steve m
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| posted on 30/10/13 at 06:23 PM |
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Which master cylinder to go for?
One of my winter mods was to go for a new master cylinder, as I do think mine is going down hill,..........
Current set up is standard ford rear brake drums and on the front are Princess 4 pot calipers, and NO servo, currently the brakes work, but do require
a hefty shove on the pedal to stop quickly
So, if my current master cylinder set up is 19.05mm bore, what is the better choice, larger bore or smaller bore ?
also, by changing the bore size, what would I expect to be the difference
regards
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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dave_424
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| posted on 30/10/13 at 07:11 PM |
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One thing I just read about is that drum brakes are supposed to have a residual pressure valve to keep a small amount of pressure in the system,
usually around 10%. Might be something to think about.
For more braking force with the same amount of pedal pressure you want to move to a smaller bore, but that will result in a slight increase in pedal
travel.
Dave
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britishtrident
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| posted on 30/10/13 at 07:32 PM |
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quote:
Originally posted by dave_424
One thing I just read about is that drum brakes are supposed to have a residual pressure valve to keep a small amount of pressure in the system,
usually around 10%. Might be something to think about.
For more braking force with the same amount of pedal pressure you want to move to a smaller bore, but that will result in a slight increase in pedal
travel.
Dave
Only some drum brakes mainly Teves ****
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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steve m
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| posted on 30/10/13 at 07:54 PM |
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By slight increase of brake pedal travel, what type of meauserment are we looking at ?
1"/2.5 cm is fine
2"/5cm, will be reaching the limit of my short little legs !!
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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gremlin1234
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| posted on 30/10/13 at 08:23 PM |
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if you go to a smaller master cylinder, the pedal travel will be further, but with less effort
you can also do this by moving the 'pick up' point on the pedal itself.
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rodgling
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| posted on 30/10/13 at 08:36 PM |
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Avoid Wilwood m/cs, they are poo.
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dave_424
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| posted on 30/10/13 at 08:44 PM |
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From a quick think of things, if you half the bore of the master cylinder, pedal travel would be multiplied by 4. But that doesn't seem right in
my head.
From what I can imagine, going for something smaller won't make the pedal travel to the extent that you run out of legs
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daviep
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| posted on 30/10/13 at 09:05 PM |
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THIS is what I am using. 17.6mm (11/16" is the smallest commonly available. Changing from 19mm to 17.6mm will
decrease pedal effort by 16%
Cheers
Davie
“A truly great library contains something in it to offend everyone.”
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steve m
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| posted on 31/10/13 at 07:25 AM |
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Thanks for the responses,
A smaller bore it will be !
I will probably stay with the mk2 escort cylinder, as everything is already configured for it
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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melly-g
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| posted on 31/10/13 at 07:58 AM |
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I put a mk1 Fiesta non servo one on mine to replace the Sierra one, It made so much difference it was unbelievable!
didn't notice the extra travel, just the fantastic feel I got instead of the solid pedal and pushing so hard it hurt my leg!
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