Which brake master cylinder?
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  1. #1
    Official RnS Addict Stroprock's Avatar
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    Which brake master cylinder?

    I am now thinking about what i should do with brakes on the Austin. I have Triumph Spitfire front brakes and Reliant Kitten rear brakes, so that means front calipers and rear drums. Because of this, does that mean I can't use the master cylinder from the Kitten, and I must look elsewere for a suitable cylinder?

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    Off the Xmas card list kapri's Avatar
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    If you haven't messed with the pedal ratio a 3/4" bore ( aboiut 19mm) should do that OK . Would be better feeling with a servo as well though but would stop on a 3/4 alone.

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    Thanks. Surely different 3/4" cylinders have different strokes?

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    Stroke is controlled by pedal ratio which gives the feel. The amount of fluid moved by the m/c vs the amount of fluid requirement of your wheels cylinders/ discs = amount pedal moves.

    Fluid is displaced equally ( Pascals Law) .

    Pressure produced at pedal (pi x r2 x h x pedal input ( generally accepted as max of 100lbs) x pedal ratio) is spread evenly throughout the system and applied to surface area of 'receiving cylinders . From there it gets far more complicated with available brake material area vs coefficient of friction of material.

    Couple of basic articles belowI wrote ages ago to give a bit of insight.

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