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Author: Subject: Brake Master Cylinder Sizes
mark.silcock

posted on 24/7/19 at 09:29 AM Reply With Quote
Brake Master Cylinder Sizes

Out of interest what size master cylinders are people running on their cars?

We have .625 front and .7 rear, brakes are m16 calipers front and drums on the rear. Pedal box has bias adjustment which is adjusted all the way forward. The car still feels like the rears are locking first.

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adithorp

posted on 24/7/19 at 09:37 AM Reply With Quote
Those are common sizes to run. Ideally you'd want the bias to be somewhere in the middle of its range. You could go smaller on the front or bigger on the rear or change you rear slave cylinders to a smaller bore.

Have you checked the bias bar isn't articulating so far as to lock out when you press the pedsl





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rusty nuts

posted on 24/7/19 at 10:10 AM Reply With Quote
Try shortening the effective length of the pushrod on the rear master cylinder. Recently changed both of mine and had similar problem which I didnít have before, think I screw the pushrod further into the Clovis until I had about 6 mm difference, fronts now locking up first
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mark.silcock

posted on 26/7/19 at 11:17 AM Reply With Quote
Thanks guys, got a few things to check there!

What smaller slave cylinders are available for Ford drums? Not exactly sure what they are at the moment but I imagine its an Escort rear end.

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mark.silcock

posted on 26/7/19 at 11:20 AM Reply With Quote
quote:
Originally posted by rusty nuts
Try shortening the effective length of the pushrod on the rear master cylinder. Recently changed both of mine and had similar problem which I didnít have before, think I screw the pushrod further into the Clovis until I had about 6 mm difference, fronts now locking up first


Was that on the front or rear pushrod you shortened?

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rusty nuts

posted on 26/7/19 at 12:59 PM Reply With Quote
I shortened the rear Cylinder pushrod

[Edited on 26/7/19 by rusty nuts]

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