Register now to get rid of these ads!

disc brake on a 1940 ford

Discussion in 'The Hokey Ass Message Board' started by txskinney, Mar 21, 2009.

  1. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    I am putting disc brake on the front of a 40 Ford coupe. Anybody know of a good master cly. to use that will work with the original brake pedal assembly.
  2. 36-3window
    Joined:
    Apr 10, 2002
    Posts:
    10,815
    Location:
    in my own little world

    36-3window Member

    i'm not aware of any modern dual master cylinder that will bolt to the `40 ford brake pedal. Chassis Engineering make an adapter to use a ford mustang type MC...goes from two bolt on the MC to three bolt on the brake pedal mount

    hard to say for sure what master cylinder to use without more info , buy i'd check out a `68-`72 ford mustang disc/drum
  3. brianangus
    Joined:
    Aug 25, 2005
    Posts:
    2,526
    Location:
    Barrie, Ontario, Canada

    brianangus Member

    txskinney--I can't help you out on the cylinder, but I'm curious about the disc brake swap. My model A is running 1940 Ford front spindles and drums, and I want to change it over to discs this summer. Are you using an all inclusive "kit" to do the change over, or doing it peicemeal?----Brian
  4. Al T
    Joined:
    May 2, 2005
    Posts:
    689
    Location:
    Spruce Grove, Alberta

    Al T Member

    I used a 69-70 Mustang manual brake dual reservoir master cylinder with the afore mentioned adapter on my '39. Really easy install. I'm using a 40 pedal set as I'm using a 40 tranny and column.

    Attached Files:

    Last edited: Mar 21, 2009
    Register now to get rid of these ads!

  5. 2deuces64
    Joined:
    Mar 9, 2006
    Posts:
    675
    Location:
    Great Bend Ks

    2deuces64 Member

    I think Chassis Enginering makes an adapter that bolts to the 40 bracket that alows you to use a late model cylinder.It use to cost about $25 , May be higher now.
  6. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    Brian, I am using a Speedway brake kit. I have drawing of the brackets and bearing adapter needed to put GM disc on 1940 Ford front spindles. But you can buy the speedway cheaper than buying the rotors calipers and having the brackets cut and the adapter made. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>
    I was not sure who made an adapter so I made one and tried a Mustang master cly. and it too tall hits the floor. I would like to not cut the floor. <o:p></o:p>
  7. 39 Ford
    Joined:
    Jan 22, 2006
    Posts:
    1,543
    Location:
    Saylorsburg Pa

    39 Ford Member

    I have 71 Mustang front disc's (home made conversion) and a 9" rear. I adapted a 71 Mustand duel MC to my petals with a homemade adapter ( hours of work for something you can buy off the shelf). I have a adjustable proportioning valve and check valves in the lines.
  8. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    is your master cly below your floor
  9. squigy
    Joined:
    Nov 30, 2003
    Posts:
    3,883
    Location:
    SO.FLO.

    squigy Member

    Yep same as in my 40 frame.
  10. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    does your master cly clear your floor or did you cut it to clear.
  11. 40Standard
    Joined:
    Jul 30, 2005
    Posts:
    5,050
    Location:
    Indy

    40Standard Member

    I both bought and made an adapter and used a 70's master cyl in several 40's works slick
  12. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    that is great to hear i will cut the floor so i can fill and clear the master cly.
  13. sawzall
    Joined:
    Jul 15, 2002
    Posts:
    4,408
    Location:
    Phoenixville, PA

    sawzall
    ALLIANCE MEMBER

    I made my own adapter for the master cyl assembly.. i am using a master cylinder that matches the rear axle in my car.. because I am running 4 wheel discs it made sense.. my adapter is very similar to a chassis engineering adapter. (which can be bought every day of the week)
    additonally many many moons ago when I first converted my straight axle to discs I took these photos of the eci kit installation

    pardon the photo quality as these were "GOOD" quality in 1999.

    here:
    http://public.fotki.com/sawzallshop/portfolio-2/eci_disk_brake_inst/
  14. brianangus
    Joined:
    Aug 25, 2005
    Posts:
    2,526
    Location:
    Barrie, Ontario, Canada

    brianangus Member

    Sawzall---was it necessary to cut off the stock steering arm and add a bolt on steering arm to use this disc brake kit?--I see in your gallery that is what you did.---Brian
  15. weemark
    Joined:
    Sep 1, 2002
    Posts:
    719
    Location:
    scotland

    weemark Member

    a long time ago i had 40 ford spindles on a car and used a TCI kit to do the conversion. it bolted right up, steering arms etc. were all fine and could be used.

    as someone else has mentioned you can use the converter piece, (part no.14078 from sacramento vintage ford) from all the early ford suppliers and bolt up an early 70s mustang MC.

    sacramento vintage ford do a similiar piece except they have extended the mount for the MC and its about 7 inches long which allows the MC to be placed under the floor where the battery is so there is no need to cut the floor as there is already a cut out which allows access to the battery. its similiar idea to the one on the chassis engineering site on page 61 - part no. AS2051/AS2052
  16. sawzall
    Joined:
    Jul 15, 2002
    Posts:
    4,408
    Location:
    Phoenixville, PA

    sawzall
    ALLIANCE MEMBER



    brian

    no.. this required No new steering arms. the bolts you see (and spacers) were part of the kit that eci offered (offers?)

    this was my first incarnation of the 40.. it had a straight axle with stock spindles and disc brakes added.. I removed a few leaves from the front spring and added a reverse eye main leaf..

    we ran that way for about 3 years before I had the scratch to go further..

