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Brake Master Cyl Questions #928695
02/14/11 01:59 PM
02/14/11 01:59 PM
Joined: Jan 2008
Posts: 602
Alexandria, VA
SealockRacing Offline OP
mopar
SealockRacing  Offline OP
mopar

Joined: Jan 2008
Posts: 602
Alexandria, VA
whats up guys, been a while since ive been on here, just havent had time or money to fool with the 'cuda. things seem to be heading in the right direction and i need some help with the brakes.

the car had an old factory M/C on it when i started messing with it. i put a new bendix unit that i found in the garage, turned out to be no good after it sat for a while...

anyways, im looking to get a brand new master cylinder and was wondering what you guys reccomend? the car has im guessing 10" drums in the rear? and it has front disc, wilwood 4 pistons. no proportioning valve, just tee'd to the front and rear.
any suggestions? id rather not replumb everything, but just fix what i got.

thanks in advance!

Re: Brake Master Cyl Questions [Re: SealockRacing] #928696
02/14/11 05:32 PM
02/14/11 05:32 PM
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581 Offline
master
Chris2581  Offline
master

Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
I like the Mopar master cylinder that Ehernberg sells.I've had one for many years and it works great.


Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: Brake Master Cyl Questions [Re: SealockRacing] #928697
02/14/11 05:37 PM
02/14/11 05:37 PM
Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
bigsbigelow Offline
pro stock
bigsbigelow  Offline
pro stock

Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
I have the Strange Engineering unit. It is expensive and I am not even sure if it is any different than the Mopar unit but man does my car stop fast for basically a stock brake system. The Strange cylinder is used in conjunction with a stock '73 A-body brake system. IIRC it is a .125" bore.


Ryan "Bigs" '73 Duster (BLKDUST) - Black, 100% factory sheet metal, flat hood, 346 cid, J Heads, and a bench seat. http://s268.photobucket.com/albums/jj1/bigsbigelow/ Best to date: 12.40 @ 109 mph
Re: Brake Master Cyl Questions [Re: Chris2581] #928698
02/14/11 07:28 PM
02/14/11 07:28 PM
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED Offline
master
HEMIFRED  Offline
master

Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
link below

Cylinder Part Numbers sizing also

http://www.dragstuff.com/techarticles/RacingMasterCylPN.html


home of the
Sox and Martin Hemi Duster


Re: Brake Master Cyl Questions [Re: HEMIFRED] #928699
02/14/11 08:16 PM
02/14/11 08:16 PM
Joined: Jan 2008
Posts: 449
Wisconsin
sjs64polara Offline
mopar
sjs64polara  Offline
mopar

Joined: Jan 2008
Posts: 449
Wisconsin
Quote:

link below

Cylinder Part Numbers sizing also

http://www.dragstuff.com/techarticles/RacingMasterCylPN.html





VERY COOL LINK

Re: Brake Master Cyl Questions [Re: SealockRacing] #928700
02/14/11 08:54 PM
02/14/11 08:54 PM
Joined: Jan 2003
Posts: 5,894
Florida
Locomotion Offline
master
Locomotion  Offline
master

Joined: Jan 2003
Posts: 5,894
Florida
I have OEM manual discs and 10" drums with original proportioning valve on my Dart Sport. I installed a Cardone reman. 1821 m/c on it with an adapter and it's worked well. It's listed for a manual disc/drum Aspen/Volare application. (Forgot what years.) The Cardone 1822 # is for power brake applications but I don't know how that would affect it's performance with manual brakes.
Haven't tried using it without a proportiong valve yet. Also heard some talk about swapping the lines to direct more pressure to the rear because of the bigger tires. But haven't tried it or heard any conclusive evidence it would help.

I also have a Cardone 1860 which is for a manual brake truck application that I'm considering trying when I install aftermarket brakes up front. The bigger the piston area of the brakes, the bigger the m/c bore should be. But each combo as well as personal preference for brake "feel" will influence the final choice.

The FWD master cylinders should not be used in a drag racing/RWD application. They are proportioned differently.

A while back at a junk yard, I collected a few extra resevoirs from full size trucks & vans. The extra capacity doesn't hurt and will just require trimming some of the tabs underneath to make them fit a passenger car m/c.

