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Old 05-02-2003, 12:09 AM
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Post disc brakes

I am swapping my drum brakes out for a set of disc brakes......I have a 66 Impala and I am using a adapter plate to run 72 Chevelle Disc Brakes.....Can I use Disc Brakes with a non power master cylinder???

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Old 05-02-2003, 07:16 AM
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No. Disc brakes require a greater volume of fluid to be moved and greater pressures. The stock manual cylinder would not be able to supply this. I believe there are larger bored manual cylinders that can accomodate this, but since you would need a new master cylinder, just go with power brakes all the way. Their is also the issue of valving since the disc calipers act differently than the rear drums (I am assuming you are only changing the front) You would need a proportioning valve to get the car to brake correctly and keep the rear wheels from locking up. There are quite a few aftermarket companies that sell power booster / master cylinder / proportioning valve setups.
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Old 05-02-2003, 06:15 PM
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Yes you can run the disc brake set-up with using a booster. You'll want to install a disc/drum master cylinder for non-power brakes. You also need to be sure the actuating rod from the master cylinder to the pedal arm is on the upper hole so you get more pedal leverage when applying the brakes....since you will not have the assistance of a booster to apply the brakes. You also need to switch the combination valve to one from a Impala that had the disc/drum unit for proper braking.
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