Alternator voltage guage

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Model T Ford Forum: Forum 2014: Alternator voltage guage
Top of pagePrevious messageNext messageBottom of page Link to this message  By Kevin Holland, Utah on Sunday, June 08, 2014 - 04:34 pm:

I just bought from Texas T Parts an alternator for a non-starter/generator 1916 T. It is a single wire set-up. My question is: do I take a wire from the alternator and attach it to one side of a voltage gauge and then on the other side of the gauge to a fuse; and what size fuse, I do not know, and then to the plus side of the battery. Also does anyone know if the magneto will interfere with the alternator, I plan on running the engine with original coils. I just want better headlights for the traffic in an urban area. Any input would be appreciated. Kevin.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Sunday, June 08, 2014 - 04:40 pm:

In case you didn't get the mounting instructions here they are;
http://www.texastparts.com/mm5/manuals/T5119ALT-Ext.pdf
The question should be covered.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kevin Holland, Utah on Sunday, June 08, 2014 - 07:13 pm:

Thanks Mark, But does any one know if an alternator will hurt my mag? Or will the mag hurt my alternator?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Georgetown TX on Sunday, June 08, 2014 - 07:20 pm:

The alternator charges the battery. The magneto runs the ignition. They are not connected in any way. Neither one affects the other at all.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John F. Regan on Sunday, June 08, 2014 - 08:05 pm:

There is little point in putting a fuse in series with a voltmeter since it is a high resistance device that draws almost no current at all. You DO want to have a fuse in series with the battery and the car wiring. That fuse should be 25 amps to protect your car wiring but does NOT include the alternator feed that goes directly from the alternator to the battery hot lead. It is a good idea to fuse that lead too but it should be fused at a higher current.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John McGinnis in San Jose area, CA. on Monday, June 09, 2014 - 08:55 am:

Sounds like the *voltmeter* is the ammeter.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Pat Kelly on Monday, June 09, 2014 - 11:09 am:

I have an alternator on my T and no, it doesn't have any connection or effect on the mag. What you will notice is you have to increase the RPM to reach the "turn on" RPM for the alternator. I still have a ammeter which can easily be pegged after start up, so keep your RPM down until the battery is brought up. I plan on getting a FP voltmeter as soon as I can afford one as well as running a larger fused wire directly to the battery from the alternator. PK


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