Last edited by Locomotion; 02/14/11 08:57 PM.
Re: Brake Master Cyl Questions [Re: Locomotion] #928701
02/14/11 11:02 PM
02/14/11 11:02 PM
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4 Offline
master
rowin4  Offline
master

Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
I replaced mine with late 70's pick up master cylinder , drum / disc 4 bolt cast iron , bolted right up from Orielly's , used a proportioning valve from Jegs.



it's ok to butt heads, just don't do it with a butthead
Re: Brake Master Cyl Questions [Re: Chris2581] #928702
02/14/11 11:07 PM
02/14/11 11:07 PM
Joined: Jan 2007
Posts: 526
NC
B
barracuda man Offline
mopar
barracuda man  Offline
mopar
B

Joined: Jan 2007
Posts: 526
NC
Quote:

I like the Mopar master cylinder that Ehernberg sells.I've had one for many years and it works great.


nice master cylinder.

Re: Brake Master Cyl Questions [Re: SealockRacing] #928703
02/14/11 11:19 PM
02/14/11 11:19 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
It will make a difference what size master you put on
it if the pedal ratio has been changed

Re: Brake Master Cyl Questions [Re: HEMIFRED] #928704
02/15/11 12:04 AM
02/15/11 12:04 AM
Joined: Feb 2011
Posts: 3
CA California
T
terminal blocks Offline
member
terminal blocks  Offline
member
T

Joined: Feb 2011
Posts: 3
CA California
Quote:

link below

Cylinder Part Numbers sizing also

http://www.dragstuff.com/techarticles/RacingMasterCylPN.html




nice find, i'd definitely go with this one!

Re: Brake Master Cyl Questions [Re: terminal blocks] #928705
02/15/11 01:46 AM
02/15/11 01:46 AM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline
master
rebel  Offline
master

Joined: Dec 2006
Posts: 4,647
aotearoa
i found the master cylinder in an A body was a pain in the perverbial when it came to pulling rocker covers so i fitted a willwood unit with remote reservoirs inside the car on top of the brake pedal assy. it took a little bit of fabrication but with no master cylinder in the engine bay now lifes a lot easier servicing between rounds.

Re: Brake Master Cyl Questions [Re: rebel] #928706
02/15/11 11:37 AM
02/15/11 11:37 AM
Joined: Mar 2009
Posts: 1,058
bigfork mn
D
dragram440 Offline
super stock
dragram440  Offline
super stock
D

Joined: Mar 2009
Posts: 1,058
bigfork mn
I have some brake issues also. I have a master from a mid 90's Ram truck 2wd and it is for power brakes and I have manual stock rear drum and stock front discs off a diplomat and just ran the lines with no prop valve and I seem to have a very hard pedal. Basically takes bolth feet to stop it but they seem to work good other then the hard pedal. I was thinking it might be the rod angle to the master. It is going uphill just a little. Anyone have any ideas?

Last edited by dragram440; 02/15/11 11:38 AM.

67' charger 499 RB 10.57 at 127
Re: Brake Master Cyl Questions [Re: dragram440] #928707
02/15/11 12:09 PM
02/15/11 12:09 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

I have some brake issues also. I have a master from a mid 90's Ram truck 2wd and it is for power brakes and I have manual stock rear drum and stock front discs off a diplomat and just ran the lines with no prop valve and I seem to have a very hard pedal. Basically takes bolth feet to stop it but they seem to work good other then the hard pedal. I was thinking it might be the rod angle to the master. It is going uphill just a little. Anyone have any ideas?




Measure the bore in your master cylinder and go with
a little smaller bore... it will decrease the effort
you need

Re: Brake Master Cyl Questions [Re: MR_P_BODY] #928708
02/15/11 12:40 PM
02/15/11 12:40 PM
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED Offline
master
HEMIFRED  Offline
master

Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
Quote:

Quote:

I have some brake issues also. I have a master from a mid 90's Ram truck 2wd and it is for power brakes and I have manual stock rear drum and stock front discs off a diplomat and just ran the lines with no prop valve and I seem to have a very hard pedal. Basically takes bolth feet to stop it but they seem to work good other then the hard pedal. I was thinking it might be the rod angle to the master. It is going uphill just a little. Anyone have any ideas?




