Old question: What MC when changing frontdrum to disc?
#1761928
02/24/15 12:55 PM
02/24/15 12:55 PM
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Joined: Jan 2003
Posts: 7,538
Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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Hey all,
I believe this is a well-beaten question; If I'm going to change the stock front drums to disc brakes on my 2-circuit '67 Satellite (but keep the drums on the rear) I understand I need to switch to a different Master Cylinder..
Is there a commonly used part number for the "disc-drum" Master Cylinder to replace the original "drum only" MC?
I'm hoping the part number doesn't depend on my choice of front disc set up.
Thank you.
- Art
65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
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: Old question: What MC when changing frontdrum to disc?
[Re: 67SATisfaction]
#1761929
02/24/15 03:11 PM
02/24/15 03:11 PM
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Joined: May 2003
Posts: 6,561
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,561
Downtown Roebuck Ont
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Is your current setup manual or power? If it is manual you would want a 15/16" piston MC if possible (sometimes not so easy to find). This will give you the most line pressure for the least pedal effort. In any case the smaller the better. My brake swap experience is more with C-bodies and if you are swapping from power drum to power disc, you need to change the booster to a dual diaphragm disc booster too. The drum booster doesn't have enough ooomph for discs. I would assume the same is true for a B-body. Piston size on the MC is a little less critical with power assist. You are more apt to wind up with too much brake instead of not enough. Here is a link to a chart in the tech archives. http://www.moparts.org/Tech/Archive/brake/14.htmlI see it doesn't mention a 15/16" MC but I see them referred to all the time in disc brake threads.  Kevin
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Re: Old question: What MC when changing frontdrum to disc?
[Re: 67SATisfaction]
#1761931
02/24/15 03:35 PM
02/24/15 03:35 PM
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Joined: Apr 2003
Posts: 348
Texas Hill Country
Centerline
enthusiast
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enthusiast
Joined: Apr 2003
Posts: 348
Texas Hill Country
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If this is a "restoration" and part numbers/casting numbers is an important factor, I believe the Bendix Master Cylinder Casting #2225621 would be the correct one to use.
If the OEM correct unit is not a priority then pretty much any of the replacement units will work fine. RockAuto shows a CARDONE Part # 101475 as a replacement for '67 Coronet and Satellite with disk/drum brakes but there are dozens of places including some vendors here where you can find a disk/drum MC. Its not rocket science, just do a little research and pick the one that works for you.
Centerline
64 Dodge Polara 426 Street Wedge - For when I want to go fast
99 Corvette Z-06 - For when I want to turn corners
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Re: Old question: What MC when changing frontdrum to disc?
[Re: Centerline]
#1761932
02/24/15 08:53 PM
02/24/15 08:53 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
If this is a "restoration" and part numbers/casting numbers is an important factor, I believe the Bendix Master Cylinder Casting #2225621 would be the correct one to use.
If the OEM correct unit is not a priority then pretty much any of the replacement units will work fine. RockAuto shows a CARDONE Part # 101475 as a replacement for '67 Coronet and Satellite with disk/drum brakes but there are dozens of places including some vendors here where you can find a disk/drum MC. Its not rocket science, just do a little research and pick the one that works for you.
The Fenco 1475, Napa/Cardone 10-1475 is a good choice, I use it often on power disc/drum Mopar applications, and it's a great candidate for 4 wheel power disc swaps using the factory 70-4 pin style calipers and SSBBC or Dr Diff Cobra rear disc kits....Art here's the factory listing of Disc/Drum Masters and their respective applications, you didn't specify if you need the lines facing the engine or the side fender well, as well as power or manual master requirement the 1475 has the lines facing the engine
Mike
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Re: Old question: What MC when changing frontdrum to disc?
[Re: closer9]
#1761935
03/08/15 01:18 AM
03/08/15 01:18 AM
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Joined: Jan 2003
Posts: 7,538
Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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Sorry it took me a while to get back here.
Thanks for all the very useful info guys - it's everything I could've wanted to know at this point.
The current MC is manual. OEM appearance is desirable but not critical. The current tubes face the fender. I'm a good pipe bender/flarer so can change as needed. I'll use your info to decide how to proceed.
Very grateful for your replies,
- Art
65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
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: Old question: What MC when changing frontdrum to disc?
[Re: 67SATisfaction]
#1761936
03/08/15 12:29 PM
03/08/15 12:29 PM
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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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I use nothing but 70 or so C body masters.Mine a reman from Advanced has been on for at least 15 years.Did my sons cars and used the same master even when we did drum/drum power.They all worked great.Rocky
Chrysler Firepower
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