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Subject: coil

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Luke Hardee    Posted 03-16-2020 at 19:33:41 [URL] [DELETE]        [Reply] [Email]  
  • coil
  • How would I change a front coil to a can coil on a 1949 ford 8n this site had a diagram a few years ago on how to do it but I lost it somewhere if someone could repost it I would appreciate it.

    K.LaRue-VA    Posted 03-18-2020 at 19:19:39 [URL] [DELETE]        [Reply] [No Email]  
  • Re: coil
  • Here's a photo of half a spark plug used to create the external coil wire terminal. The hard part is removing enough of the innards to solder a piece of wire from the metal post in the spark plug to the flat spring terminal that goes to the cap.

    A guy named Alvin from Georgia sent me this with the following instructions:

    "The spark plug could be moved to the side or top to get more fan clearance. After cleaning out the coil can I lucked out and still had the wire for the points spring attached, I spliced with a wire long enough to extend about 2" higher than the top of coil can with a eyelet on the end. Put spark plug in lathe and removed all metal only leaving porcelain. Broke away part covering the electrode. Soldered a wire with eyelet on end. Drilled out rivet holding hi tension bracket to bottom of coil. This left a hole just right for a 6-32 screw thru bracket, thru bottom of coil, thru wire eyelet and nut on inside to make connection and hold every thing together. Drilled hole for a tight fit of spark plug to prevent leaking when filled with black 2-part polyurethane potting material. Only takes about 15 minutes to set up."

    TheOldHokie    Posted 03-17-2020 at 06:12:54 [URL] [DELETE]        [Reply] [No Email]  
  • Re: coil
  • Pertronix 1247XT. Or you can keep it points and roll your own cap. Bob had a nice description on YT but the links to the pictures in the post are dead now. A lot of folks simply gut the old coil and solder a HT lead on to it for the output from the round coil.


    TheOldHokie    Posted 03-17-2020 at 06:31:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: coil
  • I see YT is now selling the Pertronix bits individually:

    1247XTPLATE - cover
    1247XTERM - HT terminal
    1247XTCAP - cap.

    Total is $60. The cap is half of that. You can modify your old cap by drilling and tapping it for the terminal.


    Tom    Posted 03-17-2020 at 18:20:01 [URL] [DELETE]        [Reply] [Email]  
  • Re: coil
  • Do you have any information on drilling the cap. I assume the terminal must connect to the center contact for the rotor.

    TheOldHokie    Posted 03-17-2020 at 19:27:53 [URL] [DELETE]        [Reply] [No Email]  
  • Re: coil
  • I do do not. Best guess is a small threaded hole in the post that normally contacts the spring on the OEM coil. You will also have to relocate the condenser - it wont fit under the Pertronix cover plate.


    Tim Daley(MI)    Posted 03-17-2020 at 05:11:24 [URL] [DELETE]        [Reply] [No Email]  
  • Re: coil
  • HiYa Luke-
    First, you mean the distributor change, but both setups use different coils too. The Front Mount uses the square can coil and the Angle(Side) Mount Distributor uses the more robust round can coil. As far as attempting to change over, I advise not to -it's not worth the hassle nor the money and time spent, in my opinion. You could swap out engines cheaply and easily, or even just get yourself a later model 8N.

    From Kirk(NJ)';s archives:

    "Not easy:

    It's more than just changing the front covers.

    The side mount engine block has two bolt holes in the left side where the generator mounts. You will need to create a generator or alternator mount from scratch. The oil filler neck and oil filter may get in your way, they were moved on the side distributor engine to make space for the generator. You will need a replacement water pump unless your engine already has the universal replacement water pump, the backing plate is different. Wiring is slightly different but not too hard to figure out. As others have said, it's far easier to just find a complete side-distributor engine and swap everything with the engine it fits.

    After all that, what have you gained? A more durable coil design, YES, but I find the side distributor is actually harder to work on.

    I'll add to that the generator will need to be fabbed for LH installed on and the Oil Filler neck changed -if there is room. Is there something wrong with the current front mount?

    Tim Daley(MI)

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