Measure the bore in your master cylinder and go with
a little smaller bore... it will decrease the effort
you need




DON'T FORGET TO MAKE SURE YOUR MASTER CYLINDER ROD HAS A WAY OF BEING RETAINED . IT CAN FALL OUT.
this article addresses what to do regarding the pedal ratio to decrease the amount of pressure needed to make stopping easier http://www.dragracingonline.com/technical/vi_5-cylinders-print.html


home of the
Sox and Martin Hemi Duster


Re: Brake Master Cyl Questions [Re: HEMIFRED] #928709
02/15/11 02:21 PM
02/15/11 02:21 PM
Joined: Jan 2008
Posts: 602
Alexandria, VA
SealockRacing Offline OP
mopar
SealockRacing  Offline OP
mopar

Joined: Jan 2008
Posts: 602
Alexandria, VA
thanks guys! think you all pointed me in the right direction. i got back on rockauto and found a master cyl for a 73 duster, manual brakes-front disc, rear drum made by raybestos. its brand new for 60 bucks. would that be what i need?

and another question, do i need a factory type prop valve? the car has a line lock for the fronts which i need to replace, and the line coming out of the line lock goes to the left front wheel where it is tee'd to the right front wheel. for the rear, it just comes out of the master cyl and goes to the back of the car. is there a need for a factory prop valve? or even an adjustable prop valve?

Re: Brake Master Cyl Questions [Re: SealockRacing] #928710
02/15/11 03:09 PM
02/15/11 03:09 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

thanks guys! think you all pointed me in the right direction. i got back on rockauto and found a master cyl for a 73 duster, manual brakes-front disc, rear drum made by raybestos. its brand new for 60 bucks. would that be what i need?

and another question, do i need a factory type prop valve? the car has a line lock for the fronts which i need to replace, and the line coming out of the line lock goes to the left front wheel where it is tee'd to the right front wheel. for the rear, it just comes out of the master cyl and goes to the back of the car. is there a need for a factory prop valve? or even an adjustable prop valve?




You wont want the factory prop valve... but you would
want the adjustable prop valve.... reason is you
arent using the factory sized tires and the car doesnt
have the stock weight balance anymore

Re: Brake Master Cyl Questions [Re: MR_P_BODY] #928711
02/15/11 03:55 PM
02/15/11 03:55 PM
Joined: Jan 2008
Posts: 602
Alexandria, VA
SealockRacing Offline OP
mopar
SealockRacing  Offline OP
mopar

Joined: Jan 2008
Posts: 602
Alexandria, VA
so mr p body, i would want that master cyl, run the front lines like they are with the line lock in there, and then add the adj. prop valve for the rear lines?

any brand or preference for both the line lock solenoid and adj. prop valve?

Re: Brake Master Cyl Questions [Re: SealockRacing] #928712
02/15/11 04:09 PM
02/15/11 04:09 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

so mr p body, i would want that master cyl, run the front lines like they are with the line lock in there, and then add the adj. prop valve for the rear lines?

any brand or preference for both the line lock solenoid and adj. prop valve?





If your running skinny tire in front you want the
adjustable valve on the fronts... otherwise the fronts
will lock up on a hit of the brakes... you want the
rears doing most of the work now with their large size

Re: Brake Master Cyl Questions [Re: dragram440] #928713
02/15/11 06:34 PM
02/15/11 06:34 PM
Joined: Feb 2009
Posts: 1,274
Ontario.Canada
C
can.al Offline
pro stock
can.al  Offline
pro stock
C

Joined: Feb 2009
Posts: 1,274
Ontario.Canada
get a smaller master...1 inch.
when we bore our engines we put in larger pistons.
when master cyl are rebuilt they are honed and the same pistons are installed so some eventually leak,
if possible get a new one...i like master power stuff!

Re: Brake Master Cyl Questions [Re: can.al] #928714
02/16/11 09:05 AM
02/16/11 09:05 AM
Joined: Jan 2008
Posts: 602
Alexandria, VA
SealockRacing Offline OP
mopar
SealockRacing  Offline OP
mopar

Joined: Jan 2008
Posts: 602
Alexandria, VA
so run the rears straight from the master to the wheel cyls basically. and run the line for the fronts from the master cyl, then to the line lock, out of the line lock to the fronts? the car has 7.10x15 Moroso Frontrunners.

also, the master cylinder im looking at getting is 1 1/32" bore. that sound about right?

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