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Old 08-02-2013, 09:01 PM
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Power or manual brakes?

Just started a 1937 chevy coupe pro street projectthat another owner started but couldnt finish.he install a manual brake master and i was wondering if there is an advantage to manual or should i go power? Fisrt time i have built a car from scratch

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Old 08-02-2013, 09:12 PM
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Manual brakes will stop the car, manual drums will stop the car in no particular direction if wet or not properly adjusted, manual discs will usually stop straight, but require more force from the driver than power brakes to stop. I guess it is a preference thing, but I would go with power discs if budget will allow it. JMO

Kelly
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Old 08-03-2013, 12:29 PM
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Originally Posted by carolinacustoms View Post
Manual brakes will stop the car, manual drums will stop the car in no particular direction if wet or not properly adjusted, manual discs will usually stop straight, but require more force from the driver than power brakes to stop. I guess it is a preference thing, but I would go with power discs if budget will allow it. JMO

Kelly
A properly designed manual disc system stops just fine. I've got factory manual discs in my 1970 W-30 and I've never felt the need for power. The M/C uses a smaller bore and the pedal ratio is different, so the brake force at the pedal is no more than needed for a power system. Only the pedal travel is longer, which is no big deal if you are used to it.
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Old 08-03-2013, 12:40 PM
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Originally Posted by joe_padavano View Post
A properly designed manual disc system stops just fine. I've got factory manual discs in my 1970 W-30 and I've never felt the need for power. The M/C uses a smaller bore and the pedal ratio is different, so the brake force at the pedal is no more than needed for a power system. Only the pedal travel is longer, which is no big deal if you are used to it.

True enough, I guess more travel in the pedal instead of more force is a better wording/explaination. I have gotten spoiled by the power systems, but like I said theres nothing wrong with a manual system.

Kelly
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Old 08-03-2013, 01:29 PM
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Another thing that should be mentioned about power brakes is what kind of vacuum does the engine deliver? I'm not 100% sure off the top of my head but I believe that you should have at least 14 inches of vacuum for them to operate correctly. Some people use a vacuum canister for an engine that is borderline.

If that is an issue there are also companies that offer GM's hydraboost assist that work really well. It runs off from the power steering pump. You usually only get a couple of pumps from these systems if the engine dies and then the pedal is very hard to push to get any braking. Probably similar to a vacuum system.
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