Go Back   The Ford Barn > General Discussion > Late V8 (1954+)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 11-16-2015, 07:26 AM   #21
Motorhead6
Senior Member
 
Join Date: Jul 2012
Location: Orange Park, Fl
Posts: 404
Default Re: 1955 Ford poor brake performance

My '55 sedan has perfect brakes. Assuming you did the proper adjusting and bleeding, the first thing I would check is that you have the correct wheel cylinder and master cylinder bore diameters installed. A larger MC (less psi for a given pedal pressure due to a larger piston area) or smaller wheel cylinder diameter (less total area of the piston face and thus less total pressure for a given pedal pressure) will reduce braking performance. Over the years someone may have installed the wrong parts.

An improperly arched set of shoes should not significantly affect stopping power, but will require more frequent adjusting of brakes until the shoes wear into the drums.
Motorhead6 is offline   Reply With Quote
Old 11-16-2015, 08:36 PM   #22
willowbilly3
Senior Member
 
Join Date: Sep 2011
Location: Black Hills, SD
Posts: 577
Default Re: 1955 Ford poor brake performance

Ah, for the old Velvet touch linings again.
willowbilly3 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 11-17-2015, 02:54 PM   #23
Motorhead6
Senior Member
 
Join Date: Jul 2012
Location: Orange Park, Fl
Posts: 404
Default Re: 1955 Ford poor brake performance

'55 Fords have great brakes if properly maintained. I will make a guess here that someone has mismatched the bore diameter of the M/C and/or wheel cylinders. A larger MC bore will cause you to have to press harder on the brake pedal to generate the same psi in the brake lines as a smaller bore. A smaller set of wheel cylinder bores will have the same effect. I would first suspect the M/C since you did not complain of one wheel locking up. Go to your parts store and get a rebuild kit for the '55 application and see if it has the same diameter parts as what you have on board. If it is the same, return it and do the same for the wheel cylinders.

Not arching the shoes will cause you to have to make more frequent brake adjustments, but should not significantly affect brake pedal pressure relative to a given stopping rate.

Last edited by Motorhead6; 11-17-2015 at 03:53 PM.
Motorhead6 is offline   Reply With Quote
Old 11-18-2015, 10:13 AM   #24
Ole Don
Senior Member
 
Ole Don's Avatar
 
Join Date: May 2010
Location: St. Michael, Minnesota
Posts: 1,578
Default Re: 1955 Ford poor brake performance

One other thing to consider; today, most of us use radial tires one or two sizes larger. They act like giant flywheels, radials should grip the ground better.
Ole Don is offline   Reply With Quote
Old 11-18-2015, 11:11 AM   #25
hardlyrider
Junior Member
 
hardlyrider's Avatar
 
Join Date: Sep 2015
Location: Northeast Texas
Posts: 23
Default Re: 1955 Ford poor brake performance

Well, everyone is pitching in advice here, and Drewbaby has yet to further explain the symptoms. I drove a 1950 2 dr sedan in high school and other than "fade", never had any problems. I checked and adjusted the brakes every other time I changed the oil and always had a good firm pedal. I've just redone the complete brake system (other than hard lines) on my '58 F100 and will agree with dmsfrr that there could be a m/c problem. The first rebuilt one would never get me any pedal height and almost no pressure at the shoes. With a replacement and bench bleeding, further bleeding after installation was not even required. Good firm pedal now.
hardlyrider is offline   Reply With Quote
Old 11-19-2015, 10:19 AM   #26
drewbaby
Junior Member
 
Join Date: May 2011
Posts: 20
Default Re: 1955 Ford poor brake performance

Thanks to everyone who replied. I've done all adjustments. I have a high firm pedal. I could possibly relocate the master cylinder push rod closer to the pivot point or woven liner could be an interesting option.
I have correct bore size on wheel cylinders and master cylinders. That was my first thought.
As far as arcing the brake shoes, I know that can be done at home by sandpaper fixed to the inside of the drum and fitting the shoes by hand. It didn't need that with new standard 11" drums.
As for now I'll enjoy the experience just like "ole Don" stated.
I also have a 1934 with mechanical brakes and a 1948 and the brakes on both work fine.

Thanks again!!
drewbaby is offline   Reply With Quote
Old 11-24-2015, 08:12 AM   #27
fordsbyjay
Junior Member
 
Join Date: Feb 2013
Posts: 10
Default Re: 1955 Ford poor brake performance

Is it the original master cylinder still? A smaller bore m/cyl will reduce some of the pedal effort at the expense of pedal travel. A very small amount of pedal travel. As soon as I bought my 56 I swapped out the m/cyl for a dual setup for safety reasons. I just stole the one of another Ford and it works fine. If the pedal is high and firm then you shouldn't have any air in the system. I find my brakes work good but drums aren't know for to many repetitive stops before fading.

On a couple other cars I used a m/cyl from a 85 Ranger. It has a 15/16 bore and worked good in my tbucket.
fordsbyjay is offline   Reply With Quote
Reply

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 06:29 PM.