Brake Tester: "Stethoscope" For Car Performance Tuning

Dear car enthusiasts, today we are going to talk about the "black technology" hidden in auto repair shops and inspection stations - brake tester. This thing is like a stethoscope for a physical examination of the car, which can help us find out the "health status" of the brake system. In the performance tuning business, it is an indispensable helper.

Working principle of brake tester

There are two main types of brake testers: roller type and road test type. The roller type is like installing a "treadmill" on the car, letting the tires rotate on the roller to measure the braking force; the road test type is to run directly on the road and record the actual braking data.

The roller tester will measure two key indicators:

Active horizontal braking force (the pressure of the tire on the roller when braking)

Passive horizontal braking force (the resistance of the roller when rotating) This data can help technicians determine whether the brake system is working properly, whether there are problems such as biased braking and insufficient braking force.

Magical use in performance tuning

Brake balance debugging: By comparing the braking force ratio of the front and rear axles, the brake caliper force distribution can be adjusted to make the body more stable during emergency braking.

Modification verification: After replacing a large brake disc or high-performance brake pad, you can use a tester to verify the modification effect to see if the braking distance has been shortened.

Troubleshooting: When the brake light on the dashboard alarms, the tester can quickly locate which wheel has a problem with the brake.

ABS adjustment: With professional software, you can collect the braking force changes of each wheel when the ABS is working and optimize the anti-lock logic.

Tips in practical application

Experienced drivers know that there are tricks to using the tester:

Let the tire temperature rise before testing, cold tire data is inaccurate

Roller test is more accurate for small cars, and road test is best for large cars

During the test, simulate different vehicle speeds, from 30km/h to 100km/h segmented test

Pay attention to the difference in data when empty and fully loaded

Future development trend

Now some high-end testers have begun to use wire control technology, which can simulate the braking performance under various extreme road conditions. I believe that in the near future, we can directly see the real-time braking performance curve on the mobile phone, which is more convenient to adjust.

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