But in a dual master cylinder system, it is possible to meet resistance in
one circuit before reaching that point in the other circuit (for example, in
the case of a failed hose in one circuit). The pressure does NOT equalize
between the completely independent circuits. So my argument is that by using
larger wheel cylinders in the rear brake circuit, you are delaying the onset
of braking force in the rear circuit, by requiring more fluid to be moved in
order to reach the point of applying braking force RELATIVE TO THE FRONT
CIRCUIT. Now do you see what I mean?
I think we have established that single and dual master cylinder systems
behave very differently in this respect, so that one needs to be careful in
defining the question.
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 2/24/09 9:07 AM, Simon Matthews at simon.d.matthews@gmail.com wrote:
> Charles,
>
> When you brake, do you push your foot down a certain distance? Or do
> you push down until you get the appropriate resistance from the pedal?
>
> Yes, it takes more fluid, but this is irrelevant. The driver just
> pushes the pedal further in order to get the same resistance. The
> fluid will move in the system to keep the pressure uniform
> throughout.
>
> Simon
>
> On Tue, Feb 24, 2009 at 6:23 AM, Charles & Peggy Robinson
> <ccrobins@ktc.com> wrote:
>> OK Simon but he's right about the movement being less in a larger cylinder,
>> with the same amount of fluid displaced by the master.
>>
>> CR
>>
>>
>> Simon Matthews wrote:
>>>
>>> It's not about the amount of fluid, it's about the force applied. With
>>> a larger diameter slave cylinder, the same pressure is applied to a
>>> larger area, resulting in a greater force. Hence greater braking
>>> effort.
>>>
>>
>>> Simon
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