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Drum brakes and mountain roads

Posted By LordMrFord 6 Years Ago
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MoonShadow
Posted 6 Years Ago
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My dad was a multi million mile truck driver starting in the 1930's and on into the 60's. He lived through a period of the expansion of the trucking industry and the development of brakes to match. He taught me the "snub" brake method although he never called it that. I've used it all my life including years of towing travel trailer and car trailers. I've had hot brakes but they have never failed. With larger trailers I've always had trailer brakes and use them in conjunction with the vehicle brakes to assist in braking. The snub braking works for me. Reducing gears at the top of the hill is also a requirement that isn't mentioned in the article. For long declines it is a life saver. I've pulled trailers through the mountains of Colorado and California without any problems this way.

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire
miker
Posted 6 Years Ago
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This is from a truck site, and the term “snub braking” wasn’t used then. But this is how I was taught to use drum brakes on a long downhill run. It was also how they taught the bus drivers on the hills of Seattle. Back in the 60’s, when disc were a new deal and not on most vehicles.

I’ve also made the mistake of trying to use racing linings on disc on the street. Cold, they don’t work all that well.

http://www.dieselhub.com/towing/snub-braking.html

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ
Daniel Jessup
Posted 6 Years Ago
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While I have not had my 55 Fairlane down any mountain roads yet, I am impressed by the upgrade of using a power brake booster on my original brake setup (turned drums and new brake shoes, new master cylinders, new hoses, etc). Especially in stop and go traffic, the interstate, etc. I cannot believe the price of getting an original drum for these cars, crazy stuff. The more I drive the car the more I think that when I wear out the front drums I will go with disk brakes up front. This is the last time I can turn those drums.

Daniel Jessup

Lancaster, California

aka "The Hot Rod Reverend" w00t
check out the 1955 Ford Fairlane build at www.hotrodreverend.com


LordMrFord
Posted 6 Years Ago
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So rebuild drums and dot 5.1 fluids should do the thing?
If I swap the eight inch rear end from my 63 Fairlane with five lug pattern, I have to think, what to do with my front brakes... we dont have our scrapyards full of old US granada stuff so expensive front disc kit might be the only easy way.



Hyvinkää, FI
charliemccraney
Posted 6 Years Ago
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High performance street materials should not require high temperatures to work.  It's stuff that is designed for track use that requires that.  I've seen warnings on track use items that said effectively if you use this on the street, you will die, paraphrased, of course.  I'd be surprised if anything like that exists for drum brakes.  As usual, if there is any doubt, check with the manufacturer or supplier.


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Tedster
Posted 6 Years Ago
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Drum brakes on all 4 corners aren't as good as discs, the main problem generally is that the knowledge base for installation and setup isn't what it once was. If they are setup right they work OK, I don't have a problem with them. Often the assemblies the new components themselves are installed on are usually in need of repair by now. The drum backing plates for example. There are 3 raised flat surfaces that each shoe rides on and slides or rotates on, with long use these pads become gouged and the shoes may no longer retract smartly or even stick. Old hoses limit the return of fluid.

High performance brake linings may not be what you want. This type of material is designed for racing or similar activities and won't provide decent stopping power till they achieve very high temperatures.

As mentioned oversize linings used to be sold, for a close initial fit with drums that had been turned oversize, and then the shoe linings were arc'd on a machine for a full contact patch with the drum surface. There are some ways around this, careful attention to the front axle brakes are important because it is responsible for roughly 70% of the stopping power.

There is also a break-in or "bedding in" procedure for any new brake lining. They need to get hot. Really hot, so's you can smell 'em hot. There are resins and binders that need to be burned off, basically. Ironically a long downhill stretch is probably the best way to achieve this.
charliemccraney
Posted 6 Years Ago
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Probably the only way you might get a performance oriented shoe is to send them out to a company that relines brakes.


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57RancheroJim
Posted 6 Years Ago
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Years ago when you bought brake shoes and had the drums turned they would arc the shoes to fit the drums, not many places you can get that done anymore so it takes miles before the shoes wear in to match the drum radius and have full contact. Also brake shoe material today isn't the same, no more asbestos. I use to run GreyRock semi metallic but those haven't been available for a long time. I don't know of anyone who makes a hipo shoe today.
Florida_Phil
Posted 6 Years Ago
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I have a related question.  I am not a professional mechanic, but I have done a number of brake jobs on my own cars over the years.  When I rebuilt the drum brakes on my 1955 TBird, they didn't work that well.  I considered upgrading to disks.  Since then, the drum brakes seemed to steadily get better.  It's like the shoes and the drums needed time to adjust to each other.  I assume this is normal?  Is there a way to avoid this and keep the drum brakes?  Are there high performance brake shoes that will stop better than auto parts shoes?


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Talkwrench
Posted 6 Years Ago
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use your gears.. IF your drum brakes are well adjusted and as they should be you should have no issue.



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