Disc Brake Conversion

Hello, I'm new here so please bear with me. I am working on a customers 1947 Hudson Commadore 8. He has asked me to install a power disc brake system and I'm wondering if anyone has done this? I think I want to use a street rod pedal/booster/master cylinder kit mounted under the floor (Speedway Motors part #9106005). I am hoping for some guidance to select a kit or pieces to bolt up as far as rotors calipers. Any info will be appreciated. 


  • Jon BJon B Posts: 6,890Administrator
    Hang in there, someone will give you an answer. It HAS been done and someone was selling a kit.  If it's no longer available, someone will have an answer as to how to adapt another car's brakes.
  • 50C8DAN50C8DAN Posts: 1,765Senior Contributor
    ABS is the only disk brake setup I am aware of still available for Hudsons.  I bought the kit for my '54 but it is a bit cold to get it on.  I believe that pre 48s can use this kit, but may need a spacer.  I know that this has been discussed here recently so someone will come along with the info:

  • Ol racerOl racer Posts: 2,458Senior Contributor
    edited January 2018
    '48 - '54 Disc Set Up are same fitamint, '37 - ''47 needs one Brg swapped but virtually same up to '54 too. Ive updated many Hudson Brake systems now, (even though Hornet really dont need it) just more as a challenge. Under floor Drum/Disc need a red 2lb Residual valve.

    I installed a Torino Dual Master in my '47 while retaining the whole secondary Emergency Brake System. Additionally, Ive purchased and installed Disc Brake Kit from Pridemore and Matt Faust (when available),

    More recently I made my own Disc Set Up using 01-04 Chry Sebring Rotors (#RTR 76921) by machining the ID slightly (.120)  to fit the Hudson Hubs, then installed '70's Camaro Calipers, Pads, and Hoses. I fabricated the Cailiper Bracket from 3/8 mild steel plate in my garage. I Posted all my conversions earlier and a few members have copied the Disc Brkt diagram to have Bracket Machined.

     I used Grade 8 Bolts thru the back side hubs by drilling out threads slightly then used a spacer to clear 'my' wheels. However 610 289 Dorman Studs are available if dont want bolts. I ground off the caliper body just slightly to clear Hudson rim, but with spacer was unnecessary.

     If interested in duplicating I would send a copy of the bracket. It was a very simple conversion and works very well..
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  • 29sptphaeton29sptphaeton Posts: 212Member
    Did you mount the Torino Dual Master cylinder in the stock location under the floor on the 47?
    Or did you mount it on the firewall and change the pedal?  Ed Moore
  • Ol racerOl racer Posts: 2,458Senior Contributor
    edited January 2018
    I mounted the Torino Dual Master Cyl under the floor right onto the pedal Assy bracket where I removed the Hudson M/cyl...Using the Torino & Hudson M/Cyl's as a pattern, I cut a 1/4" triangle Plate wide enough to mount the Torino M/Cyl then drilled it to install 3 'button' bolts onto the pedal bracket. I also hole sawed the center of the plate for the push rod. I counter sunk 2 Button Bolts bolts forward to mount the wider Torino M/Cyl. It was simple to fabricate.

    I had to shorten & re thread the Torino push rod (that came with the M/cyl) to except the Hudson Yoke, then adjusted Pedal free play. All the original Secondary Braking System Linkage was retained. The only drawback is filling the Master Cyl but after bleeding I havent needed to refill in years. However, a plastic Remote Fill can be bought cheaply to mount higher on firewall if desired. A couple of Forum members duplicated the Adapter later but I tried to find the pictures I Posted previously but couldnt locate tonight.
  • charles4dcharles4d Posts: 481Expert Adviser
    Google remote master cylinder fuller on fire wall in Hudson forum 
    Comes right up
  • 29sptphaeton29sptphaeton Posts: 212Member
    Ol Racer,  I would like to do the Torino M/C on my 46 pickup. What year Torino M/C, like 68,69,70 ?  I have a remote filler.  If you find your photos can you email them to me? Ed-moore@com.net
    or if you make the adapter and sell it with the bolts as a kit I’d buy a couple.   Ed
  • 29sptphaeton29sptphaeton Posts: 212Member
    Above email is wrong, should be; ed-moore@comcast.net
  • Ol racerOl racer Posts: 2,458Senior Contributor
    edited January 2018
    The Ford Torino Dual M/Cyl that I installed was a 4 wheel Drum Brake car, just prior to Disc/Drum brakes, probably '67 or '68. Install was about 8 yrs ago and I would need to look thru some old files for part number. It was in Stock item at Auto Store.

    I Posted a few pictures back at the time but can only find one pic now attached below. It was a real simple conversion using a piece of steel plate, hacksaw, hand drill, and like I said, all the Secondary System was retained, (but no longer necessary). I used beveled 5/16 bolts so flush to mate the adapter plate onto the Hudson pedal assy, then the Torino bolted along side facing forward. A cardboard pattern can be traced using both M/Cyl's. Additionally, NO residual vaves were necessary.I ran the large Chamber to front and small chamber to rear brakes.....
    As a foot note,
    Compliment the dual M/Cyl with larger Hornet 11" x 2 1/4" front backing plates, lining, & Drums would really stop great.

    Blue Trk Master Cyl.JPG
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    As I hoped, this site has been a wealth of information so far, thanks to everyone.

    With the ABS front disk set up installed, my attention is now on rebuilding the original rear drum brakes. Is anyone making a suitable replacement for the cylinders? Mine appear to be beyond rebuilding, but could explore that option. Also looking for spring/hardware kits? Shoes?
  • 50C8DAN50C8DAN Posts: 1,765Senior Contributor
    brake wheel cylinders and brake hardware are all available at your local NAPA or other typical supply store.
  • GlowplugGlowplug Posts: 1,678Expert Adviser
    Go to my website and select brakes or the interchange parts area for part numbers.
  • karlkarl Posts: 52Member
    I purchased a kit from a gent in Florida a few years ago. Uses Granada rotors with S10 calipers. Jeep master cylinder in stock location . Real nice neat job with brackets Had to put in residual valves that fit right in between connection on long brake lines inside frame. Had to have hubs machined to accept rotors.I sent him hubs to machine. I bought an extra set of hubs so I didn't ruin my original drum brakes  Everything worked out fine. to push a little harder as no power  booster/ 
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