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Old 10-11-2020, 11:29 PM   #1
Zeke5180
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Default 12v conversion

I'm in the process of converting my 37 model 78 slantback from a 6v positive system to a 12v negative system with an alternator. i looking for advice on which spark plugs and coil to use. I'll continue to use the original distributor which has been rebuilt by Skip Haney.

Thank you for any advice in advance. Stay safe and stay healthy.

John
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Old 10-12-2020, 07:21 AM   #2
bmwillia
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Default Re: 12v conversion

Check out vintageautogarage.com. They should have all the info and parts you need.
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Old 10-12-2020, 07:28 AM   #3
alanwoodieman
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Default Re: 12v conversion

send an original coil to skip and have it converted to 12v neg ground. autolite 216 plugs gapped at 030
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Old 10-12-2020, 10:03 AM   #4
big job
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Default Re: 12v conversion

Another of my wondering's why. I have been accused of going to 12vts by my friends,
nope 6vts pos grd. just bump the button its running. so we need these radios and
other foolish stuff. I put a 12 volt garden tractor batt. in the trunk ran the wires under
the seat floor mats to run a radio glove compartment. These electronics today use very
little juice. Now charge phones listen to tunes plus a scanner. Maybe almost a year before I put the trickle charger on the battery . Also a plus, a solonoid from this 12vt to the 6vt. with a button I can jump the 6vt battery if dead..My feed is 10 gauge wire in witch only used for a moment..
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Old 10-12-2020, 12:04 PM   #5
JSeery
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Default Re: 12v conversion

Quote:
Originally Posted by Zeke5180 View Post
I'm in the process of converting my 37 model 78 slantback from a 6v positive system to a 12v negative system with an alternator. i looking for advice on which spark plugs and coil to use. I'll continue to use the original distributor which has been rebuilt by Skip Haney.

Thank you for any advice in advance. Stay safe and stay healthy.

John
Lot of past post on this topic. The basics are change out all the bulbs to 12v, add voltage drops the the gauges, change out the coil or add a ballast resistor. The alternator takes care of the generator issue. 6v starter will work on 12v or switch to 12v starter.
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Old 10-12-2020, 04:09 PM   #6
oldford2
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Default Re: 12v conversion

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Quote:
Originally Posted by Zeke5180 View Post
I'm in the process of converting my 37 model 78 slantback from a 6v positive system to a 12v negative system with an alternator. i looking for advice on which spark plugs and coil to use. I'll continue to use the original distributor which has been rebuilt by Skip Haney.

Thank you for any advice in advance. Stay safe and stay healthy.

John
The proverbial question....why???
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Old 10-12-2020, 06:28 PM   #7
Pete
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Default Re: 12v conversion

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The proverbial question....why???
Because this is reality TV and if he doesn't get it done by the end of the show, the world will explode.
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Old 10-12-2020, 10:44 PM   #8
texas webb
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Default Re: 12v conversion

Just saw this and glad I swallowed my tea first.
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