The Stovebolt Site Forums The Shop Area The Electrical Bay adding resistor when switching from 6v to 12 v

I know i need the resistor in the wire from ign to coil. I'd rather not mount it to the firewall because it gets hot and my mess up the paint.
Does anyone have an alternate method of mounting the resistor?

thanks
rolf

they've always been firewall mounted without messing up the paint, the ceramic block is designed to avoid that, and on the firewall is the best place for dissipating the heat - do NOT try to 'hide' it someplace where it could be a fire hazard

Bill

Why don't you just buy a coil with an internal resistor and bypass that very non-original looking block on your firewall?

thanks guys.
I'll get the coil with resistor. (I didn't know there was such a thing!)
I'm assuming I can get it at NAPA

rolf

I bet they will scratch your head at NAPA or just about any FLAPS when you ask for that coil.

Here are some part numbers (maybe other people will help by posting other brand/part-numbers).

http://vwparts.aircooled.net/12V-Bosch-Blue-Coil-with-Mounting-Bracket-00-012-p/00-012us.htm

Maybe a NAPA IC14-SB will work (the price is right)?

By using the internal resistor 12v coil, you get a cleaner appearance (more "natural" 6v appearance), but you lose the ability to wire for the hotter 12v current while cranking the starter.

Most of the Stovebolt vendors sell them as well, mine works great. I run a 12-volt generator and a rebuilt original 6-volt starter from NAPA. Zero issues and no block on my firewall. Personal preference but I don't like the look of them and I never will. I bought mine from Jim Carter, EL-158 for about $40.
Quote from JC catalog "This item is a traditional round 12 volt coil but has a built in reducer. Eliminates the need for outside reducer EL181 when changing to a 12 volt system, includes mounting bracket....Can be used on 6 cylinder engines from 1937 - mid 1955 when the 6 volt system is changed to a 12 volt. (Remember the ignition points in even a 12 volt system will only operate on 6 volts, through the 1970's)...Sold each...Made in USA." I was able to just slip it in my original bracket. Patrick's Antique Auto offers one in chrome for the same price.
Here is a picture of mine wired in. I am unclear on why there would be starter issues, I turn on the key, pump it twice, hit the foot starter, and as Jackie Gleason said "away we go." When I wired my truck I did not use any resistors. Converted heater to 12-volt motor, gas gauge is aftermarket 12-volt as well. I now have two years and 2,700 miles on this sytem. Good Luck!
http://www.flickr.com/photos/advance-design_parts_co/8129182431/in/set-72157631867396207

Jim Carter truck parts sells them also.

Mine has an alternator and 6v starter. the heater motor is 6v is there a way to convert it? Brad what carb is that?

rolf

It will work with the alternator and the starter. You will have to have a resistor if you keep the heater 6-volt no matter what coil you use. It is a Rochester, the engine is a full-pressure 1954. You will notice the wiring from the dash is one wire to the coil, the other large wire to the starter. The other coil wire goes to the distributor.

Rgie, the Napa internal resistor coil #IC14 is the only way to go. I use them on old tractors that have been converted to 12v. Think the last one I got from my local Napa was twenty something bucks.