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    1. #1
      Join Date
      Nov 2008
      Posts
      42

      Inboard area of a master cylinder.

      Im reading a brake systems book and have gotten into the hydraulic gain section. Although I can figure out the gain ratios with the data thats in the book there is one part they leave n/a on the master cylinder. Heres an example of what it gives



      Master Cyl dia/0.75in inboard area/n/a in sq. effective area/0.44in sq.
      Caliper dia 2.00in inboard area/3.14in sq. effective area/6.28in sq.

      Now from that data the n/a number is right around .585 but where did they get .585 from?
      Quote Originally Posted by Damn True View Post
      Occupant comfort and the eardrums of the neighbors kids are secondary concerns.


    2. #2
      Join Date
      Apr 2001
      Location
      Central CA USA
      Posts
      6,114
      Country Flag: United States
      a 3/4" bore has a surface area of .4418" square inches, that's all you need to use.
      Any mention of inboard area on a master cyl is an error, - there is no .585

      When comparing single-piston calipers to multi-piston calipers, use the sq in bore area for a single piston type caliper, or on a 4 piston caliper use only one side of the caliper. If multiple caliper bore diameters are used, calculate the total bore area in sq in for one caliper half.
      David
      Last edited by David Pozzi; 01-07-2009 at 08:15 PM.
      67 Camaro RS that will be faster than anything Mary owns.

    3. #3
      Join Date
      Nov 2008
      Posts
      42
      Awesome! Thank you sir!

      How do you get the .4418" of the 0.75" cylinder? What is the formula for figuring that out?
      Quote Originally Posted by Damn True View Post
      Occupant comfort and the eardrums of the neighbors kids are secondary concerns.

    4. #4
      Join Date
      Feb 2008
      Posts
      148
      Quote Originally Posted by Otto-813 View Post
      Awesome! Thank you sir!

      How do you get the .4418" of the 0.75" cylinder? What is the formula for figuring that out?
      pi*r^2

    5. #5
      Join Date
      Jan 2006
      Location
      Oregon
      Posts
      1,773
      Country Flag: United States
      Quote Originally Posted by greencactus3 View Post
      pi*r^2
      Where pi is a constant approximately equal to 3.14 and r is the radius.

      Tobin
      KORE3
      It's what I does.




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