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Re: Strange front brake dilema [Re: TheBlackCar] #1320398
10/15/12 06:21 PM
10/15/12 06:21 PM
Joined: Dec 2009
Posts: 20,639
in a cattle trailer down by th...
G
Guitar Jones Offline
Paddle faster! I hear banjo music!
Guitar Jones  Offline
Paddle faster! I hear banjo music!
G

Joined: Dec 2009
Posts: 20,639
in a cattle trailer down by th...
Quote:

MP master cylinders were roughly 70/30 front to rear. Your putting the majority of fluid to the aftermarket front disc (better) brakes, which end up being the only thing stopping the car (ie reason for heat).

Been thru this one a few times

Good Luck




I think it's more like 60/40.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: Strange front brake dilema [Re: Guitar Jones] #1320399
10/15/12 06:24 PM
10/15/12 06:24 PM
Joined: Dec 2005
Posts: 1,495
Shelby mi.
J
JAKE68 Offline
pro stock
JAKE68  Offline
pro stock
J

Joined: Dec 2005
Posts: 1,495
Shelby mi.
Quote:

Quote:

MP master cylinders were roughly 70/30 front to rear. Your putting the majority of fluid to the aftermarket front disc (better) brakes, which end up being the only thing stopping the car (ie reason for heat).

Been thru this one a few times

Good Luck




I think it's more like 60/40.



Depends on which model of vehical it was originaly intended for.


JAKES AUTOMOTIVE
Re: Strange front brake dilema [Re: Guitar Jones] #1320400
10/15/12 06:29 PM
10/15/12 06:29 PM
Joined: Mar 2008
Posts: 307
OH
T
TheBlackCar Offline
enthusiast
TheBlackCar  Offline
enthusiast
T

Joined: Mar 2008
Posts: 307
OH
63/37 and 69/31 if we need to be exact. Thought "roughly 70/30" was close enough.

Re: Strange front brake dilema [Re: TheBlackCar] #1320401
10/15/12 06:42 PM
10/15/12 06:42 PM
Joined: Jan 2005
Posts: 83
Manchester , Md.
6
67446DART Offline OP
member
67446DART  Offline OP
member
6

Joined: Jan 2005
Posts: 83
Manchester , Md.
Thanks for all the suggestions on this I am really getting frustrated with the car to be honest! I guess I should start at the begining and say I got the front end on including the brakes in question , I think there were about 2 or 3 turns on the valve at this point and took it to my local track 75/80 and made (4) 1/4 mile passes it did the same stuff I mentioned before.I took it home turned the rotors and put new pads in and turned the proportioning valve all the way back....this is where I am now.

car has stainless front lines on it.I keep the car at my dads place so the next time I get over there i will try some of your suggestions...Thanks all!!


67 Dart GT 10.5,mild,446,727,906heads,minitubbed,leafs,caltracks,410's,3290#w/out driver,10:87 @123w/ a 1.53 60ft
Re: Strange front brake dilema [Re: 67446DART] #1320402
10/15/12 06:46 PM
10/15/12 06:46 PM
Joined: Jan 2005
Posts: 83
Manchester , Md.
6
67446DART Offline OP
member
67446DART  Offline OP
member
6

Joined: Jan 2005
Posts: 83
Manchester , Md.
this is a link to pic's of my car if you want to see what it looks like...

http://www.lbsr.org/DavesDart.html


67 Dart GT 10.5,mild,446,727,906heads,minitubbed,leafs,caltracks,410's,3290#w/out driver,10:87 @123w/ a 1.53 60ft
Re: Strange front brake dilema [Re: 67446DART] #1320403
10/15/12 07:11 PM
10/15/12 07:11 PM
Joined: Dec 2005
Posts: 1,495
Shelby mi.
J
JAKE68 Offline
pro stock
JAKE68  Offline
pro stock
J

Joined: Dec 2005
Posts: 1,495
Shelby mi.
Quote:

Thanks for all the suggestions on this I am really getting frustrated with the car to be honest! I guess I should start at the begining and say I got the front end on including the brakes in question , I think there were about 2 or 3 turns on the valve at this point and took it to my local track 75/80 and made (4) 1/4 mile passes it did the same stuff I mentioned before.I took it home turned the rotors and put new pads in and turned the proportioning valve all the way back....this is where I am now.

car has stainless front lines on it.I keep the car at my dads place so the next time I get over there i will try some of your suggestions...Thanks all!!



