brake issue
#1401485
03/12/13 08:54 PM
03/12/13 08:54 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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robin hood country
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I have just fitted new shoes and one wheel cylinder on the front of my 67 Coronet, i've had the rears to peces as well, replacing one of the rear wheel cylinders. I wire brushed the drums and cleaned them thoroughly with brake cleaner, adjusted and bled them. There is no power assist on the brakes. Anyway, i drove it today and they are absolutely rubbish. I think i'd slow down quicker if i put a stick in the wheel. If someone pulled out on me, i'd never pull up.
Should i have roughed the shoes up a little before fitting them ?
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: brake issue
[Re: RapidRobert]
#1401489
03/13/13 05:24 AM
03/13/13 05:24 AM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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robin hood country
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These aren't power brakes they're manual.
I adjusted them untill they were tight, then backed them off a little.
The front shoes were worn out, the backs had loads of meat on them.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: brake issue
[Re: deaks]
#1401490
03/13/13 12:14 PM
03/13/13 12:14 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Oh OK manual. Nothing in your descrip is apparent. If there ain't excessive pedal travel then the shoes are adjusted tight enough & if they dont pump up then it's not air. The M/C was not replaced. I'd do another visual on all 4 corners & see if anything is apparent or jack up the fronts & spin the wheels by hand & have a helper work the pedal then jack up the rear axle & idle it in gear/work the pedal & see what you see. The symptoms sound like inadequate psi from a pinched line/hose if the travel/air ain't the culprit but I'm not seeing how that could have happened. Holler how it goes
live every 24 hour block of time like it's your last day on earth
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Re: brake issue
[Re: RapidRobert]
#1401492
03/13/13 02:18 PM
03/13/13 02:18 PM
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Joined: Sep 2003
Posts: 1,168
Vancouver, WA
MoparMarq
super stock
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super stock
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Posts: 1,168
Vancouver, WA
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Quote:
No but more details on what's going on, Are the shoes spooned up tight (how much pedal travel)? do they pump up briefly with quick/fast pumps? Were they Ok before being rebuilt other than being worn out (what were the symptoms?)
Is the pedal getting firm on application? Does it firm up at the proper rate? Does the pedal get firm at the typical location? Hard to diagnose without some more info. With new shoes, properly adjusted, new wheel cylinders, the only thing left I can think of of soft/bad front (or both front/rear) hose(s). Do the rears lock up first on hard pedal pressure, or at all?
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Re: brake issue
[Re: deaks]
#1401493
03/13/13 02:44 PM
03/13/13 02:44 PM
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Joined: Aug 2003
Posts: 43,286
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,286
Bend,OR USA
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Last edited by Cab_Burge; 03/13/13 02:51 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: brake issue
[Re: Twostick]
#1401495
03/13/13 03:30 PM
03/13/13 03:30 PM
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Joined: Sep 2003
Posts: 1,168
Vancouver, WA
MoparMarq
super stock
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super stock
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Posts: 1,168
Vancouver, WA
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Quote:
I seem to recall that there is a leading and trailing shoe. If you install them backwards they will perform badly. I can't remember how to tell them apart if they aren't marked, but I would check this first.
Kevin
Front shoe of set at a particular wheel has the shorter of the two linings; longer lining is on the rear shoe of the pair. Worth checking...
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Re: brake issue
[Re: MoparMarq]
#1401496
03/13/13 04:12 PM
03/13/13 04:12 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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robin hood country
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Ah, right, i didn't know that. Would that make a lot of difference.
Thanks Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: brake issue
[Re: Cab_Burge]
#1401499
03/13/13 04:55 PM
03/13/13 04:55 PM
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Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
nomore65BelvJim
I Live Here
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I Live Here
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Posts: 16,844
Phoenix - surface of the sun
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Quote:
I don't remember the term for having the new brake shoes tapered on the ends so all of the shoe will conatct all of the drum when first installed, sorry.
Re-arching.
The ends are left alone. The center of the arch is reduced and its tapered to nothing removed on the ends to make them match the larger diameter of the turned drum.
Any shop that relines shoes should have the equipment to re-arch.
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Re: brake issue
[Re: Paul_Fancsali]
#1401500
03/13/13 07:45 PM
03/13/13 07:45 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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robin hood country
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Quote:
Frankly having driven those cars new the drum brakes just plain suck. Do a disc conversion and save your life or that of any other car around you. By the way only buy new brakes if you have to keep using the drum brakes the relined are absolute junk
Did you happen to change the size of master cly? That will make a big difference in pedal pressure.
If the brakes are 10 X 2.5 in front read the above and save your time
Thanks for some good answers.
First of all, the shoes were the wrong way round on the drivers side and were doing almost nothing, compared to the pass side. Also a little more adjustment is needed on both sides.
Paul
I'd rather spend money trying to get my Dart into the 9's to be honest. 
Mick
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: brake issue
[Re: deaks]
#1401502
03/13/13 08:48 PM
03/13/13 08:48 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Frankly having driven those cars new the drum brakes just plain suck. Do a disc conversion and save your life or that of any other car around you. By the way only buy new brakes if you have to keep using the drum brakes the relined are absolute junk
Did you happen to change the size of master cly? That will make a big difference in pedal pressure.
If the brakes are 10 X 2.5 in front read the above and save your time
Thanks for some good answers.
First of all, the shoes were the wrong way round on the drivers side and were doing almost nothing, compared to the pass side. Also a little more adjustment is needed on both sides.
Paul
I'd rather spend money trying to get my Dart into the 9's to be honest.
Mick
Mick
You want to run 9s with drum brakes?? 
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to the drum 