    FUN!
  17. C9
    Joined:
    Mar 3, 2001
    Posts:
    9,514
    Location:
    Kingman, Arizona - The place on the way to other p

    C9 Member Emeritus

    Brian, I have some close-up pics of 68-70 Mustang discs and a little later era Camaro discs on solid axle highboy roadsters.

    As well as a Mustang/Torino type dual M/C install and novel return spring.

    Rather than highjack this thread, I can put em up in a separate post if you like.
  18. Alienbaby17
    Joined:
    Sep 13, 2005
    Posts:
    876
    Location:
    Mars

    Alienbaby17 Member

    I think I used the ECI kit to adapt a 69-72 Mustang master cylinder in place of the original under-the-floor unit. I am not running a booster. I found that once it was installed it was very difficult to get the 'swing clamp' off of the MC to be able to check/add to the fluid. The original small hole in the floor also would only allow you to see in half the MC at best if you could get the lid off. I ended up cutting out the hole in the floor so it was large enough to easily remove the MC cover and get access to the MC. I still need to find some more attractive cover for that...

    Jay
  19. brianangus
    Joined:
    Aug 25, 2005
    Posts:
    2,526
    Location:
    Barrie, Ontario, Canada

    brianangus Member

    C9---Please do---I can use all the knowledge available before I tackle this job. Forewarned is forearmed.---Thanks---Brian
  20. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    c9 you do not have to start a new thread we all can use the knowledge.
  21. lowtemp
    Joined:
    May 19, 2009
    Posts:
    5
    Location:
    Atlanta

    lowtemp Member

    If I install a front disk brake conversion kit on my '40 ford standard coupe, will I be able to get adapters to allow me to continue to use the original 16" (600-16) wheels and tires on front? Thank you in advance, Scott
  22. papastoyss
    Joined:
    Apr 9, 2009
    Posts:
    189
    Location:
    Lebanon Tn.

    papastoyss Member

    I have a 47 ford , I used the above mentioned adapter w/ a master cyl . from a Mustang II w/o power brakes & the car stops fine.
  23. 19Fordy
    Joined:
    May 17, 2003
    Posts:
    4,422
    Location:
    Coral Springs, FL

    19Fordy Member

    When you change your 40 over to discs will the wheel mounting surface to wheel mounting surface be the same as the original 40 or will it be BIGGER or smaller? Thanks, jim
  24. lowtemp
    Joined:
    May 19, 2009
    Posts:
    5
    Location:
    Atlanta

    lowtemp Member

    I contacted Speedway and got this great reply on aftermarket wheels and if they will work with disk brake conversion kits. "Thanks for contacting Speedway for your hot rod needs.
    You inquired about our disc brake kit with the 5 ½&#8221; bolt pattern and its compatibility with the OEM 16&#8221; wheels. You visited with Coker and they advised that their reproduction OEM style wheels will work with disc brakes and generally this is considered correct. On the other hand you then again mentioned OEM wheels and they will NOT generally work as they will hit the caliper before they are bolted in place. The original wheels wrap around the brake drum inward after leaving the bolt surface and will not clear the calipers. Aftermarket disc brake compatible wheels are flatter as they extend outwards from the bolt surface to allow for the required caliper clearance. If you have your original wheels simply set a ruler on the back side and from the bolt surface outward there can be no more than ½&#8221; drop inward or there will be caliper clearance problems. You will need to extend more than the 12&#8221; standard ruler length as the rotors are 113/4&#8221; and the caliper extends past the rotor another 1 ¼&#8221;. Hopefully this will help enlighten."
  25. lockwoodkustoms
    Joined:
    Dec 22, 2005
    Posts:
    3,755
    Location:
    Binghamton, NY

    lockwoodkustoms Member

    I have disc brakes on the front of my 39 and I am running 39 Lincoln 15 wheels and everything seems to be ok. I have a 60's GM master cylinder under the floor and I made my own adapter. It was not that hard and it brakes good.
  26. Jeem
    Joined:
    Sep 12, 2002
    Posts:
    5,872
    Location:
    ....in the Valley of the SUN.....

    Jeem Alliance Vendor

    Thanks for asking this.

    Typically, disc brakes widen the track by a little bit. I'd consider discs if I could find a conversion or kit that did NOT widen the track whatsoever. Does this exist?
  27. txskinney
    Joined:
    Nov 22, 2008
    Posts:
    46
    Location:
    West Texas

    txskinney Member

    it did widen the track but did not cause any problems. I repaced the wheels with ones from Rally America worked great

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2013 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.