66 belvedere convert single master cyl. to dual?
#3127120
03/06/23 10:55 PM
03/06/23 10:55 PM
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Joined: Jan 2004
Posts: 1,468
N.Y.
sixpacksteve
OP
pro stock
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OP
pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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need to convert. don't trust single.
whats needed?
which correct master cyl. and prop valve?
Hell Hath No Fury Like Mine
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Re: 66 belvedere convert single master cyl. to dual?
[Re: gtx6970]
#3127184
03/07/23 09:44 AM
03/07/23 09:44 AM
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Joined: Jan 2003
Posts: 10,707
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,707
North Dakota
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My 66 is converted.
Using everything from a 67 B body.
Still manual drum brakes This is the way to do it.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: 66 belvedere convert single master cyl. to dual?
[Re: 6PakBee]
#3127187
03/07/23 09:53 AM
03/07/23 09:53 AM
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Joined: Jan 2003
Posts: 21,065
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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First is it disc drum or drum drum.If all drum no need for PP valve.We use nothing but C body 70 masters Either disc drum or drum drum.Mines going on 25 years my kids was 15 at least when he sold the 62
Chrysler Firepower
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Re: 66 belvedere convert single master cyl. to dual?
[Re: Cab_Burge]
#3127203
03/07/23 10:41 AM
03/07/23 10:41 AM
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Joined: May 2016
Posts: 630
Ct
Wirenut
mopar
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mopar
Joined: May 2016
Posts: 630
Ct
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hi
get a 1.031 master cyl for disc drum non power
plenty on e bay
get new not reman .
The smaller master cylinder bores will stop better than the larger ones will, a lot better especially on non power brakes   I used either a 7/8 or 15/16 M.C. (CRS now  )on my 1966 Coronet Deluxe that I converted to disc brakes on the front  I haven't driven it much and I do have a problem with the current M.C. it is not holding pressure very well, time to try again on a different one   This is 100% correct. Use the larger and you will never panic stop it . I made that mistake. I converted my 65 to dual circuit and followed the ehrenberg disco tech swap. No prop valve , just use an adjustable valve in the rear line and experiment on damp pavement so rears just lock up first. It will be the best improvement you make to this car . My parts came from a 74 dart fwiw
Last edited by Wirenut; 03/07/23 10:46 AM.
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Re: 66 belvedere convert single master cyl. to dual?
[Re: Wirenut]
#3127282
03/07/23 02:04 PM
03/07/23 02:04 PM
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Joined: Sep 2003
Posts: 19,366
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,366
north of coder
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wagner part numbers for reference. [these are rebuilt disc brake masters] 1 1/32" : F88787 15/16" : F80266 these are 74-75 dart applications. 
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Re: 66 belvedere convert single master cyl. to dual?
[Re: sixpacksteve]
#3128112
03/10/23 12:27 PM
03/10/23 12:27 PM
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Joined: Jan 2003
Posts: 74,978
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,978
U.S.S.A.
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need to convert. don't trust single.
whats needed?
which correct master cyl. and prop valve? Disc/drum or drumdrum? If drum/drum there was no proportioning valve , it is just a distribution block with a switch to trigger the brake warning light.
running up my post count some more .
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Re: 66 belvedere convert single master cyl. to dual?
[Re: 6PakBee]
#3128320
03/11/23 07:06 AM
03/11/23 07:06 AM
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Joined: Jan 2003
Posts: 7,538
Albany, NY
67SATisfaction
The member whose name is actually Art
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The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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My 66 is converted.
Using everything from a 67 B body.
Still manual drum brakes This is the way to do it. Owning both a '65 and '67, this is what I did to my manual drum/drum '65. It worked fine. I sourced the brass splitter block on the frame rail and an OEM MC from a salvage yard and had it rebuilt. Bench bleed the MC carefully. I don't recall if I needed the shaft from the pedal, but I'm a parts hoarder, so I probably got it too off the donor car. The rear steel lines I reused as feasible, and bent and flared the second line myself. I have good bending skills and tools, and easy to get it right having my '67 right there for reference. I recall it was a little hard to source the second fitting at the MC, it has a particular size or thread. - Art
Last edited by 67SATisfaction; 03/11/23 07:08 AM.
65 Satellite hardtop 361/4bbl console 727 2.76
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71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd
82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle
75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF
77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF
07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: 66 belvedere convert single master cyl. to dual?
[Re: 67SATisfaction]
#3128533
03/11/23 06:14 PM
03/11/23 06:14 PM
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Joined: Sep 2003
Posts: 19,366
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,366
north of coder
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if my feeble memory serves me right, [  ] the sizes are 1/2-20, and 9/16-18. i think i have some of those in my drawer of brass fittings, as well as the factory fittings i have squirreled away over the years. if i called these sizes wrong, i'll go out and measure them.
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