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Old 04-28-2008, 06:22 PM
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Master Cylinder Help Needed

I am building a 1989 S10 drag race project. The truck right now has the factory master cylinder and brake booster which I would like to get rid of to make more room on the firewall and to clean things up. I have been looking at aftermarket manual master cylinders. What is so different from the master cylinders you use with power brakes and the older manual type? Can you take the master cylinder off the booster and use it as a manual type?


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Old 04-28-2008, 06:28 PM
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no.. you can't use a power M/C for non power brakes, the bore is too big. also the pedal ratios are different. but really, it's a drag truck and your gonna want to stop it easilly.. keep the booster
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Old 04-28-2008, 07:30 PM
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keep the power brakes, ypu wanna get rid of anything get rid of the heater and all that goes with it and then just close up the holes in the firewall thats what i did with my S10
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Old 04-28-2008, 09:13 PM
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Just go to the j/y and pick up the pedal assembly from a manual brake S10. Then get a rebuilt manual brake S10 master cylinder from the parts store (and the rear wheel cylinders if you are keeping the stock rear end).
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Old 04-28-2008, 10:23 PM
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Quick tip...The bigger the master cylinder is, the more fluid you will have but you wll have less pressure at the caliper. If you do make the swap you may want to install an adjustable proportioning valve. Because of the added weight to the front and knowing how light the rear of the S-10 is you may want to be able to adjust the brakes manually. Another option to clean up the firewall would be to install a frame mounted master or under dash style both would work. If you do install a frame style you will also need residual valves front and rear.

Last edited by RODDER18; 04-28-2008 at 10:31 PM.
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