Proportional Valves

[Gerard87]

Hey, I'm currently building a single seater racer as a college project. We're using a 600cc motorbike engine and it weighs approx 300kgs. I am currently designing the Braking System of the car. I am restricted in using a single caliper mounted to the differential at the rear.

I am unsure of the benefits of using a proportional valve in the rear circuit and
is it necessary to use one.
Any information or help would be great fully appreciated.

Thanks, Gerard.