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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

brake question??

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Old Dec 19, 2005 | 04:52 PM
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brake question??

for you engineers....what would happen if you increaced your master cylinder diameter( like going from 1" to 1 1/16) would pressure increase, or remain the same and just increace volume???

thanks Jim
 
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Old Dec 19, 2005 | 05:50 PM
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You'd need about 13% more force from your leg to get the same pressure in the MC (and at the brakes). On the plus side, you get about 6% more fluid volume for a given movement of the MC rod.
 
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Old Dec 19, 2005 | 05:53 PM
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That must be why the boosters are so big.
 
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Old Dec 19, 2005 | 06:38 PM
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thanks George....so if I'm understanding this right..if I was to decrease the master cylinder bore size to a smaller size it would increase pressure??? but then I might not have enough volume...
 
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Old Dec 19, 2005 | 06:54 PM
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With a smaller diameter and the same foot pressure on the pedal, you'll get higher pressure out of the MC. You'll also get less volume of fluid for a given amount of MC rod movement.
 
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Old Dec 19, 2005 | 06:59 PM
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thanks again George, sorry for not posting this in the brake forum, but this seems like a better place for this type of question concerning older trucks

JIM
 
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