prawnabie
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| posted on 14/6/10 at 07:01 PM |
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Brake master cylinder sizes...
I am ditching my 22mm cylinder for a early fiesta one to try and get a better pedal feel. I have M16 calipers up front and Mk2 17 mm cylinders on the
back.
Will I be better off going with a 19 or a 17.8 mm master cylinder.
Ta
Shaun
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whitestu
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| posted on 14/6/10 at 08:33 PM |
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I went from 22mm to 19 and it makes quite a difference, both in less effort and more pedal travel.
I reckon I would have more pedal travel than I would like if I went to 17mm.
Stu
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RazMan
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| posted on 14/6/10 at 11:02 PM |
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Changing from 22mm down to 19mm is quite a drop and will make your pedal 'longer' but should give you more braking for the same pedal
pressure. Is that the effect you are looking for?
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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prawnabie
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| posted on 15/6/10 at 01:40 PM |
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BT has stated in numerous posts that 22mm is too big for non servo applications. There was also a post a few days ago with people saying they had
changed from 22 to 19 and the pedal feel was much better.
I was wondering wether going down to 17.9 would be even better or is 19mm the best to stick to.
Cheers
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smart51
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| posted on 15/6/10 at 01:45 PM |
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19mm will need 75% of the pedal effort at the expense of 34% more travel.
17.8mm will need 65% of the pedal effort at the expense of 53% more pedal travel.
To put it another way, if you have to press with 50kg of force to lock up now, that will change to 37.5kg or 32.5kg. If you have to push 40mm now,
that will become 54 or 61mm. Take your pick.
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daviep
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| posted on 15/6/10 at 03:26 PM |
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I use an 11/16" (17.5mm) MC and have never noticed there being excessive travel in the brake pedal, the brakes have plenty feel.
Davie
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RazMan
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| posted on 15/6/10 at 04:56 PM |
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It really comes down to the pedal ratio so do your sums first regarding pedal travel - just be careful that your brake pedal doesn't hit the
floor under 'oh my god' pressure or you will regret the change .... big time! 
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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