master cylinder upgrade ?

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master cylinder upgrade ?

06-04-2009, 07:24 AM

Post: #24

Ivan141 Offline

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13/16 to 15/16" amounts to a 33% increase in capacity.
Effective pressure from the master cylinder is force divided by piston area.
So you need 33% more force to get the same pressure you did before.
Force exerted on the caliper is this pressure multiplied with the surface area of one side of the caliper. Multiply that by 2 to get the effective clamping force for any caliper type.

Anyways.. enough theory. The stock rx7 master cylinder is 15/16, so besides the fact that you might need more pedaleffort to achieve the same pressure, the size is not as far off target as I thought earlier.
Maybe bigger brake systems compensate for this by using stronger booster assistance?

FABRICA MI DIEM, PVNC!

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Messages In This Thread

master cylinder upgrade ? - filh - 03-26-2009, 02:10 PM

[] - Ivan141 - 03-26-2009, 06:15 PM

[] - filh - 03-27-2009, 12:11 AM

[] - filh - 03-30-2009, 01:03 AM

[] - jondee86 - 03-30-2009, 10:14 AM

[] - S.K. - 03-30-2009, 11:39 AM

[] - Ivan141 - 03-30-2009, 12:08 PM

[] - filh - 03-30-2009, 01:57 PM

[] - mc68 - 03-30-2009, 02:03 PM

[] - Ivan141 - 03-30-2009, 09:03 PM

[] - filh - 03-30-2009, 10:43 PM

[] - Ivan141 - 03-31-2009, 10:35 PM

[] - apardal - 03-31-2009, 11:06 PM

[] - Chixican - 03-31-2009, 11:30 PM

[] - filh - 04-01-2009, 11:21 PM

[] - dr.occa - 04-02-2009, 03:07 PM

[] - apardal - 05-08-2009, 04:47 PM

[] - filh - 05-30-2009, 12:41 AM

[] - GWtaylor - 05-30-2009, 12:52 AM

[] - Ivan141 - 05-30-2009, 11:26 AM

[] - filh - 06-02-2009, 11:45 PM

[] - Ivan141 - 06-03-2009, 12:25 AM

[] - filh - 06-03-2009, 11:47 PM

[] - Ivan141 - 06-04-2009 07:24 AM

[] - filh - 06-04-2009, 10:55 PM

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