The Ford Barn

1931fordmodela · 06-25-2017, 06:27 AM

I have a 26 coupe with a 6 volt alternator conversion. It runs great on the battery, when I switch it to the mag the car turns off. Beings it has an alternator, is this why the mag does not work or it there a problem?

29spcoupe · 06-25-2017, 08:00 AM

If your car does not run on mag, look for lint from the band linings on the mag plug. It might also mean that your magnets need recharging. The magneto does not depend on the alternator for current, it produces its own current. Check the output of the mag with a voltmeter. The mag puts out alternating current.

Royce P · 06-25-2017, 12:04 PM

The magneto doesn't care if the T has a charging system or not. If the car is tuned up properly there is no need for a charging system or battery at all. The magneto only powers the ignition. The magneto does not charge the battery.

Quote:

Originally Posted by 1931fordmodela

I have a 26 coupe with a 6 volt alternator conversion. It runs great on the battery, when I switch it to the mag the car turns off. Beings it has an alternator, is this why the mag does not work or it there a problem?

redmodelt · 06-25-2017, 12:17 PM

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google "mtfca:checking magneto output" to help check to see if the mag is putting out any current. Could be the switch is bad, no contact inside when key is turned. No magnets or mag coil ring installed, maybe. Are you running coils or distributor?

06-25-2017, 06:27 AM	#1
1931fordmodela Junior Member Join Date: Nov 2013 Location: Pitman NJ Posts: 8	6 Volt Alternator I have a 26 coupe with a 6 volt alternator conversion. It runs great on the battery, when I switch it to the mag the car turns off. Beings it has an alternator, is this why the mag does not work or it there a problem? __________________ Mark Papa

06-25-2017, 08:00 AM	#2
29spcoupe Senior Member Join Date: Aug 2014 Location: Rhinebeck, NY Posts: 762	Re: 6 Volt Alternator If your car does not run on mag, look for lint from the band linings on the mag plug. It might also mean that your magnets need recharging. The magneto does not depend on the alternator for current, it produces its own current. Check the output of the mag with a voltmeter. The mag puts out alternating current.

06-25-2017, 12:17 PM	#4
redmodelt Senior Member Join Date: May 2010 Location: Portland OR Posts: 6,342	Re: 6 Volt Alternator Sponsored Links (Register now to hide all advertisements) google "mtfca:checking magneto output" to help check to see if the mag is putting out any current. Could be the switch is bad, no contact inside when key is turned. No magnets or mag coil ring installed, maybe. Are you running coils or distributor? __________________ I know the voices aren't real but damn they have some good ideas!