Why do race cars — such as Formula 1 cars — use two brake master cylinders?

Engineering Asked by ITChap on August 3, 2020

In Derek Seward’s Race Car Design and in some of the videos on race car braking systems, such as this one, it is mentioned the use of two master cylinders, one for the front brakes and one for the back.
The bias between front and back being set using different lever length between the pedal and each master cylinder.

Why is this configuration preferred over a single master cylinder of same surface area and a bias valve? Is it safety requirement to keep both front and back hydraulic systems entirely separated or is there any technical benefit?

One Answer

Two cylinders are often needed due to the fluid input needed by the multi-pot calipers used front and rear.

The control of balance is also handy.

Answered by Solar Mike on August 3, 2020

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