63-66 Imperial disc brake conversion

Imperial

  1. VintageSpeed

    VintageSpeed New Member

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    Hi

    I just wanted to share my Imperial disc brake conversion to you since I did not find much information about this online. This should work for 63-66 Imperials.

    It did some time to measure and parts catalog searching but here is the result. This conversion is using Scarebird brackets as a base but you can make your own brackets if needed.

    You need to have double washer between outer wheel bearing and nut to get the bearing tight and 0.30 inch spacer between wheel and disc if you use OEM 15" drum style steel wheels.

    So not a direct bolt on but better than nothing and this setup keeps your original 5x5.5 bolt pattern.

    Parts list:

    Adapter plate - Scarebird MON D12 63-64 Chrysler&Dodge

    Wheel seal- SKF 18415 56-73 Chrysler Imperial (Fits with a bit fiddling)

    Disc - RAYBESTOS 76446R, 94-99 Dodge RAM 1500

    Caliper - RAYBESTOS FRC4418 & FRC4417, 94-99 Dodge RAM 1500

    Brake pads - RAYBESTOS PGD369M 94-99 Dodge RAM 1500

    Bearing - SKF BR5 (ínner) ja BR3 (outer)

    Brake hoses: ACDELCO 18J444 & 18J602 86 -91 Cadillac Eldorado

    Master cylinder: RAYBESTOS MC36307 71-73 Chrysler Imperial

    [​IMG]

    [​IMG]
     
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  2. twostick

    twostick Senior Member

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    What hub are you using?

    Kevin
     
  3. VintageSpeed

    VintageSpeed New Member

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    OEM 63 Imperial drum brake hub.
     
  4. bigmoparjeff

    bigmoparjeff Senior Member

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    I think you mean that the spindle is OEM Imperial and the hub is part of the new Dodge pickup rotor.

    rotor 1.JPG

    Great job, by the way. :thumbsup:

    Thanks for the detailed info.


    Jeff
     
    Last edited: Jul 7, 2020
  5. VintageSpeed

    VintageSpeed New Member

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    Yes, sorry I didn't even think it as a hub since that rotor is one machined part without separate hub.

    You could use also the hub from the orginal drum brake and make it fit with 4wd Ram rotor but then you need to check caliper to rotor clearence.
     
  6. garyh

    garyh Well-Known Member

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    How many miles have you driven with this conversion ? Issues ?
     
  7. marko

    marko Well-Known Member FCBO Gold Member

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  8. Scarebird

    Scarebird New Member

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    mnnh. unless I am mistaken we did not design that bracket to work with the components you used. Current main components are 1977 Cordoba rotor and Celebrity caliper (so it fits in a 4" rim). we also include a pair of bearing spacers too.

    That said, we have been pestered for a decade to build a 63-66 Imperial disc conversion - if somebody has a spare spindle we can take a look.

    Mark
     
  9. fury fan

    fury fan Senior Member

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    Celebrity? As in Chevy Celebrity?
     
  10. VintageSpeed

    VintageSpeed New Member

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    Hi again

    I see this topic gathered some interest so I give it a bit update.

    I have been driving with this conversion now some 200-300 miles and it works nice. Stopping power is definitely adequate.

    There are some things to consider though. If you are using OEM mopar drum brake wheel you are going to need spacers. I used these Baer 0.375 spacers.

    5 Lug Wheel Spacer 5x5", 5.5"

    OEM mopar drum wheels have this strange concave design and are bolted together instead of weld so they scrape the calibers without spacer. If you have OEM or aftermarket disc brake wheels I do not think this will be an issue.

    Another option is to put on smaller GM calibers like Mark said they are using in their kits. I think this could be also better combination with the RAYBESTOS MC36307 master cylinder. I switched to 2 bolt RAYBESTOS MC39178 master since the pedal felt too spongy and I had already those big RAM calibers.

    [​IMG]
     
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  11. fury fan

    fury fan Senior Member

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    That was an excellent link to wheel spacers, I had looked for a good source for them in the past to attempt a disc conversion on another car, and lack of good spacers was a stumbling block. And made in USA and reasonable price, too!!! Win-win!
     
  12. garyh

    garyh Well-Known Member

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    I have a Good Knuckle (spindle) for sale. '66 Imperial