Reply to "Which engage first, front or rear brakes?"

jfb05177Member

my view on calipers. . .

I don't have the diameters (more so, I just don't feel like researching)

just assuming some things based upon the front calipers are 4 piston and the rear is a single.

while the master cylinder is pushing fluid to to both front and rear at the same time. brake fluid pressure will not build up until the pads are just touching the rotor. I'll assume the single rear piston has less volume change to go from "seal retracted" to contacting the rotor.

SO in absolute, the rear brakes are "applied" first then. (but very very little stopping). the rear touching will let rear pressure circuit devolping a minute pressure to cause the MC pressure to put more volume to the front untill they just touch.

Now both front and rear fluid circuits will build up pressure equally as pedel is pressed.

the amount of stopping force generated by the same pressure now will be greater in the front due to the greater caliper piston area

Just my SWAG!

8/24/2011:24 AM

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