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Brake headache!!!!
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<blockquote data-quote="patooyee" data-source="post: 221554" data-attributes="member: 483"><p>What exactly is your problem? Does your pedal travel all the way to the floor without much braking action or does it stop where it should just without much braking power? The solution depends on which of those is the problem.</p><p></p><p>If your pedal goes to the floor you either need a bigger MC or smaller calipers. The problem there is not enough fluid displacement.</p><p></p><p>If the pedal stops where it should but still no power you're displacing enough fluid but over too large an area. In that case you need a smaller MC.</p><p></p><p>Size of lines does not matter. Larger caliper piston dia. = more stopping power but requires more fluid to fill. Smaller caliper piston dia. = less stopping power but less fluid to fill.</p><p></p><p>A bigger MC will generate less pressure than a smaller MC with an equal amount of pedal force. Keep line pressure equal, a bigger caliper will have more "bite." (That is why the 1-ton had the big MC in the first place.) But you need big bore MC to fill that big caliper which reduces line pressure over a smaller MC using the same pedal. That is why the 1-ton also used HYDROBOOST to increase line pressure.</p><p></p><p>The GM 1-ton MC is 1-5/16 dia. The '82 'Vette is 1-1/8. That's a 3/16 difference. Pretty big. You've drastically reduced the displacement ability as compared to original setup that went with the 1-ton front calipers you are using. If you want to keep your calipers I would try the 1-ton MC but I bet you're going to need a pretty strong leg to keep that thing stopped on a steep hill because of the big bore and no hydroboost. If you want to keep your MC you might try changing to 3/4-ton or even 1/2-ton front calipers, the same you have in the rear but know that your overall clamping force potential will be less than with the 1-ton calipers. Few of us actually need that much caliper force though. Hence the reason Cole and Woodleee are probably using 3/4-ton.</p><p></p><p>J. J.</p></blockquote><p></p>
[QUOTE="patooyee, post: 221554, member: 483"] What exactly is your problem? Does your pedal travel all the way to the floor without much braking action or does it stop where it should just without much braking power? The solution depends on which of those is the problem. If your pedal goes to the floor you either need a bigger MC or smaller calipers. The problem there is not enough fluid displacement. If the pedal stops where it should but still no power you're displacing enough fluid but over too large an area. In that case you need a smaller MC. Size of lines does not matter. Larger caliper piston dia. = more stopping power but requires more fluid to fill. Smaller caliper piston dia. = less stopping power but less fluid to fill. A bigger MC will generate less pressure than a smaller MC with an equal amount of pedal force. Keep line pressure equal, a bigger caliper will have more "bite." (That is why the 1-ton had the big MC in the first place.) But you need big bore MC to fill that big caliper which reduces line pressure over a smaller MC using the same pedal. That is why the 1-ton also used HYDROBOOST to increase line pressure. The GM 1-ton MC is 1-5/16 dia. The '82 'Vette is 1-1/8. That's a 3/16 difference. Pretty big. You've drastically reduced the displacement ability as compared to original setup that went with the 1-ton front calipers you are using. If you want to keep your calipers I would try the 1-ton MC but I bet you're going to need a pretty strong leg to keep that thing stopped on a steep hill because of the big bore and no hydroboost. If you want to keep your MC you might try changing to 3/4-ton or even 1/2-ton front calipers, the same you have in the rear but know that your overall clamping force potential will be less than with the 1-ton calipers. Few of us actually need that much caliper force though. Hence the reason Cole and Woodleee are probably using 3/4-ton. J. J. [/QUOTE]
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