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Which master cylinder for a manual front disc/rear drum set up on a '69 Charger?

Started by Daytona R/T SE, January 24, 2018, 07:04:15 PM

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A383Wing

My 70 had disc-drums on it, and it had just a standard dual master cylinder with the reservoirs the same size

70sixpkrt

I'm running a Raybestos MC36406. It is a 15/16" master cylinder. It's for a 73-75 A Body. Pressure of the pedal feels good. You should call Dr Diff and talk to him. You can also get it at RockAuto.
http://www.doctordiff.com


440-6pk, 4-speed, Dana 60 with 3:54  
13.01 @107.93 (street tires spinning all the way down)

John_Kunkel


A lot depends on the size of your wheel cylinders, with large diameter calipers and rear wheel cylinders the 15/16" MC might run out of travel. On my latest swap with 2.95" calipers and 15/16" rear wheel cylinders I had to go to a 1 1/8" MC to get a decent pedal. (manual brakes)
Pardon me but my karma just ran over your dogma.

70sixpkrt



440-6pk, 4-speed, Dana 60 with 3:54  
13.01 @107.93 (street tires spinning all the way down)

c00nhunterjoe

I have factory style front discs and large rear drums. I use 1 1/32 bore on manual brakes. Stops great. Minimal effort required to stop from 125 mph.

cdr

I used the stock 68 4 drum master with disc drum set up, works great.
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr

b5blue

I used 76 Aspen MC on my 70 with 10" rear drum and 11 3/4 disk up front. All steel looks kinda stock. New not rebuilt it was not costly from Rockauto.

c00nhunterjoe

Quote from: cdr on January 25, 2018, 11:54:54 PM
I used the stock 68 4 drum master with disc drum set up, works great.

I did that initially. Will work fine until the front pistons start to move as thebpads wear. Not enough resevoir for discs.

cdr

Quote from: c00nhunterjoe on January 26, 2018, 03:06:04 PM
Quote from: cdr on January 25, 2018, 11:54:54 PM
I used the stock 68 4 drum master with disc drum set up, works great.

I did that initially. Will work fine until the front pistons start to move as thebpads wear. Not enough resevoir for discs.

Thats true, but I know to check my brake fluid level every oil change no matter what master cyl is on a car :)
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr

Daytona R/T SE

Thanks, guys !

I'm trying to figure out my brake set up, and I'd like to stay away from a big, expensive Hemi style brake booster sucking up room under my hood. ;)

I've got the front disc kit that uses '85 Chrysler Fifth Avenue discs and calipers and some 11 inch rear drums and backing plates, or I could go with 10 inch rear drums. :scratchchin:

I also need to figure out which junction/proportioning valve/block thingie to use, and what reproduction brake lines will fit. :scratchchin:

cdr

On mine I used the stock 4 drum valve & lines, non power, I bought an adjustable proportioning valve but did not need it.
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr

John_Kunkel

Quote from: cdr on January 25, 2018, 11:54:54 PM
I used the stock 68 4 drum master with disc drum set up, works great.

The RPV's in the front system are usually problematic. Reservoir size isn't an issue with good maintenance.
Pardon me but my karma just ran over your dogma.

cdr

Quote from: John_Kunkel on January 27, 2018, 07:09:49 PM
Quote from: cdr on January 25, 2018, 11:54:54 PM
I used the stock 68 4 drum master with disc drum set up, works great.

The RPV's in the front system are usually problematic. Reservoir size isn't an issue with good maintenance.


no RPV's in mine they are gone.
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
Charger55 by Charlie Keel, on Flickr