First, regarding compliance and legal issues, as far as the brake master cylinder is concerned, as long as the vehicle is safe to drive and the braking force can be increased, these upgrades and modifications are legal.
Second, understand the needs. Why upgrade and upgrade the brake master cylinder? The reason is very simple, because we want to improve the braking performance of the brakes. A very important component of the entire brake braking system is the brake master cylinder. The brake caliper cylinder, oil pipe steel throat, brake pads, brake discs and other components are upgraded. After that, then naturally came to the master cylinder. Any modification and upgrade should be done step by step, not overnight. After upgrading so many brake system components, if you still feel that the brake braking force is insufficient, or the foot feel is not good, then one factor that may be considered is the total amount of brake braking. Whether the pump's pressure support for brake fluid is insufficient, resulting in a problem of poor braking force and foot feel. Therefore, most of the cases where the brake master cylinder is modified are found in some off-road racing cars, and the cases that appear on our civilian cars are really rare.
Third, the working principle and function of the brake master cylinder. The brake master cylinder is the main matching part of the hydraulic brake. There is a tank for storing brake oil on the top, and a piston in the cylinder below. The piston is affected by the brake pedal in the cylinder and then through the push rod to transmit the brake oil pressure in the cylinder to the wheel cylinders to achieve the braking effect. Therefore, here, we need to pay attention to whether the brake master cylinder is sufficient for the generation of brake oil pressure. The pressure directly determines the pressure for each caliper cylinder, that is, whether the brake thrust is sufficient.
First of all, the brakes are soft. When the brakes are depressed, if the texture of the brakes is obviously soft and the stability of the brakes is reduced, it may be caused by insufficient pressure effect of the master cylinder. . Of course, it is also possible that the pistons of the master cylinder and the sub-cylinder are not well sealed, or the brake pipe is broken somewhere, causing oil leakage. If there is no oil leakage, then the master cylinder pressure is not enough.
Secondly, the brake pedal does not return or returns slowly: If the pedal is neither raised nor resistance after the brake pedal is depressed, it is said that the brake does not return. At this time, you need to check whether the parts of the master cylinder and the sub-pump are damaged. Secondly, this phenomenon occurs, and there may also be a lack of brake fluid or oil leakage.
In addition, the occasional braking force of the brake suddenly drops, and the braking force is instantly lost. The problem that causes this phenomenon is most likely caused by the brake master cylinder striking and damaging.
Then there is the small horse-drawn cart. It is those small cars, mini cars, the brake master cylinder configured by the factory is very small, because the working condition does not require such a large oil pressure master cylinder, so in some extreme car owners, these small cars, mini cars have been replaced The apparent lack of braking force after the big six piston.