To put more pressure to the rears u turn the prop valve in. Out restricts pressure to rears. Believe me I did it wrong for years.


JAKES AUTOMOTIVE
Re: Strange front brake dilema [Re: JAKE68] #1320404
10/15/12 08:22 PM
10/15/12 08:22 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
What you guys are reading in that 70/30 split is NOT
the valving... its the volume of the reservoirs...
if the car noses over then yes the rear gets lite
BUT MOST of use have strong springs in the front and
SKINNY tires... all the cars I have built with skinny
front tires get the prop valve installed in the front
lines to keep from locking up the fronts on a spike

Re: Strange front brake dilema [Re: moparniac] #1320405
10/15/12 08:54 PM
10/15/12 08:54 PM
Joined: Jan 2005
Posts: 83
Manchester , Md.
6
67446DART Offline OP
member
67446DART  Offline OP
member
6

Joined: Jan 2005
Posts: 83
Manchester , Md.
Quote:

Quote:

Hi All,
car weights 3120lbs without driver...




Quote:

i realize this is of no help but that is a race brake setup and imho should not be used on any street driven car.




my car is 3400 with driver (I am 250)and they work fine for me! I posted this question a while back on the bullet and Larry Larson even replied and Jeff Lutz ran the strange brakes up front also (yes the thinner strange ones)If them 2 guys don't have issues with their 200mph street cars and "race only brakes"... something else is wrong with your setup

go to 2:00 in the video. brakes look familiar. lutz is 3600lbs in that car also.

http://www.youtube.com/watch?v=K7xOOOh89a8




interesting....what master cylinder are you using?


67 Dart GT 10.5,mild,446,727,906heads,minitubbed,leafs,caltracks,410's,3290#w/out driver,10:87 @123w/ a 1.53 60ft
Re: Strange front brake dilema [Re: Guitar Jones] #1320406
10/16/12 12:19 AM
10/16/12 12:19 AM
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff Offline
master
DoctorDiff  Offline
master

Joined: Jan 2003
Posts: 8,016
Polson, MT
The prop valve may be installed in the front line if you are running "skinny" front tires. In this case, you must rely on the rear brakes to do the majority of the work because the front tires lack the necessary tread width to stop the car.

This is not ideal, but it is better than the alternative.

Re: Strange front brake dilema [Re: DoctorDiff] #1320407
03/16/13 05:23 PM
03/16/13 05:23 PM
Joined: Jan 2005
Posts: 83
Manchester , Md.
6
67446DART Offline OP
member
67446DART  Offline OP
member
6

Joined: Jan 2005
Posts: 83
Manchester , Md.
Ok thanks for all the replys....Spring is approching and I want to get my car going again! I am contumplating buying different style aftermarket brakes or going back to stock style.....in that case I will be looking for some of the stock hardware if you are reading this and have some of it message me!

I forgot to mention I still am running a (new) stock 73 duster proportioning valve as well in addition to everthing else above.
Thanks for your time all!


67 Dart GT 10.5,mild,446,727,906heads,minitubbed,leafs,caltracks,410's,3290#w/out driver,10:87 @123w/ a 1.53 60ft
Re: Strange front brake dilema [Re: 67446DART] #1320408
03/17/13 01:39 AM
03/17/13 01:39 AM
Joined: Aug 2003
Posts: 43,141
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,141
Bend,OR USA
Make sure your master cylinder does not have a residual pressure valve in the part feeding the front brakes Some of the Mopar aluminum master cylinfers had them in both ends is what someone on here said, probally the ones for the ealry K cars, is what I remember The master cylinder rod adjustment from the brake pedal will do that also


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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