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Restoration Advice

220 messages,  Last post on May 31, 2009 at 5:49 PM

You are in the Classic Cars Forum. Your Host is mr_shiftright

What is this discussion about? Performance Mods, Auto Body, Auto Repair, Classic Cars, Coupe, Convertible, Truck, Sedan, Wagon


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#41 of 220
Re: HELP - 1957 Chevy front power disk brakes [0patience] by inkspot43
Aug 04, 2007 (11:45 am)
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Replying to: 0patience (Aug 03, 2007 4:24 pm)

The rear brakes are drum, and there is a proportioning valve. The brakes do not drag at all. The brakes are rock hard when car is off and there is no vacuum. I have tried 3 master cylinders, and 2- 7" dual diaphram power boosters. Yesterday I installed a new proportioning valve. The vacuum is 19" at an idle. Since installing the new proportioning valve I seem to have good power brakes the first time I hit the pedal, if I take my foot off the brake and hit it again right away it is as if the power booster isn't working and I have to stand on the brakes to get the car to stop. Any ideas?
#42 of 220
Re: HELP - 1957 Chevy front power disk brakes [inkspot43] by omarman
Aug 04, 2007 (2:45 pm)
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Replying to: inkspot43 (Aug 04, 2007 11:45 am)

The brakes do not drag at all. The brakes are rock hard when car is off and there is no vacuum...I seem to have good power brakes the first time I hit the pedal, if I take my foot off the brake and hit it again right away it is as if the power booster isn't working and I have to stand on the brakes to get the car to stop. Any ideas?
 
That sounds like a vacuum leak either from a line or a "T" fitting.
#43 of 220
Re: HELP - 1957 Chevy front power disk brakes [inkspot43] by 0patience
Aug 04, 2007 (7:49 pm)
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Replying to: inkspot43 (Aug 04, 2007 11:45 am)

I'd have to agree with omarman,
It sounds like either you have the vacuum hose hooked to the wrong port on the manifold, the check valve isn't working properly or you have a leak in the booster.
#44 of 220
Re: HELP - 1957 Chevy front power disk brakes [0patience] by Mr_Shiftright HOST
Aug 05, 2007 (6:49 am)
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Replying to: 0patience (Aug 04, 2007 7:49 pm)

Me, too. Vacuum supply problem.
#45 of 220
Re: HELP - 1957 Chevy front power disk brakes [Mr_Shiftright] by texases
Aug 05, 2007 (11:34 am)
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Replying to: Mr_Shiftright (Aug 05, 2007 6:49 am)

Might he be able to check a vacuum problem by pushing on the brake pedal without the master cylinder bolted to the booster? If the pedals drops to the floor, there's a vacuum problem. If the pedal's firm, then a linkage/push rod problem.
#46 of 220
Re: HELP - 1957 Chevy front power disk brakes [inkspot43] by isellhondas
Aug 05, 2007 (2:28 pm)
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Replying to: inkspot43 (Aug 01, 2007 5:46 pm)

I don't have a solution but I do have a question...
 
Why would you want to make that 57 Chevy non original?
 
Oh, I know, the disks are far superior but the original drums with power assist weren't bad either.
 
I love old cars but I'm one of those guys that with the exception of seat belts likes them stock.
 
Just curious that's all...
#47 of 220
Re: HELP - 1957 Chevy front power disk brakes [isellhondas] by Mr_Shiftright HOST
Aug 05, 2007 (4:01 pm)
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Replying to: isellhondas (Aug 05, 2007 2:28 pm)

There's a growing trend...a WAVE actually, to use and enjoy classic cars, and this requires upgrading brakes, suspension, etc. As long as no holes are drilled and the old parts are kept, no harm done to the car or its value.
 
The only justification for keeping an old classic with stock brakes, tires and suspension is if you are showing it to be judged. Otherwise, to suffer awful braking and handling, or chronic overheating and bad radio reception for the sake of authenticity seems, to me, and to a lot of other car enthusiasts, as something just a bit too fanatical.
#48 of 220
I guess I'm a fanatic... by isellhondas
Aug 05, 2007 (7:40 pm)
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Because I happen to think that when driven sensibly as one would think old cars would be that the origianl equipment brakes and suspension would be more than up to the task.
 
I don't think braking was **that** awful nor did I see many cars overheat unless something was wrong.
 
I just hate to see an old car "Mickey Moused" but, that's me.
 
These are weekend drivers, not urban battle cars.
 
Holes do get drilled and old cars become something other than what they were.
#49 of 220
Re: I guess I'm a fanatic... [isellhondas] by 0patience
Aug 05, 2007 (7:59 pm)
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Replying to: isellhondas (Aug 05, 2007 7:40 pm)

I see your point. A lot of purists would prefer that they be kept stock.
But there are a lot of companies now that are making direct bolt on kits for brakes, transmissions, rear ends and fuel injection.
Most of these kits do not harm the original parts of the vehicle and can be restored easily to stock.
 
I've done several modifications to add fuel injjection and they don't harm the vehicle at all.
#50 of 220
Re: I guess I'm a fanatic... [0patience] by isellhondas
Aug 06, 2007 (6:11 am)
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Replying to: 0patience (Aug 05, 2007 7:59 pm)

Well, if the car can be returned to stock it wouldn't be so bad.
 
But, these aren't usually daily drivers. I just don't understand why people feel these mods are necessary?
 
A well tuned carb works just fine. Don't tailgate people or try to take turns at excessive speeds and all of these conversions are totally unnecessary.
 
These people shouild just use their daily drivers for this.
 
At the car shows, I am always attracted to the "survivor" cars and not the "Trailer Queens" that have been over restored or the cars that have been Mickey Moused
 
er...modified to make them "better".
 
But, again, that's me.

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