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What master cylinder #2658998
05/25/19 09:20 AM
05/25/19 09:20 AM
Joined: Jul 2011
Posts: 47
Hazlet nj
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Joemoy29 Offline OP
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Joemoy29  Offline OP
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Joined: Jul 2011
Posts: 47
Hazlet nj
I have a 72 cuda with front disc and 11” drum in rear. Had manual brakes. I cannot find a master cylinder listed for this application... any help would be great

Re: What master cylinder [Re: Joemoy29] #2659005
05/25/19 09:41 AM
05/25/19 09:41 AM
Joined: May 2019
Posts: 6,174
nowhere
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Sniper Offline
master
Sniper  Offline
master
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Joined: May 2019
Posts: 6,174
nowhere
According to the specifications in the 72 Plymouth FSM, which can be freely downloaded here, the master cylinder is the same for power or manual disc brakes.

Rockauto lists several choices.

Re: What master cylinder [Re: Joemoy29] #2659680
05/27/19 04:06 PM
05/27/19 04:06 PM
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Sxrxrnr Offline
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Sxrxrnr  Offline
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Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
On my 70 Challenger that originally came no power brake, drum brakes. Replaced drums with discs. Horrible brake action that required excessive pedal force to stop car.

Finally installed a very soft pad that helped,,,but ended with filthy wheels after very few miles of driving from brake dust.

After much investigation and complete BS from many “experts”, I learned that smaller MC bore increases braking pressure on discs than does larger bores. Sounds A*** backwards but is true. Found this cylinder, installed it,,,went to very clean ceramic pad, brakes are very good. Original drum brake MC was a larger bore.

Do not know if fits your Cuda,,,but you get the idea,,,,in this case smaller is really better

https://www.amazon.com/gp/product/B001PYO1PU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Re: What master cylinder [Re: Sxrxrnr] #2659998
05/28/19 01:05 PM
05/28/19 01:05 PM
Joined: Jan 2003
Posts: 3,675
South San Francisco, Ca
70sixpkrt Offline
master
70sixpkrt  Offline
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Posts: 3,675
South San Francisco, Ca
On my 1970 Charger I'm using the 7/8 wheel cylinders and 15/16 master cylinder. The pedal feels good.


[img]http://www.imgur.com/hxlGUJt.gif[/img]
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Re: What master cylinder [Re: 70sixpkrt] #2681105
07/25/19 07:07 AM
07/25/19 07:07 AM
Joined: Jan 2003
Posts: 1,756
London, England
Gavin Offline
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Gavin  Offline
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Joined: Jan 2003
Posts: 1,756
London, England
This has been addressed a number of times so definitely worth a search on the board, but yes the consensus is to use the 15/16 bore master cylinder, as shown in the link (or if you are not worried about looking stock-ish, an aluminum 15/16 based on the later model if anyone is still offering them). Note the original application for the iron one was mid-70's A-Bodies with POWER brakes, don't be put off by that, this is what you need for your manual discs on your Cuda. The 7/8" rear cylinders also a good idea, though you have 11" rear drums rather than 10", so not sure if this would affect that choice.....

Re: What master cylinder [Re: Gavin] #2681189
07/25/19 10:33 AM
07/25/19 10:33 AM
Joined: Sep 2011
Posts: 2,042
colorado
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savoy64 Offline
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savoy64  Offline
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Joined: Sep 2011
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colorado
surprisingly the 10 brake has more pad area than the 11 inch brake-----







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