Why modify the brakes?

One: What is a good brake?

        There is only one best braking condition: braking force = tire friction limit. In this perfect state, even if the original car is equipped with an ABS system, ABS will not start at the same time when the brakes are applied to the bottom. The tires always remain on the edge of the critical point of locking and non-locking, and remain at the limit of tire friction at all times. The entire braking process is completed in the edge state. This is the most perfect top brake effect.

In reality, the braking force depends on the following: the manpower the driver applies to the brake pedal, the lever action of the brake pedal itself, the thrust that the pedal can push the master cylinder, and the brake vacuum assist pump can produce The auxiliary force, the force transmission characteristics of the brake oil circuit itself, the force transfer characteristics of the caliper itself, and the friction characteristics of the brake pad and the brake disc. The tire's frictional limit depends mainly on the tire's own friction characteristics and the friction characteristics of the road surface.

Second: The weakness of the original brake

        The biggest weakness of the original brake system is that the excessive force between the initial state and the limit of braking force is extremely short. This is called “very non-linear” in terms of the voice that usually describes power. As the saying goes, trampling the brakes is not enough and the brakes are too heavy.

        Most of the original brakes, after you put a lot of effort into pressing the brake pedal to the end, the braking force generated by the brake system itself often far exceeds the friction limit of the tire, so the original brake can easily let the ABS system Intervention work: After kicking the brakes in the end, you will always hear various sounds of the ABS master cylinder, and the brake pedal constantly feedbacks the force of the rebound. The ABS system constantly “brake-release-brake-release” the brake calipers of each tire. Repeated actions.

Three: The purpose of refitting the brake

        The purpose of a good modified car is actually only one: to allow drivers to easily maintain the perfect braking state continuously.

        A set of excellent refit brake systems (including brake calipers, brake pads, brake discs, brake steel hoses, brake oils...), maybe at the output of extreme power, and cannot go beyond the original brake calipers. However, refitting the brakes often allows the rider to continuously step on the most perfect brake state for a relaxed foot feeling.

The same vehicle is doing the 100km/h-0 deceleration test. After the original brake, the ABS system immediately after the heavy brake, you hear the ABS master pump squeaking and it takes 40 meters to finish slow down. Then, you repeat this process continuously. After 5 times, you will find that your braking distance has become 45 meters or even 50 meters.

With the appropriate refitted brakes, after a heavy brake, the ABS system stays silent, does not start work at all, and the tires are not locked, but you can clearly hear the tire ringing at the edge of the locked and non-locked limit. Fetal sounds, and a clear sense of braking at the feet, you spent 38 meters to complete a deceleration, then you repeat this process, after 5 or even 10 times, you will find that your braking distance is still 38 meters.

Fourth, the characteristics of modified brakes

Excellent refitted brakes can often be decompressed for the main brake pump, so you don't need to replace the brake master pump to match your modified brake kit. If someone tells you that you need to replace a larger master cylinder with the brake kit that he has configured for you, you can only say that the collocation he gave you is completely wrong and is purely pit father.

Excellent modification of the brakes, but also for the driver "decompression", stepped on a perfect braking state, the manpower you need to apply to the brake pedal, should be far less than the power you step on the original brake to the limit. A good set of brakes does not require you to step on it every time you run away at the limit, but you should be able to easily control the linear output of the brake system with only its own instinctive response. , step on, moderate moderate effect, heavy step, perfect braking state. A good brake modification can often achieve the same linear performance of the brake pedal stroke and force as the acceleration of the accelerator pedal. This is also the essential difference between the original single-sided single-piston large caliper and the lightweight multi-piston caliper used for conversion!

Fifth, the difference between competitive multi-piston calipers and street version multi-piston calipers

High-grade cars often omit the ABS system, and there is no brake vacuum booster pump. The control of the brake caliper depends on the rider's foot and foot. Therefore, the brake calipers of higher-level racing cars are often easier to push to the limit. The caliper itself will be made of monolithic aluminum alloy forged. The design of the internal oil circuit also has a considerable effect. The caliper piston is made of titanium alloy, and it is sensitive to light weight. Therefore, drivers without the vacuum booster do not need to pay full attention and strength each time to get on the brake pedal. They can also run for hours on the track and easily make perfect ones. Braking status.

The street version of the multi-piston conversion caliper is cheaper to produce, and the materials and processes are far inferior to the competitive version. The street car itself is equipped with a vacuum booster pump, and the friction of the street car tires is far inferior to that of the racing tires. Therefore, many brave workers cut down on materials. It also allows street bike drivers to find better braking and foot feel on the road than the original brakes.