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Old 03-21-2009, 12:36 PM   #1
txskinney
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Default disc brake on a 1940 ford

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.
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Old 03-21-2009, 12:41 PM   #2
36-3window
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Default Re: disc brake on a 1940 ford

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
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Old 03-21-2009, 12:45 PM   #3
brianangus
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Default Re: disc brake on a 1940 ford

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
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Old 03-21-2009, 12:57 PM   #4
Al T
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Default Re: disc brake on a 1940 ford

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.
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Old 03-21-2009, 12:58 PM   #5
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Default Re: disc brake on a 1940 ford

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.
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Old 03-21-2009, 02:53 PM   #6
txskinney
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Default Re: disc brake on a 1940 ford

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. fficeffice" />>>
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. >>
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Old 03-21-2009, 03:40 PM   #7
39 Ford
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Default Re: disc brake on a 1940 ford

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.
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Old 03-21-2009, 03:54 PM   #8
txskinney
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Default Re: disc brake on a 1940 ford

is your master cly below your floor
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Old 03-21-2009, 04:33 PM   #9
squigy
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Default Re: disc brake on a 1940 ford

Yep same as in my 40 frame.
Quote:
Originally Posted by 39coupe View Post
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.
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Old 03-21-2009, 04:55 PM   #10
txskinney
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Default Re: disc brake on a 1940 ford

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Originally Posted by squigy View Post
Yep same as in my 40 frame.
does your master cly clear your floor or did you cut it to clear.
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Old 03-21-2009, 07:22 PM   #11
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Default Re: disc brake on a 1940 ford

I both bought and made an adapter and used a 70's master cyl in several 40's works slick
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Old 03-21-2009, 07:26 PM   #12
txskinney
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Default Re: disc brake on a 1940 ford

Quote:
Originally Posted by 40Standard View Post
I both bought and made an adapter and used a 70's master cyl in several 40's works slick
that is great to hear i will cut the floor so i can fill and clear the master cly.
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Old 03-21-2009, 08:28 PM   #13
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Default Re: disc brake on a 1940 ford

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/...sk_brake_inst/
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Old 03-22-2009, 08:17 AM   #14
brianangus
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Default Re: disc brake on a 1940 ford

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
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Old 03-22-2009, 08:32 AM   #15
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Default Re: disc brake on a 1940 ford

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
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Old 03-22-2009, 08:36 AM   #16
sawzall
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Default Re: disc brake on a 1940 ford

Quote:
Originally Posted by brianangus View Post
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


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!
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Old 03-22-2009, 09:03 AM   #17
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Default Re: disc brake on a 1940 ford

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.
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Old 03-22-2009, 09:51 AM   #18
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Default Re: disc brake on a 1940 ford

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
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Old 03-22-2009, 10:31 AM   #19
brianangus
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Default Re: disc brake on a 1940 ford

C9---Please do---I can use all the knowledge available before I tackle this job. Forewarned is forearmed.---Thanks---Brian
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Old 03-22-2009, 03:04 PM   #20
txskinney
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Default Re: disc brake on a 1940 ford

c9 you do not have to start a new thread we all can use the knowledge.
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