Stay away from the misunderstanding and several misunderstandings of automobile brake modification

Misunderstanding of brake modification-blindly replacing brake discs and brake calipers: Now almost all models are equipped with ABS brake anti-lock devices. During full braking, the brake pads will clamp the brake disc for braking, and the wheels will be close to the locked state after heavy braking. At the moment of locking, ABS will start when the sensor detects that the wheel is close to locking. It will automatically release the brake in an instant and release the wheel from the locked state, because the wheel will lose track when it is locked. After ABS releases the brakes and regains the tracking performance, the brakes will approach the locked state again, and then operate back and forth until the car stops. The process of ABS working is struggling on the edge of locking, that is, from the static friction state between tire and ground to the sliding dynamic friction state. What really stops the car is the friction between the tire and the ground, which limits the clamping force of the caliper. When ABS starts depends entirely on when the tires lose grip, not what brake discs and calipers you have changed. If ABS starts soon when the car is fully braked, it means that the caliper strength far exceeds the tire grip. The first consideration is to change the specifications of the tire. Choose a tire with better performance. Tire performance determines how much caliper clamping force is transmitted to the road surface. If the braking performance of the car is not good, the reason may be poor tire grip. You can choose sports tires to upgrade existing tires. Appropriately widening the tire width is also an effective way to increase friction. On the basis of tire upgrade, brake discs and calipers can also be upgraded, which greatly improves the braking performance. Simply upgrading the brake discs and calipers will not achieve the expected results. It is the most scientific to consider the upgrade of brake discs and calipers only after the grade and width of tires are upgraded. The misunderstanding of brake modification-unreasonable collocation of front and rear calipers: When braking, the manufacturer has accurately calculated the ratio of front and rear brakes. This distribution ratio is related to the front-to-rear weight ratio of the car and the height of the center of gravity of the car. The best way is to upgrade the original brake disc and caliper in proportion. Firstly, the distribution ratio parameters of the front and rear brakes of the original car are known, and then the front and rear discs and calipers are selected on this basis. Only in this way can the braking performance be maximized, otherwise it can only get half the result with half the effort. From this point of view, I believe that it is difficult or rare for most refit shops on the market to settle this account. If you want to change the scheme of other cars, it will not match the overall design of the original car body. Misunderstanding of brake modification-the brake system does not match the whole vehicle: after obtaining stronger braking performance, we will find that the suspension system of the original vehicle can no longer withstand such a strong braking force, the dynamic stability of the vehicle becomes worse, the nodding phenomenon becomes more serious, and the dynamics of the rear of the vehicle may become restless. At this time, it is necessary to change a set of shock absorbers with better support performance. Excellent suspension system adjustment can also improve the performance of the system, which is why modification is a systematic project and affects the overall situation. Finally, it is also the most easily overlooked point by many car owners when modifying. Many car owners who refit the 6-piston master cylinder or even the 8-piston master cylinder feel that their feet feel worse and the brake pedal stroke becomes longer after refitting, which is the result of the mismatch between the master cylinder and the master cylinder. If only the master cylinder of each wheel is enlarged, then the enlarged master cylinder will drive more and more pistons to drive the brake pads, and more brake oil needs to be supplied per unit time. But we will not replace the master cylinder, and the oil supply of the master cylinder is designed according to the original master cylinder. That is to say, the braking force is reduced, the pedal stroke is naturally longer, and the foot feel is worse, which makes the modified brake master cylinder unable to play its due performance. When refitting the master cylinder, the supply capacity of the master cylinder must be considered, and the master cylinder with smaller oil supply should be replaced together. Electric state I remind that the best way to modify is to upgrade the brake discs and calipers of the original car in proportion. Understand the distribution ratio parameters of the front and rear brakes of the original car, and select the front and rear discs and calipers on this basis. Only in this way can the braking performance be maximized, otherwise it can only get half the result with half the effort. After reading this information, riders must pay attention to the above three questions. Friends who have modified the brakes must go back and check after reading it. Nowadays, many friends, after becoming car owners, love to "beautify" their cars or "reinvent themselves" and make some simple car modifications, some for comfort and beauty, some for improving power performance and so on. Faced with a wide variety of modification projects, experts suggest choosing a modification project that suits their actual use needs and physical condition. Myth 1: The more modified stereos, the better. Some friends think that installing more auxiliary facilities such as wireless remote control and multi-disc converter can improve the actual effect of car stereos. In fact, the audio host is the original sound of the whole audio system and the core of determining the sound quality. Simultaneous speakers, amplifiers, overweight speakers (subwoofers), etc. It also has a great influence on the overall sound effect. If any one of these links is ignored, even if more auxiliary facilities with complex functions are installed, it will not help to improve the actual use effect of sound. So instead of making some expensive and laborious modifications, it is better to choose a good host. Myth 2: Sound insulation should be thorough. Some car owners excessively pursue the sound insulation effect when soundproofing their cars, demanding the ultimate sound insulation, and even hoping not to hear the sound of the engine. We can imagine that if the driver can't hear the sound from the road and power system, he will lose the acquisition and judgment of information about road conditions and car conditions, thus affecting driving safety. The ultimate goal of automobile sound insulation modification is not to eliminate all sounds, but to eliminate noise. Therefore, don't transform the space inside the car into an out-and-out "silent world", because it is a small loss. Myth 3: It has become a fashion to blindly install the tail wing, but not all models are suitable for installing the tail wing, because the role of the tail wing is to increase the stability of the car body, which is more critical for large-displacement cars, but for small-displacement cars, installing the tail wing will have a certain impact on speed. Besides, the tail wing is a spoiler. If we simply install the tail wing to achieve exaggerated or beautiful effects, it will have some negative effects. Because the function of the tail wing is to improve the characteristics of pressure and dynamic balance under the car body at high speed, it needs to be carefully adjusted to achieve the expected effect. Blind installation of the tail wing will have a negative impact when the car is driving at high speed, such as causing problems in one-way balance of the car and affecting the safety of the car. Myth 4: Dismantle the bumper for the "big encirclement". Some friends installed a "big enclosure" to make the appearance of the vehicle more beautiful and generous. Installing the "big surround" will really make the lines of the whole car look smoother, but some friends are too "beautiful" to install the "big surround" component on the original bumper, but choose to remove the original bumper and install it again. In this way, the car is beautiful, but the people on it are not safe. Removing the bumper of the original car means that if there is a collision accident, there will be no bumper protection, and people and cars may be more seriously injured. Myth 5: Cars with large-caliber exhaust pipes run faster. Pursuing speed is the dream of many friends. Some car owners think that installing a large-diameter exhaust pipe can make the car more powerful and sound magnificent. An auto repair expert said that simply replacing the exhaust pipe has little effect on power improvement. On the premise that the engine has not been modified, only replacing the exhaust pipe can not obviously improve the power, which is even more difficult for some natural intake vehicles with small displacement. From the practical operation, the most obvious effect of simply modifying the large-diameter exhaust pipe is to form acoustic momentum, but it will cause noise pollution. @20 19