The Ford Barn

dick lyons · 07-30-2012, 11:49 AM

hey guys, i have what looks like a53 merc motoer in my 48 coupe. there is no resister. do i or do i not need one?? thanks to all who respond.

FlatheadTed · 07-30-2012, 03:45 PM

Dick if it has the Ford coil then yes, it mounts up near the front of the Manifold .is it on volt ?The true test is put a meter on the out put of the coil .

Henry/Kokomo · 07-30-2012, 04:28 PM

Dick, I think the real answer depends on a number of things. We - or someone - needs to know the voltage and the resistance of the coil (so we'll know if it is internally resisted). Some coils are manufactured with internal resistors and some are not. It pays to do a careful survey of just what you have, first.

Jason in TX · 07-30-2012, 04:33 PM

Does your 48 coupe have a 12V battery in it?

If so, touch an ohm meter to the two posts on the coil. If it is around 1.5 ohm, that is a coil rated for 6V. You should put a resister before the coil. If you have a coil that reads between 3 and 4 ohms, that will be fine for a car with a 12V battery in it.

rotorwrench · 07-30-2012, 05:58 PM

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The original late 40s & early 50s FoMoCo cars with 6 volt systems and round can coils didn't need a ballast (8BA, 337, OHV 6 & 8 cyl cars). On 12-volt, it would need a ballast like the 56 & later FoMoCo products had.

07-30-2012, 11:49 AM	#1
dick lyons Senior Member Join Date: Jul 2012 Location: middletown, delaware Posts: 109	ignition resistor hey guys, i have what looks like a53 merc motoer in my 48 coupe. there is no resister. do i or do i not need one?? thanks to all who respond.

07-30-2012, 03:45 PM	#2
FlatheadTed Senior Member Join Date: May 2010 Location: Auckland Posts: 4,705	Re: ignition resistor Dick if it has the Ford coil then yes, it mounts up near the front of the Manifold .is it on volt ?The true test is put a meter on the out put of the coil . __________________ http://www.flatheadted.com Flathead Ted brake Floaters ,

07-30-2012, 04:28 PM	#3
Henry/Kokomo Senior Member Join Date: May 2010 Location: Kokomo, Indiana Posts: 1,731	Re: ignition resistor Dick, I think the real answer depends on a number of things. We - or someone - needs to know the voltage and the resistance of the coil (so we'll know if it is internally resisted). Some coils are manufactured with internal resistors and some are not. It pays to do a careful survey of just what you have, first.

07-30-2012, 04:33 PM	#4
Jason in TX Senior Member Join Date: May 2010 Location: ⓉⒺXⒶⓈ Posts: 2,047	Re: ignition resistor Does your 48 coupe have a 12V battery in it? If so, touch an ohm meter to the two posts on the coil. If it is around 1.5 ohm, that is a coil rated for 6V. You should put a resister before the coil. If you have a coil that reads between 3 and 4 ohms, that will be fine for a car with a 12V battery in it. __________________ -------------- Drive it like you know how to fix it! DMAFC / OILERS CC-MC

07-30-2012, 05:58 PM	#5
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,426	Re: ignition resistor Sponsored Links (Register now to hide all advertisements) The original late 40s & early 50s FoMoCo cars with 6 volt systems and round can coils didn't need a ballast (8BA, 337, OHV 6 & 8 cyl cars). On 12-volt, it would need a ballast like the 56 & later FoMoCo products had.