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brake bore diameter

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brake bore diameter

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Old

Sep 25, 2008 | 11:11 AM

#1

someday

Thread Starter

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Fleet Mechanic

Joined: Feb 2004

Posts: 1,379

Likes: 9

From: midwest

brake bore diameter

would a wheel cylinder with a 1 3/16" diameter be better than one with a 1 1/16" diameter or is it the other way around?

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Old

Sep 25, 2008 | 12:16 PM

#2

Lazy K

Post Fiend

Joined: Jan 2005

Posts: 8,402

Likes: 10

Depends what you mean by "better". For the same pressure from the master cylinder the bigger dia. cylinder will exert more force on the shoes. This means that the brakes will lock up with less pedal pressure. Also the bigger cylinder will need more fluid to move the pistons and hence more pedal travel. However with properly adjusted shoes this should not be an issue. Hope this helps.

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Old

Sep 25, 2008 | 12:33 PM

#3

ynevada

Senior User

Joined: Sep 2007

Posts: 328

Likes: 0

for best results, replace it with, what you took off.

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Old

Sep 26, 2008 | 01:08 AM

#4

someday

Thread Starter

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Fleet Mechanic

Joined: Feb 2004

Posts: 1,379

Likes: 9

From: midwest

that is the problem i can not go by what is on there now...ive been able to cross reference and 1 3/16" should be stock...ill check when i take the old ones off

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Old

Sep 26, 2008 | 03:47 PM

#5

aeomholt

Senior User

Joined: Dec 2003

Posts: 118

Likes: 0

From: Norway

I have a -92 E350, 7.3 diesel, single rear wheel.
My bands are 12" by 3.5" wide and my wheelcylinders are 1 1/16" bore if this helps

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