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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,234
On a single master cylinder car like most street cars have the brake bias valve is an adjustable pressure regulator in the hydraulic line going to the rear calipers.

You don't reduce the pressure going to the front calipers.. you control that with your foot with pedal pressure.

With the brake bias in the rear hydraulic line you can adjust how much hydraulic pressure is going to the rears in relation to whats going to the fronts so they don't lock up before the fronts during hard braking in a straight line and while turning in and trail braking into corners.

If you reduce the pressure going to the rears to give maximum braking distances in a straight line and during turn in and trail braking going into corners in the dry it's going to be too much in the wet and the rears will lock up and you'll spin off the road.
Then you can turn the brake bias knob to reduce hydraulic pressure going to the rear calipers so they don't lock up during weight transfer to the front wheels while braking hard.
Old 04-18-2014, 06:29 AM
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