The Ford Barn

Jim · 10-25-2015, 03:52 PM

What ohm resister is needed on 57 272 ignition? Also what voltage is needed at the plus side of the coil. Thanks very much. Jim

dmsfrr · 10-25-2015, 05:48 PM

I've got 3 new replacement ballast resistors and checked them with a Fluke multi-meter:
1 was 1.5 ohms, 2 were 1.7

I also have an older and well used OEM ballast resistor, it measured 1.9 ohms.
Running voltage (not 'starting' voltage) at the coil + terminal should be 8 to 10 volts.
Starting/cranking voltage will be 12v at the coil.

BUBBAS IGNITION · 10-25-2015, 07:09 PM

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1.5 to 1.9 is ok.........

10-25-2015, 03:52 PM	#1
Jim Senior Member Join Date: May 2010 Location: Alto, Tx. Posts: 299	resister What ohm resister is needed on 57 272 ignition? Also what voltage is needed at the plus side of the coil. Thanks very much. Jim

10-25-2015, 05:48 PM	#2
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,725	Re: resister I've got 3 new replacement ballast resistors and checked them with a Fluke multi-meter: 1 was 1.5 ohms, 2 were 1.7 I also have an older and well used OEM ballast resistor, it measured 1.9 ohms. Running voltage (not 'starting' voltage) at the coil + terminal should be 8 to 10 volts. Starting/cranking voltage will be 12v at the coil.

10-25-2015, 07:09 PM	#3
BUBBAS IGNITION Senior Member Join Date: May 2010 Location: SPEEDWAY INDIANA Posts: 4,148	Re: resister Sponsored Links (Register now to hide all advertisements) 1.5 to 1.9 is ok......... __________________ If it Makes Spark, we do it !!!! www.bubbasignition.com [email protected]