Posted by Tim
on 4/27/2009, 7:24 am, in reply to "proportioning valve"
64.12.116.18
--Previous Message--
: Tim these cars don't have a proportioning
: valve. The front to rear balance is
: determined by the master cylinder bore
: sizes, all else being equal. The
: primary & secondary systems are
: completely independent of each other,
: the primary works the front calipers,
: the secondary the rear cylinders. If
: any bore size is changed (m/cyl,
: caliper, wheel cylinder), it will
: increase or decrease the effectiveness
: of that half of the system, which will
: then affect the front/rear balance. (An
: example would be an increase in bore
: diameter (master) will result in less
: pedal travel (more fluid displaced for
: a given amount of pedal travel), and
: less effectiveness (due to the ratio
: change). Also a slight change made
: usually won't be evident until the
: brakes are working close to the limit
: of tire adhesion.
: HTH
: Glen
:
: --Previous Message--
:
:
: --Previous Message--
: ... not a stupid question.
: IIRC the bore diameters are different,
: and the later cylinder is metric.
: You could possibly make it work, but
: the proportioning would be changed;
: there was also a rear wheel cylinder
: diameter change at the same time.
: HTH
: Glen
:
:
: --Previous Message--
: OK, Is this a stupid question? Why
: can't
: you use a 1976 to 1980 brake master
: cylinder instead of the expensive 1970
: to 1975 model? What is the difference?
: I don't understand.
:
:
:
: Glen, how would this effect the car? As
: long as it goes to the proportioning
: valve, what would be the difference? I
: don't understand? Thanks, in advance
:
:
:
Glen, Thanks for that info. I thought that there was a proportioning valve that the mater pipes too, with the wire connected to it. Not a brake guy, so just learning. I can rebuild brakes, but just don't much about the Master cylinder and stuff. So, when the brakes are applied it starts pushing fluid down both pipes, but as they are applied harder, it looks like the front get more? Is that what I see?
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