6 - 12 volt conversion, best way on a Ford

resodziadzu · May 20, 2010

Is it better to replace the 6 volt coil with 12, or use the resistor that comes with the kit and use the old 6 volt coil? Does that resistor get hot, I mean capable if igniting things hot? It sure looks like it's meant to handle heat. Is energy wasted with that resistor, that would be used in making a spark if a 12 volt coil were used????

old · May 20, 2010

You really do need to tell us the model of tractor since ford used 2 different types of coil on some of there models and one of them they do not make a true 12 volt coil for so hard to help you help your self with out a lot more info. Just taking a guess yes you need to resister and yes it gets good and hot. If it has the round type coil then yes you are better off up grading to a true 12 volt coil that does not need a resister

johndiercks · May 20, 2010

if you ask on the Ford 8N,9N,2N forum you will get an authorative reply; or use the archives

souNdguy · May 20, 2010

you left alot of important stuff out.. like 'what' ford tractor.

if this is a ford with a sidemount dizzy.. say.. everything from 51 thru 64.. and you are on 12v.. I'd get a Napa IC14SB coil, and use no resistors.

if this is a front mount N.. then you have some options.

use the newer 12v coils AND the oem dash mounted ballast resistor.. or use the old 6v coil, oem dash resistor, PLUS the new resistor that comes with the kit.

yes the resistor gets warm, it is disipating heat ( wattage ) hot enough to ignite something? maybee I guess.

spark potential at the spark plug is mostly a function of air gap and atmospheric pressure and the specific atmospher in the combustion chamber. for all intents and purposes, a 6v coil and 12v coil both make more than sufficient high voltage to jump the .025 air gap under engine compression pressure.

if it's a side mount.. I prefer the 12v napa coil and no resistor.

if it's a post 65 3 cyl gasser.. it's 12v anyways with a 6v coil and a resistor wire setup ..

soundguy

soundguy

rlp in Co. · May 20, 2010

There is one advantage for using a 6 volt coil and resitor. You can run a wire from the starter terminal to the coil so that when the starter kicks in it will also throw a full 12volts to the coil for a much hotter spark. The resistor gets hot but not hot enough to start fires. You are worried about wasting around 7 to 10 watts of power?

6 - 12 volt conversion, best way on a Ford

resodziadzu

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old

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johndiercks

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souNdguy

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rlp in Co.

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