This will take you to the main site where there is history, technical information and other information on these cars.
This takes you back to the main page of the forums.
This is the control panel to change your password, information and preferences on this message board.
Click here if your lost your password or need to register on this message board. You must be a registered user to post. Registration is free.
Search this board for information you need.
Click here to buy cool Squarebirds mechandise.
Click here to support For $20 annually receive 20mBytes webspace, a Squarebirds e-mail address and member's icon on the message board.
Old 12-31-2014, 10:23 AM
philgarvey philgarvey is offline
Join Date: Jul 21 2011
Posts: 36
philgarvey is on a distinguished road
Default disc brake conversion

The tech library has gary hamm's tutorial on the disc brake conversion on birds 58-60. Does anyone know if the original master cylinder provides enough pressure or is another master cylinder required.
Reply With Quote
Old 12-31-2014, 10:31 AM
jopizz's Avatar
jopizz jopizz is offline
Excellent Auto Mechanic for over 40 years.
Join Date: Nov 23 2009
Posts: 5,490
jopizz is on a distinguished road

You need another master cylinder designed for disc brakes or you can have the old one modified for disc brakes. Dewey's Booster Service is one place that will modify the original one.

John Pizzi - Squarebirds Administrator
1959 Convertible

Thunderbird Registry #36223 856-779-9695
Reply With Quote
Old 12-31-2014, 10:52 AM
philgarvey philgarvey is offline
Join Date: Jul 21 2011
Posts: 36
philgarvey is on a distinguished road

thank you. I just checked out Dewey's. $145 for the modification. As a plan B, do you know if there is a compatible (make model) galaxie? lincoln? year? master cylinder or is mounting on the fire wall a problem?
Reply With Quote
Old 12-31-2014, 11:08 AM
DKheld's Avatar
DKheld DKheld is offline
Join Date: Aug 27 2008
Posts: 1,557
DKheld is on a distinguished road

Booster Dewey can modify the original bendix under the hood booster to accept a modern style master cyl. The booster provides acceptable boost but not like the small dual action boosters available today.

Dewy rebuilds the boosters as well - the one he did for me has been working great for 10+ years. Believe I used a Granada or Mustang brake master cyl. As you can see the lines exit on the engine side - tight but workable.

You will also need a proportioning or combination valve and split the old single line system into a dual system.
You can't just throw a disc/drum master cyl on there and call it done. The front brakes will be different thus splitting the system and the valve (I used a combo valve). You will also need to plan to move the brake light switch to the rear drum system and extend the wiring.

I converted mine using Granada spindles 10+ years ago but I would recommend the scarebird brackets now available due to alignment issues on the Granada spindles.


edit - just saw the additional question...

I tried the Galaxie bracket once but it did not fit. May have worked with some mods to the bracket where it bolts to the firewall but then still had the brake pedal rod to deal with. That's when I went with the modified original.
It is possible to cut the old booster off and re-use the brackets for a new booster.
Search the forum on disc brakes - lots of info. Couple of different routes folks have gone. Think if you join the forum by becoming a paid member there is a complete parts list available. Makes it easy.

Last edited by DKheld : 12-31-2014 at 11:29 AM.
Reply With Quote
Old 12-31-2014, 04:23 PM
simplyconnected's Avatar
simplyconnected simplyconnected is online now
Slow Typist
Join Date: May 26 2009
Posts: 7,520
simplyconnected is on a distinguished road

Let's back up a bit... You have a '59. Does your car have a booster under the hood? If so, you can re-use your firewall bracket and all hardware back to the pedal remains untouched.

If you have a Treadle-Vac system with the booster next to the brake pedal, this job will become a bit more complicated.

In any case, as Eric said, the original booster was fine for drum brakes but it is sadly underpowered for disk brakes. As a bare minimum we use a two-stage 8" booster, that delivers more than 800 psi., from a 1" bore dual master cylinder. If a larger booster would fit, we would use it, but the two-stage 8" does the trick.

The firewall bracket raises the booster 5" and it extends it out from the firewall another 5". This is necessary to clear the shift arms on the steering column. - Dave
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
Old 12-31-2014, 05:55 PM
philgarvey philgarvey is offline
Join Date: Jul 21 2011
Posts: 36
philgarvey is on a distinguished road

Thank you all. I have some work to do but that is what the off season is for. Happy new year to all.
phil garvey
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 03:35 AM.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Any submissions to this site and any post on this site becomes property of . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by