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Re: hard brake pedal ,no stop
[Re: dvw]
#1045441
08/01/11 11:59 PM
08/01/11 11:59 PM
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Joined: Jan 2003
Posts: 1,996
s. e. pa.
calrobb2000
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,996
s. e. pa.
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hi on the 66 i think you need a master cyl from a c body to get the correct preasure to the wheel cyl . and maby some larger wheel cyl . does the 70 have a proportioning valve ? also old hoses cause problems !get new ! 
Last edited by calrobb2000; 08/02/11 12:02 AM.
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Re: hard brake pedal ,no stop
[Re: dvw]
#1045442
08/02/11 12:01 AM
08/02/11 12:01 AM
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Joined: Nov 2005
Posts: 15,118
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,118
85086
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56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: hard brake pedal ,no stop
[Re: DAYCLONA]
#1045444
08/02/11 07:38 AM
08/02/11 07:38 AM
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Joined: Mar 2010
Posts: 114
Adelaide Australia
peter
member
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member
Joined: Mar 2010
Posts: 114
Adelaide Australia
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i have just done the same thing and have the same problem ive in stall hemi style brake booster and disc brakes when i drive the car ive got use both feet to try and get it to pull up pete 
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Re: hard brake pedal ,no stop
[Re: dvw]
#1045446
08/02/11 11:30 PM
08/02/11 11:30 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:
The push rod adjustment has been to long,to short,and right on. Pads are not the issue,it won't even stop well at an idle. I believe the booster is bottomed before the master has enough travel. Could a drum booster have shorter travel than a disc booster? Come to think of it this is the 3rd car I've known of with this problem. The 3rd car was a 69 Hemi Charger Originally power drum brakes converted to disc. The booster was removed and converted back to manual disc. Problem solved. Removing the power
brakes on this car is not an option.
Doug
Let's assume everything is A-OK, as far as the install and mechanical soundness of the parts,...is this car an automatic?....a healthy cam lift?, if so what is the engine vac at idle?, if it's under 12"vac, you need a vacumm resv./assist pump,...been there done that
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Re: hard brake pedal ,no stop
[Re: DAYCLONA]
#1045447
08/03/11 05:35 AM
08/03/11 05:35 AM
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Joined: Feb 2009
Posts: 982
W. Sacto CA. USA
phantomx
super stock
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super stock
Joined: Feb 2009
Posts: 982
W. Sacto CA. USA
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After what my brother just went through with his drum brakes on his Barracuda, I wouldn't overlook the pads depending on where they came from. He put new drums and shoes on the front of his 65 and it would not stop, like scary not stop. He pulled them back down and the shoes still looked new, he slapped his old shoes back on just to see and voila, stopping on a dime. A new set of Wagner shoes and he's good to go. The offending shoes were from Autozone.
Travis..
70 GTX project, orig 440-4, 4 spd, track pack, FC7, stripper/street racer special.
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Re: hard brake pedal ,no stop
[Re: phantomx]
#1045448
08/03/11 03:42 PM
08/03/11 03:42 PM
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Joined: Aug 2009
Posts: 740
Anderson, IN
1969RR
super stock
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super stock
Joined: Aug 2009
Posts: 740
Anderson, IN
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Hello, Did a 70 Challenger last year, and just today, finished a 71 Cuda...exact issue you are having!! 1st the Challenger. If you are using the valves from a 70 (two separate valves) make darn sure the lines are hooked correctly. Believe me, you can hook them up wrong! That was my problem. Could not get the car to bleed. Had a hard pedal tho. Switched the lines to the correct positions, problem solved. Now, the 71 Cuda from today. Kit came from Inline. It is to use the 70 valves. Shouldn't make a difference tho. Anyway, couldn't for the life of me get fluid to the rear. Bled, and bled..no luck. Ended up being a collapsed rear hose. Why it worked with the drum...I don't know. Replaced hose, all's good.
When you are bleeding, crack open fitting closest to master and work your way back. I bet you'll find the problem. Take care, Jeff
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Re: hard brake pedal ,no stop
[Re: DAYCLONA]
#1045449
08/03/11 06:28 PM
08/03/11 06:28 PM
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Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
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Quote:
Quote:
The push rod adjustment has been to long,to short,and right on. Pads are not the issue,it won't even stop well at an idle. I believe the booster is bottomed before the master has enough travel. Could a drum booster have shorter travel than a disc booster? Come to think of it this is the 3rd car I've known of with this problem. The 3rd car was a 69 Hemi Charger Originally power drum brakes converted to disc. The booster was removed and converted back to manual disc. Problem solved. Removing the power
brakes on this car is not an option.
Doug
Let's assume everything is A-OK, as far as the install and mechanical soundness of the parts,...is this car an automatic?....a healthy cam lift?, if so what is the engine vac at idle?, if it's under 12"vac, you need a vacumm resv./assist pump,...been there done that
Or manual brakes. I have the same issue, I'm about to drop the booster.
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Re: hard brake pedal ,no stop
[Re: Mopar_Country]
#1045450
08/03/11 08:17 PM
08/03/11 08:17 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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At this point, me I'd hookup a 1500-2000 psi gauge to the 4 corners & see if it's a psi or a pad/lining prob. You can get a 5" round gauge in that range for 10-$15 plus need several fittings to adapt it (I think the gauge is 1/4" male NPT)
live every 24 hour block of time like it's your last day on earth
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Re: hard brake pedal ,no stop
[Re: phantomx]
#1045451
08/03/11 09:46 PM
08/03/11 09:46 PM
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Joined: Sep 2004
Posts: 1,294
Under the big sky
stateline
pro stock
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pro stock
Joined: Sep 2004
Posts: 1,294
Under the big sky
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Quote:
After what my brother just went through with his drum brakes on his Barracuda, I wouldn't overlook the pads depending on where they came from. He put new drums and shoes on the front of his 65 and it would not stop, like scary not stop. He pulled them back down and the shoes still looked new, he slapped his old shoes back on just to see and voila, stopping on a dime. A new set of Wagner shoes and he's good to go. The offending shoes were from Autozone.
Travis..
How are the carbon metallic shoes Firm Feel sells ?? Ive been having poor stopping on my street rod, Im sure its the shoes on it
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Re: hard brake pedal ,no stop
[Re: dvw]
#1045453
08/04/11 12:06 AM
08/04/11 12:06 AM
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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:
It does have the stock drum brake valves.
Doug
get rid of the drum distribution block, use the correct proportioning valve,... are you using a drum/drum master or the correct disc/drum master?????????
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Re: hard brake pedal ,no stop
[Re: TheRamMan]
#1045458
08/05/11 02:50 PM
08/05/11 02:50 PM
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Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
BradD
mopar
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mopar
Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
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A POWER DRUM booster will not work with disc brakes!
We just went through this on a 68 Charger R/T. We put all of the disc brake parts on the car except for the original Power drum booster that was originally on the car. We had a hard pedal but the car was not stopping well. Changed to a Power Disk booster and stops great now.
Brad
Dorn Restorations
Check out the Dorn's 69 Barracuda "Switchblade" in the Nov.2010 MCG
Check out the Dorn's refurbished 36 Ford in the Feb.2011 Street Rodder
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