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11-26-2006, 03:56 PM
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#1 |
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NOT REALLY BANNED!
 
Join Date: Jul 2004
Location: Shawnee, KS
Posts: 1,072
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drum vs. disc mc id?
How do you tell the difference between the two?
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1987 Mustang Coupe - 2.7 Stroker, 78mm turbo, Stainless header, 3" Exh, FMIC, 160lb/hr Injectors, MS3, twin walbro 255's, 34psi. Eating V8's daily. 04 Pontiac GTO 04 Ford Mustang GT 68 C20 LWB stripper truck 73 K5 Cheyenne 76 C20 Sierra Crew SRW 88 K20 Suburban I'm not hammering on metal just to hammer, i'm creating a piece of art. |
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11-26-2006, 04:44 PM
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#2 |
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Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
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Re: drum vs. disc mc id?
I thought they were the same, its the proportioning valve that is different. Please excuse me if I'm worng, but the one I pulled out and the one I installed looked the same to me (drum/drum removed, disc/drum installed).
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11-26-2006, 05:30 PM
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#3 |
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Registered User
Join Date: Sep 2003
Location: Franconia,N.H.
Posts: 1,029
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Re: drum vs. disc mc id?
yea it's the prop valve that is different
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(Only) Member of the CPNE Fan Club  Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step  82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver) |
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11-26-2006, 07:34 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: drum vs. disc mc id?
discs require much more fluid to compinsate for the adjustment that is done through hydraulics instead of a mechanical adjuster.
The general automotive rule is that the disk master will have much higher line pressure, but these trucks don't always follow general brake rules, one they don't follow is that the P/N for a power brake master is not the same as amanual master cylinder...the trucks use the same master for either aplication. |
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