GTO) because most 100+ amp alternators are 1 wire and they needed the additional power. They have worked fine for years now.
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