Quote:
Originally Posted by 40 Deluxe
If you go the dual master route, do you know the necessity of proper pedal travel? It has to be the same as the original application of the cylinder or you will have NO braking if one side fails! The pedal will go almost to the floor before activating the remaining brakes, so if the pedal travel is shorter than designed by the OEM, it's crash time!
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This is exactly true. If the available pedal travel in the custom application is not
at least as much as in the original brake cylinder application, in the event of a failure in one side of the cylinder you could easily find the pedal hitting the floor or firewall before any braking pressure can be generated.
Quote:
Originally Posted by ThosD
"If you go the dual master route, do you know the necessity of proper pedal travel?"
Just went through this exercise in the past year. The single reservoir MC that came with my hydraulic conversion kit had a cylinder with specified diameter of 1". When measured, the dia was 1 1/8". I hated that MC. The pedal travel was short and required excessive force to stop. After reading serval conflicting posts about MCs on various forums, I sought advice from an experienced mechanic. A smaller dia cylinder allows for more pedal travel and thus yields better brake modulation and less force required to fully apply brakes. Also installed a dual reservoir MC so the front brake circuit is separate from the rear brakes. The beauty of the dual system is that a complete drain of fluid from one circuit does not affect the performance of the second circuit. Do not fear hydraulic brakes and do install a dual reservoir MC.
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In the event of a failure in one part of a dual system, the pedal will typically have to be pushed
a long ways down before any breaking pressure is created in the other part of the system. If your custom application does not have enough pedal travel available to reach this point you will effectively have no braking pressure in either part of the system. A smaller cylinder diameter will increase the amount of pedal travel and increase the likelihood of this happening.
Dual systems are not near as fail-proof as most people assume.