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| Re: [GMCnet] Drum brakes [message #329021 is a reply to message #329018] |
Sat, 10 February 2018 10:26   |
James Hupy
Messages: 6806
Registered: May 2010
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Senior Member |
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Didn't want to get into the math, thought EVERYONE would get a visual image
of stiletto heels on their back.
Same amount of hydraulic pressure applied to a larger surface area,
results in less pressure per square inch. Less friction between the drum
and shoes. Does the increased shoe area at less pressure per square inch
equal less shoe area at the same pressure? You discuss that one. I think
that there is no advantage to more lining area at the same pressure. Wear
rate? If there is less friction, linings might not wear as quickly.
The whole deal with brakes is to convert kinetic energy into heat
energy. Simply put, rotors and calipers simply do a much better job of
that. Heat transfer to the airstream is better, too, so less chance of
brake fade in heavy use. Like motor homes equipped with car brakes.
I have installed Buick/Cadillac calipers with cable operated caliper
pistons on GMC'S for parking brakes. They will work, properly installed and
adjusted. And they meet D.O.T. regulations.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Feb 10, 2018 8:06 AM, "Emery Stora" wrote:
> What was I supposed to learn? Wider is better for pain in a message. How
> does this translate to “wider ain’t better” for brakes?
>
> Yes, you have less pounds/ sq inch with wide shoes but you have more sq
> inches so the braking force is the same.
>
> You should get less wear on the shoes though. Probably not enough to
> justify any additional cost.
>
> Emery Stora
> 77 Kingsley
> Frederick, CA
>
>> On Feb 10, 2018, at 8:51 AM, James Hupy wrote:
>>
>> Think about a masseur walking up and down your back, barefoot. Got that?
>> Now think about the same person walking the same way, this time in
> stiletto
>> heels. Which would you prefer? Now, apply what you have learned from
> this
>> example to drum brake shoes. Wider ain't better.
>> Jim Hupy
>> Salem, Or
>> 78 GMC ROYALE 403
>>
>>> On Feb 10, 2018 7:45 AM, "Wally Anderson"
> wrote:
>>>
>>> palerider wrote on Fri, 09 February 2018 21:57
>>>> I seem to remember a long time ago reading about re-placing the rear
>>> brakes shoes with larger, wider shoes and drums. Using all stock GM
> stuff.
>>>> Maybe from truck, van etc. Anyone have that knowledge stored anywhere
>>> in their gray matter? Thanks.....Tom
>>>
>>> Tom Hampton at Grandview has wide shoe setups
>>> http://www.grandviewmotorhome.com/partsupgrades.html
>>> http://www.grandviewmotorhome.com/partsupgrades.html
>>> --
>>> Wally Anderson
>>> Omaha NE
>>> 75 Glenbrook
>>> Megasquirt III injection
>>> Bob Stone hydroBOOOOST
>>> Manny reaction arm system
>>> Branscombe Kelsey Hayes park brake
>>> http://wallyandsue.blogspot.com/
>>>
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