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12-12-2010, 08:51 PM | #41 |
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Re: Advice to change 6 volt to 12 volt Model A
Well I changed mine for a more modern ignition. I understand the 6V system and its bennefits well. But I still needed the 12 volt for the Mallory. I used a GM alternator, big pulley and changed the light bulbs. merely switched the cables around. Took about 2 hours. I had already re-wired the whole car, this should be a step for you as well. When you order a harness make sure you use the 6-volt stock set up. It's heavy wire and 6 volt wiring is always heavier and typically better quality because of it. That right there may solve your issues if you are using stock original or very old corroded wiring.
Having said that, the old 6 volt worked just fine before I wanted to change the ignition. It's really mox nix either way. Your headlights are brighter on 12 versus 6 but that's about it. Tim |
12-12-2010, 08:54 PM | #42 | |
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Re: Advice to change 6 volt to 12 volt Model A
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Tim Love your avatar. |
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12-12-2010, 10:41 PM | #43 | |
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Re: Advice to change 6 volt to 12 volt Model A
Quote:
If you have the 2010 Brattons catalog, look on page 65 , upper center column and you will see the new 60 amp armature. The part number is 15002 and the price is $75.00 . The field coils are listed on page 68 . The Fun Projects voltage regulator WON'T work with the 60 amp set up. The Peterson band style regulator will probably work but the connections are CLOSE. You could call Brattons info number for their recommendations. The info number is (301) 829-9880. Good luck. |
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12-13-2010, 08:36 PM | #44 |
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Re: Advice to change 6 volt to 12 volt Model A
Thanks for the info, Purdy.
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12-16-2010, 11:20 AM | #45 |
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Re: Advice to change 6 volt to 12 volt Model A
I was talking to a guy in my guard unit and his brother went to a place that can rebuild a Model A gen. as a 12v-allegedly. All this apparently in the same case. Now, keeping the gen. the same I assume I would just have to change the bat./coil/and bulbs, right? I assume (I still have to check this lead out) that it would be a positive ground. What about the horn, do I still need to reduce the voltage?
If I am following the post correctly, the only benefits are:faster starts, faster charging and brighter lights is that correct? What about rebuilding the generator so that it puts out 7 or 8 volts? Just enough to give it a little more oomph? Mike
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12-16-2010, 12:28 PM | #46 |
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Re: Advice to change 6 volt to 12 volt Model A
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The advantage of 12 volt is faster cranking, brighter lights and readily available parts such as batteries, bulbs, battery cables, and coils. The stock model A generator will charge 6, 8, or 12 volts without any modification but will put out less amps unless the armature is changed. I am running a stock generator in our roadster on 12 volt. With this 12V setup I use the Fun Projects can style voltage regulator, this setup will charge 8 to 10 regulated amps. This is plenty enough amps for the brighter Austrailian halogen bulbs and faster cranking. Fun Projects also sells an 8 volt regulator if a person chooses to go that route. Eight volt batteries are more expensive and harder to find and really sets the hair on some of the die hards a$$es, even worse than the 12 volt conversion. If you change over it is best to keep it a secret, most will never know unless they see the battery, because there is NO other visable changes. You can get the Austrailian halogen bulbs in 6V but they cost more and don't last as long, these bulbs are brighter than the 50 candle power original type bulbs but not nearly as powerful as the Quartz halogen bulbs that can be used with the 60 amp set up. |
12-16-2010, 01:33 PM | #47 | |
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Re: Advice to change 6 volt to 12 volt Model A
Quote:
People say you must be scared when you down Main street with mechanical brakes. I usually do not reply. I think a lot of the remarks about the old ways is generated by people that never did maintenance on the their cars in the old days. I might buy an alternator if they looked like the original generator or the power house generator but probably not. I am glad that people ask why and I always like new ideas. I am running a Yapp two port head so I probably should not be talking. I think the reason a lot of people want to change stuff is because somebody criticized their car and hurt their eagle. I have some friends with some expensive cars (150.000 to 200000) built by some custom car builder. They will be at car show and my primered model "A" gets more attention then their cars. I answer more questions and meet more people than my friends. They usually get a trophy of some kind and I never have received an award, but I get the satisfaction that I did all the work myself and I actually stole the show. What is really funny is when I do not enter the show and park off the show grounds and there will be a crowd around the model "A".
