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Master cylinder for 4 wheel manual disc?
#1994989
01/20/16 04:46 PM
01/20/16 04:46 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
OP
super stock
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OP
super stock
Joined: Mar 2009
Posts: 1,058
bigfork mn
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What is a good master cylinder to run with 4 wheel manual disc brakes. I am putting together a rear disc setup for the Dana 60 Im putting together right now. I am using GM metric calipers and using 1980's Diplomat front disc brakes. I also ordered a adjustable propotioning valve. I was running stock rear drums and the Diplomat disc up front with a 94 Dodge Ram aluminum master cylinder but the issue I have now is the peddle is very hard. The brakes work ok but it takes both feet to stop it from 125 mph. The Ram master has a really big piston and is actually a power brake master. I was thinking I needed a manual brake master with a smaller piston. I would like to stay with the aluminum master if possible.
67' charger 499 RB
10.57 at 127
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Re: Master cylinder for 4 wheel manual disc?
[Re: dragram440]
#1995046
01/20/16 05:40 PM
01/20/16 05:40 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
OP
super stock
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OP
super stock
Joined: Mar 2009
Posts: 1,058
bigfork mn
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I should have ordered one from him this morning when I ordered all my Dana 60 parts!
67' charger 499 RB
10.57 at 127
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Re: Master cylinder for 4 wheel manual disc?
[Re: WS68SSC]
#1995075
01/20/16 06:22 PM
01/20/16 06:22 PM
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Joined: Dec 2004
Posts: 10,555
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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justinp61 is right, Dr. Diff is the man. Good affordable stuff!
And personally I would use calipers off of a Jeep Cherokee. I am not a fan of cross breeding garbage Chebby parts on a Mopar. Do you have a part number handy to use Jeep calipers??? Most aftermarket kits use a GM metric caliper or a Ford calipers so if you have an alternative please enlighten us. Gus 
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Master cylinder for 4 wheel manual disc?
[Re: WS68SSC]
#1995155
01/20/16 09:24 PM
01/20/16 09:24 PM
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Joined: Dec 2004
Posts: 10,555
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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Yeah it's called get off your a** and test it out. Anyone can just pick a set out of a catalog. What happened to the pride? I have seen several set ups with mopar brand disc brake set ups. Yet everyone jumps on the chevy band wagon. Billy if you have seen "several" setups then why can't you name one??? The guy you refer to as "THE MAN" offers his upgrade kits with GM and Ford calipers but he must not want to get off his "a**" either. The GM metric caliper has about a dozen different compounds depending on what type of racing you plan on doing so why would I want to put an inferior designed caliper on my race car? You "MOPAR OR NOCAR" types always make me laugh to myself putting second rate parts on your car out of some blind loyalty in a company that couldn't care less about you. But this is America and we can all build our cars the way we want to  Good luck and I hope Fiat/Chrysler sends you a thank you letter for your blind faith in their engineering department  Gus
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Master cylinder for 4 wheel manual disc?
[Re: dragram440]
#1995156
01/20/16 09:31 PM
01/20/16 09:31 PM
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Joined: Jun 2005
Posts: 5,107
Western Md.
skicker
"The Champ"
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"The Champ"
Joined: Jun 2005
Posts: 5,107
Western Md.
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I just finished E-mailing Cass about a m/c for the 72 Duster. I am going manual brakes with Wilwood discs on all 4 corners. He suggested using the 15/16" bore M/C. 
...FAFO...
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Re: Master cylinder for 4 wheel manual disc?
[Re: dragram440]
#1995252
01/21/16 12:30 AM
01/21/16 12:30 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Measure the master cyl bore you have on it now.. its just to large... you have a very hard pedal and it moves very little distance.. correct... put a smaller bore master on it EDIT here is some reading for you on ratios and masters http://www.markwilliams.com/braketech.aspx 
Last edited by MR_P_BODY; 01/21/16 12:34 AM.
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Re: Master cylinder for 4 wheel manual disc?
[Re: dragram440]
#1995496
01/21/16 01:47 PM
01/21/16 01:47 PM
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Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,010
Frostbitefalls MN (Rocky&Bullw...
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I run a 7/8 bore Mopar cast iron unit on my street Dart, works well with Wilwood front discs, Ford Explorer discs on the back (oops, sorry I mentioned cross breeding) . The travel is a touch more than I like, but is stops very well with little effort.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Master cylinder for 4 wheel manual disc?
[Re: WS68SSC]
#1995536
01/21/16 03:17 PM
01/21/16 03:17 PM
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Joined: Jul 2015
Posts: 200
midwest
superchuck
On thin ice
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On thin ice
Joined: Jul 2015
Posts: 200
midwest
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What happened to the pride? I have seen several set ups with mopar brand disc brake set ups. Yet everyone jumps on the chevy band wagon. Chevy bandwagon stops my car just fine! My pride is when I see the win light.
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Re: Master cylinder for 4 wheel manual disc?
[Re: fourgearsavoy]
#1995608
01/21/16 04:50 PM
01/21/16 04:50 PM
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Joined: Jul 2015
Posts: 299
Chicago adjacent
WS68SSC
Newest
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Newest
Joined: Jul 2015
Posts: 299
Chicago adjacent
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Yeah it's called get off your a** and test it out. Anyone can just pick a set out of a catalog. What happened to the pride? I have seen several set ups with mopar brand disc brake set ups. Yet everyone jumps on the chevy band wagon. Billy if you have seen "several" setups then why can't you name one??? The guy you refer to as "THE MAN" offers his upgrade kits with GM and Ford calipers but he must not want to get off his "a**" either. The GM metric caliper has about a dozen different compounds depending on what type of racing you plan on doing so why would I want to put an inferior designed caliper on my race car? You "MOPAR OR NOCAR" types always make me laugh to myself putting second rate parts on your car out of some blind loyalty in a company that couldn't care less about you. But this is America and we can all build our cars the way we want to Good luck and I hope Fiat/Chrysler sends you a thank you letter for your blind faith in their engineering department Gus But we are not talking modern age cars. We are talking about cars that were built in an era of pride and affordability. I know growing up and racing where I live, a Chevy guy would pass you up on the side of the road if you were broke down just because you had a Mopar. Just full of alot mpre vintage pride and history. Just my two cents
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Re: Master cylinder for 4 wheel manual disc?
[Re: dragram440]
#1995613
01/21/16 04:57 PM
01/21/16 04:57 PM
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Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
Eric
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
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Last edited by Eric; 01/21/16 04:58 PM.
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: Master cylinder for 4 wheel manual disc?
[Re: gregsdart]
#1995635
01/21/16 05:30 PM
01/21/16 05:30 PM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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I run a 7/8 bore Mopar cast iron unit on my street Dart, works well with Wilwood front discs, Ford Explorer discs on the back (oops, sorry I mentioned cross breeding) . The travel is a touch more than I like, but is stops very well with little effort. That's what my Dart had on it, the car felt like it would just sit down when I got on the brakes. I wish I'd looked for a kit and just rebuilt it.
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Re: Master cylinder for 4 wheel manual disc?
[Re: WS68SSC]
#1995729
01/21/16 07:12 PM
01/21/16 07:12 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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But we are not talking modern age cars. We are talking about cars that were built in an era of pride and affordability. I know growing up and racing where I live, a Chevy guy would pass you up on the side of the road if you were broke down just because you had a Mopar. Just full of alot mpre vintage pride and history. Just my two cents [/quote] We are talking hydraulics here.. nothing more.. if you can find/buy a cheaper caliper and make it work whats wrong with that... all this is, is bore and ratio stuff for a certain size caliper bore... its simple hydraulics
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