Posted by Charlie (131.204.13.106) on April 12, 2001 at 18:54:02:
In Reply to: brake systems are very misunderstood... posted by rickyracer on April 12, 2001 at 15:12:21:
The compressed air was just an example of pressure. The pressure is equal on both sides of the split, and that pressure is equal to the pressure before the split. When doing brake calculations (to calculate proper master cylinder or caliper piston size), equal pressure is assumed at all places on the braking system, regardless of distance of placement of splitters.
Like you said, what makes the difference is surface area of the wheel cylinders. The only variables are the force on the pedal, pedal travel, master cylinder piston area and wheel cylinder/caliper piston area.
: air you Compress, fluid you can only pressurize. Makes a big difference it how a system works. When split it allows for another route of fluid flow, which will go to the weaker side.
: With only one hose in the rear and two in front, there is a difference in the expansion of the system, even from side to side.
: And what makes a drum system work as it does, even using a "Juntion Block" is that the rear wheel cylinders are smaller diameter which exerts less pressure between the smaller shoes and drums.
: When a fluid line splints, it splints volume which has a effect on the flow. There is allot of difference in "static" & "dynamic" head pressures also.
: : You are misunderstanding them. Front brakes are closer but that doesn't make them receive fluid any faster, fluid does not compress and line expansion is minimal. When a rear brake line splits it does NOT split pressure, pressure does not work that way at all, if you split an air compressor line 10 times you'll still have roughly the same pressure. I felt like I should correct you since you seem to be telling everyone 'the way it is' and acting like its a college class. You are right in some points but not in those. Stick to what you know. I have designed brake systems from the ground up, I know how this stuff works but I really haven't looked at the Mav brake system close enough to know what parts are where so I didn't enter everyone's flame discussion until now. -CP