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Old 07-07-2011, 06:07 PM
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68 mustang hard brake pedal

Hey guys i have a 68 mustang with disc brakes up front and drum in the rear. the brake pedal is so hard to push and will stop the car but not very fast. It does have prop valve on it. maybe wrong master cyl? This is driven by a woman more than me so would like to fix any thoughts.

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Old 07-08-2011, 01:18 AM
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does it have a brake booster on it? if so is it a little one or a big 11 incher? tiny boosters make for hard pedals big boosters make for softer pedals
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Old 07-08-2011, 01:54 PM
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no booster rod to long ?
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Old 07-08-2011, 05:47 PM
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What is the bore of the master cylinder?

If you have pressure on the brake pedal when you start the car, does the pedal move toward the floor?

Andy
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Old 07-08-2011, 07:23 PM
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Any chance that somebody has added something other that brake fluid to the master cylinder ?
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Old 07-09-2011, 12:55 AM
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the answer is simple lol you said it does not have a booster that means you have manual brakes no vacum assist. if you want to keep the manual brakes you can change the master cylinder to have a larger bore size which will make for a softer pedal, make life simple add a vacum booster pedal will soften car will stop better
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Old 07-09-2011, 05:59 AM
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Quote:
Originally Posted by UPandComing
the answer is simple lol you said it does not have a booster that means you have manual brakes no vacum assist. if you want to keep the manual brakes you can change the master cylinder to have a larger bore size which will make for a softer pedal, make life simple add a vacum booster pedal will soften car will stop better
That would be my thinking, did Ford offer the 68 tang with manual or power brakes as a customer choice ? 68 sounds a little late to have manual brakes, I was in Nam at the time living the good life, playing paintball with real bullets, so I am not sure.
If not any idea when power brakes became the standard of the industry? That might be a trivia question.
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Old 07-09-2011, 08:52 AM
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Quote:
Originally Posted by UPandComing
the answer is simple lol you said it does not have a booster that means you have manual brakes no vacum assist. if you want to keep the manual brakes you can change the master cylinder to have a larger bore size which will make for a softer pedal, make life simple add a vacum booster pedal will soften car will stop better
A larger bore master cylinder will make for a harder pedal. If the pedal is too hard you need to go to a smaller bore on the master cylinder.

Andy
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Old 07-09-2011, 03:50 PM
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ooops ur right sorry got that one backwards
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