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## Re: [Mgs] MGB rear brakes

 To: Max Heim Re: [Mgs] MGB rear brakes Simon Matthews Tue, 24 Feb 2009 10:11:08 -0800
 ```Max, It's not quite so simple. This description of dual master cylinders describes a balance bar used to ensure equal force is applied to each cylinder: http://www.hotrodheaven.com/tech/brakes/brakes3.htm In this scenario, the balance bar would act to equalise the pressures between front and rear. Also, are not some brake systems split diagonally? This patent describes a tandem dual-master cylinder setup in which the two circuits also have equal pressure: http://www.tpub.com/content/construction/14273/css/14273_248.htm Regards, Simon On Tue, Feb 24, 2009 at 9:31 AM, Max Heim wrote: > But in a dual master cylinder system, it is possible to meet resistance in > one circuit before reaching that point in the other circuit (for example, in > the case of a failed hose in one circuit). The pressure does NOT equalize > between the completely independent circuits. So my argument is that by using > larger wheel cylinders in the rear brake circuit, you are delaying the onset > of braking force in the rear circuit, by requiring more fluid to be moved in > order to reach the point of applying braking force RELATIVE TO THE FRONT > CIRCUIT. Now do you see what I mean? > > I think we have established that single and dual master cylinder systems > behave very differently in this respect, so that one needs to be careful in > defining the question. > > -- > > Max Heim > '66 MGB GHN3L76149 > If you're near Mountain View, CA, > it's the primer red one with chrome wires > > > > on 2/24/09 9:07 AM, Simon Matthews at simon.d.matthews@gmail.com wrote: > >> Charles, >> >> When you brake, do you push your foot down a certain distance? Or do >> you push down until you get the appropriate resistance from the pedal? >> >> Yes, it takes more fluid, but this is irrelevant. The driver just >> pushes the pedal further in order to get the same resistance. The >> fluid will move in the system to keep the pressure uniform >> throughout. >> >> Simon >> >> On Tue, Feb 24, 2009 at 6:23 AM, Charles & Peggy Robinson >> wrote: >>> OK Simon but he's right about the movement being less in a larger cylinder, >>> with the same amount of fluid displaced by the master. >>> >>> CR >>> >>> >>> Simon Matthews wrote: >>>> >>>> It's not about the amount of fluid, it's about the force applied. With >>>> a larger diameter slave cylinder, the same pressure is applied to a >>>> larger area, resulting in a greater force. Hence greater braking >>>> effort. >>>> >>> >>>> Simon > _______________________________________________ > Support Team.Net http://www.team.net/donate.html > > > You are subscribed as simon.d.matthews@gmail.com > > > Mgs@autox.team.net > http://autox.team.net/mailman/listinfo/mgs > > http://www.team.net/archive _______________________________________________ Support Team.Net http://www.team.net/donate.html Mgs@autox.team.net http://autox.team.net/mailman/listinfo/mgs http://www.team.net/archive ```
 Current Thread Re: [Mgs] MGB rear brakes, (continued) Re: [Mgs] MGB rear brakes, Max Heim Re: [Mgs] MGB rear brakes, melfrankus Re: [Mgs] MGB rear brakes, Simon Matthews Re: [Mgs] MGB rear brakes, Paul Hunt Re: [Mgs] MGB rear brakes, Charles & Peggy Robinson Re: [Mgs] MGB rear brakes, Larry Daniels Re: [Mgs] MGB rear brakes, Paul Hunt Re: [Mgs] MGB rear brakes, Simon Matthews Re: [Mgs] MGB rear brakes, Max Heim Re: [Mgs] MGB rear brakes, Bert P Re: [Mgs] MGB rear brakes, Simon Matthews <= Re: [Mgs] MGB rear brakes, Max Heim Re: [Mgs] MGB rear brakes, Richard Ewald Re: [Mgs] MGB rear brakes, Simon Matthews Re: [Mgs] MGB rear brakes, Max Heim Re: [Mgs] MGB rear brakes, Paul Hunt Re: [Mgs] MGB rear brakes, Charles & Peggy Robinson Re: [Mgs] MGB rear brakes, Barney Gaylord Re: [Mgs] MGB rear brakes, Paul Hunt Re: [Mgs] MGB rear brakes, Charles & Peggy Robinson Re: [Mgs] MGB rear brakes, Charles & Peggy Robinson