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IF IT CAN NOT BE FIXED WITH BLASTING WIRE, JB WELD OR DUCT TAPE ---IT CAN NOT BE FIXED Do not get me started on the stupidity of ethanol. I think one of the monitors is from Iowa and he will delete the thread. Last edited by sturgis 39; 12-16-2010 at 01:57 PM. |
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12-14-2013, 02:55 PM | #48 |
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Re: Advice to change 6 volt to 12 volt Model A
Does any one have a wiring diagram for 12 volt alt in 1930 Model A. No other mods made to electrical system
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12-14-2013, 03:20 PM | #49 |
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Re: Advice to change 6 volt to 12 volt Model A
The only change to the original wiring will be to reverse the wires at the ammeter and coil. The reason for this is because the 12 volt alternators are negative ground and the battery must also be hooked up negative ground.You will need to use a ballast resistor if you use your present coil. I use a 3.0 OHM coil for my 12 volt conversions because it is internally resisted and needs no ballast
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12-14-2013, 03:37 PM | #50 |
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Re: Advice to change 6 volt to 12 volt Model A
I just love it when three year old threads filled with opinion and misinformation come bubbling back up to the top! I wish there was a 'legacy closing timer' or something so very old threads would become read only.
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12-14-2013, 03:40 PM | #51 |
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Re: Advice to change 6 volt to 12 volt Model A
Don't it's not nessary! |
12-14-2013, 06:13 PM | #52 |
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Re: Advice to change 6 volt to 12 volt Model A
Sometimes it ain't so much what a person needs. It can just be what they want and only they should have the right to decide!!!
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12-14-2013, 08:39 PM | #53 | |
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Re: Advice to change 6 volt to 12 volt Model A
Quote:
My neighbor still thinks for a Model A to be a reliable touring car it needs to have a Chevy 350. |
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12-14-2013, 10:11 PM | #54 |
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Re: Advice to change 6 volt to 12 volt Model A
They don't have to be changed . I've drove them six volt for years. I just wanted to do our roadster 12 volt because its such an easy conversion. It uses all the original parts except the battery. Voltage regulator, barrel starter drive and 3.0 ohm coil are all options. It can be changed back to six volt , mostly by changing batteries and bulbs and as long as it remains positive ground,not a single wire will have to be changed. This is all a real novelty for me and has been for the past several years. My other cars are still six volt.
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12-15-2013, 02:33 PM | #55 |
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Re: Advice to change 6 volt to 12 volt Model A
had my 30 for 12 years, changing to 12 volts 5 years ago was a good change,it is saving me time and money
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12-15-2013, 04:26 PM | #56 |
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Re: Advice to change 6 volt to 12 volt Model A
If you run a wire across the terminals of the ammeter some of the current will go through the wire and some through the ammeter. I run a 10 gauge wire in case the ammeter fails and all of the current goes through the wire. Depending on your wiring diagram you might be able to do this at the terminal box on the firewall. Your reading will be low but it will be cheaper and you can keep the original ammeter. And in conclusion I agree with the other posts, forget the electric heater.
Charlie Stephens Last edited by Charlie Stephens; 12-15-2013 at 04:33 PM. |
12-16-2013, 05:16 PM | #57 | |
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Re: Advice to change 6 volt to 12 volt Model A
Quote:
Hmm, I think that he meant...more reliable...in which case ! I know a very smart ....older than dirt gentleman (auto mechanic/inventor/machinist and teacher!) who was wacko about ford flatheads...as in he knew it all ..for real ! He had a dozen V12 flatheads, including the one he rebuilt that was in his stunning '41 Lincoln coupe. He and family toured long distance. Eventually , he replaced the V12 with a Chev 350. When asked WHAT THE HECK...he smiled and said..'reliability' . I thanked him, as I have that flathead V12 now |
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12-16-2013, 11:58 PM | #58 |
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Re: Advice to change 6 volt to 12 volt Model A
I agree this thread is 3 years old like you said.
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