The Ford Barn

mike657894 · 02-11-2016, 12:12 AM

im switching over to twelve volt. gm alternator switching to negative ground. do i need a different condenser for 12v? and if so what would be a good replacement.

Y-Blockhead · 02-11-2016, 12:42 AM

I'm using the original style "short proof" condenser with 12v. It's doesn't seem to care...

quickchange · 02-11-2016, 01:39 AM

A condenser is a condenser , no such thing as a 6 volt one or a 12volt one , Just remember if its from down under , too turn it up the other way, then it will work,

Mike V. Florida · 02-11-2016, 04:02 PM

The voltage to the points is the same 12v battery or 6 volt battery. That's why one coil uses a resistor one does not.

johnbuckley · 02-11-2016, 04:51 PM

Quote:

Originally Posted by quickchange

A condenser is a condenser , no such thing as a 6 volt one or a 12volt one , Just remember if its from down under , too turn it up the other way, then it will work,

Yep, and the electricity flows the other way round in the coil

MikeK · 02-11-2016, 06:40 PM

Sponsored Links (Register now to hide all advertisements)

The capacitor carries two ratings: capacitance in micro-farads and insulation breakdown, in volts.

The capacitance rating is selected to match the inductance of the coil, creating a resonant circuit when the points open.

The capacitor's voltage rating must exceed the reverse EMF created during the collapse of the coil's magnetic field, generally in the 70 to 100 volt range for a typical iron core ignition coil. The actual applied voltage during buildup of the coil magnetic field (6V, 12V) has nothing to do with the peak reverse EMF voltage. That is strictly a function of coil design which is a variable and the velocity of a collapsing magnetic field which is relatively constant.

A typical Kettering ignition capacitor has a breakdown voltage exceeding 200V.

02-11-2016, 12:12 AM	#1
mike657894 Senior Member Join Date: Oct 2015 Location: Bay City Michigan Posts: 1,050	what condenser to use when using 12v im switching over to twelve volt. gm alternator switching to negative ground. do i need a different condenser for 12v? and if so what would be a good replacement.

02-11-2016, 12:42 AM	#2
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: what condenser to use when using 12v I'm using the original style "short proof" condenser with 12v. It's doesn't seem to care...

02-11-2016, 01:39 AM	#3
quickchange Senior Member Join Date: May 2010 Location: Nelson. New Zealand Posts: 2,009	Re: what condenser to use when using 12v A condenser is a condenser , no such thing as a 6 volt one or a 12volt one , Just remember if its from down under , too turn it up the other way, then it will work,

02-11-2016, 04:02 PM	#4
Mike V. Florida Senior Member Join Date: May 2010 Location: South Florida Posts: 14,054	Re: what condenser to use when using 12v The voltage to the points is the same 12v battery or 6 volt battery. That's why one coil uses a resistor one does not. __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

02-11-2016, 06:40 PM	#6
MikeK Senior Member Join Date: May 2010 Location: Windy City Posts: 2,919	Re: what condenser to use when using 12v Sponsored Links (Register now to hide all advertisements) The capacitor carries two ratings: capacitance in micro-farads and insulation breakdown, in volts. The capacitance rating is selected to match the inductance of the coil, creating a resonant circuit when the points open. The capacitor's voltage rating must exceed the reverse EMF created during the collapse of the coil's magnetic field, generally in the 70 to 100 volt range for a typical iron core ignition coil. The actual applied voltage during buildup of the coil magnetic field (6V, 12V) has nothing to do with the peak reverse EMF voltage. That is strictly a function of coil design which is a variable and the velocity of a collapsing magnetic field which is relatively constant. A typical Kettering ignition capacitor has a breakdown voltage exceeding 200V.