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#1 |
Registered User
Join Date: Sep 2002
Location: long island, new york
Posts: 1,333
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what wqould happen if i was to use my drum drum 3/4 ton MC and prop valve with my new disc brakes? im kinda no really tight on money and i cant quite cough up the cash to pay for the last pecies. aso i have a late model MC but no prop valve could i use that? thank you -kyle
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1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door |
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#2 |
Registered User
Join Date: Jan 2003
Location: Chandler, AZ
Posts: 189
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Your drum setup requires a 10lb residual pressure valve to keep the shoes out near the drum.
disc setups only require 2lb rpv valves. the brakes would drag. |
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#3 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Plus, on top of that,t eh reivour needs to be bigger on discs since there is no mechanical adjustment...the hyd make up the adjustments on them.
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#4 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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plus ur truck wont stop worth a sh!t because disks require more pressure to operate than drums do. brakes are a very bad place to cut corners but im not gonna lecture u its your life and ur truck both in your hands. just wait till u can afford it and get a new master and prop valve
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#5 |
Registered User
Join Date: Aug 2001
Location: Menifee, Calif, USA
Posts: 2,145
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I agree, DONT RUSH IT!
Remember its your Truck, Life, your passengers and others around you.... save up a bit longer and get little by little
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With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ ![]() ![]() |
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#6 |
Registered User
Join Date: Aug 2001
Location: Menifee, Calif, USA
Posts: 2,145
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b t w - post you are looking for those parts on the parts board, you never know a Board member might just have a great deal for you......
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With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ ![]() ![]() |
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#7 |
Registered User
Join Date: Feb 2001
Location: Salem , Oregon 97301
Posts: 1,796
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Is there a difference between disk 1/2 ton prop valve and disk 3/4 ton prop valve ?
Last edited by jose; 11-19-2003 at 04:39 AM. |
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#8 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Can you get a Adj. porp valve ? Summit selles them for like 50 bucks I think you need thoed tings that hold presssure in the lines though ... I don't know
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#9 |
Registered User
Join Date: Jan 2003
Location: Chandler, AZ
Posts: 189
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I just wanted to clarify, Im talking about the "residual pressure valves" not Proportioning valves.
P. valves maintain the balance between front and rear braking. RPV's retain 2lbs of pressure on the caliper pads and are usually mounted internally inside the master cylinder. Drums again require 10lbs. of pressure to keep the shoe extended slightly touching the drum. |
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#10 |
Senior Member
![]() Join Date: Dec 1999
Location: Spring Valley, Ca.
Posts: 1,112
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And the pressure difference between the two means that using the drum brake M/C you will have constant pressure on the calipers. Causing unnecessary wear to pads, glazed rotors, and lost gas milage.
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Smitty '71 Short Fleetside Spring Valley, Ca. |
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