Don't Make This Common Brake Bias 'Tuning' Mistake!

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Many new to the brake game make this mistake, trying to compensate for an incompatible brake setup via bias adjustment. On the surface it makes complete sense, but once you dig down a little, it becomes obvious why it just won't ever work compared to the correct setup and brake cylinder size.

As Daryl Perusic of ‪@PERACING‬ explains in this [TECH TALK], pedal boxes are a common and GREAT upgrade for a race car, but there are some common pitfalls when it comes to sizing a master cylinder and 'tuning' out any issues with an imperfect setup simply by adjusting the bias.

Many of the cars used at events like the ‪@WorldTimeAttackChallenge‬ use setups like this which offer some features your OEM setup can't such as the ability to adjust the position and bite points of each pedal to suit a specific drivers size and preference are obvious and beneficial, but this is not the main advantage.

Unlike the production car setup, a pedal box in a race car such as this one from PE Racing controls not one single master cylinder, but instead with one dedicated for the front and one for the rear giving the freedom for independent adjustment. Coarse adjustments can be made during car setup, but finer adjustments on the fly by the driver are also possible. This gives the driver the ability to compensate for shifting weight balance as fuel is burned, or to adjust the bias according to track and tyre conditions such as rain.

When it is all said and done though, you need to ensure the brake cylinder size is correct for the brake system as it is not a case of just fitting the biggest you can on there for 'best performance' and calling it done if you want to have things work as intended, which with brakes is always nice right 😅

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TIME STAMPS:
0:00 - Common Mod, Common Mistake
0:12 - Daryl Perusic | PE Racing
0:16 - Master Cylinder Sizing & Brake Bias
0:58 - Bias Bar
1:40 - What Is Bias Migration?
2:15 - Brake Pressure Inconsistency
2:27 - How To Size Your Master Cylinder
3:27 - Rotor and Calliper Sizing
4:11 - Rear Over Braking
4:19 - Getting Center of Gravity Height
5:41 - Attention To The Details Matters
7:08 - Will ABS Fix Any Bias Setup Failings?
8:07 - ABS Doesn't Give You Maximum Braking Ability
9:00 - Don't Fall Into This Trap Team!
9:38 - Like, Sub, All That Good Stuff
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