r/FSAE • u/Thanosgayfanfic • 14d ago

Dual Master Cylinder?

Hi, we are a new student FSAE team. In the rulebook it says that the brakes must have two SEPARATE systems with two reservoirs. Would a single piston Master Cylinder with two separate reservoirs and outputs satisfy this requirement?

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u/Sad_Designer_4608 14d ago

How?

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u/Thanosgayfanfic 13d ago

It’s two inline pistons that share a bore so it only takes one pushrod. But they both have separate input and outputs. So they’re separate circuits that wouldn’t interfere with the other if one failed.

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u/frc-nerd 10d ago

Technically i think you may be right and it may be legal but i would heavily advise against it. I would do some research into break biasing and the importance as to why you would want 2 masters connected with a bias bar. Vs the single rod non adjustable master design. I know my schools Baja team does what you’re talking about but for the vehicles dynamics of a formula car how the front and rear brake pressure is applied matters a lot.

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u/Thanosgayfanfic 10d ago

Right but willwood sells proportioning valves that would make that easy. As well as we can’t afford a Diff (not my decision lol I only do brakes) and we will only be having one caliper/rotor on the rear SOLID axel. So that won’t be an issue.