Posted by Glen
on 4/26/2009, 10:41 am, in reply to "Re: No..."
98.77.55.69
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
:
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