1. Improvement of bumper
Some car owners may pay more attention to the safety of the car after getting a new car. They thought that the front and rear bumpers of the original car were not strong enough and had to modify the bumpers. This is no problem, and the annual review can pass.
Step 2 sound
Audio modification should be the most common car modification. Audio modification is not the overall function of the car, but also a good choice for music lovers. Audio modification is also allowed.
3. Modified variable sound exhaust valve.
Modifying the exhaust pipe valve should be the most popular choice in the modification shop, because it is a B artifact, even a car with tens of thousands of dollars can feel like a sports car after modification. That noise is simply a pleasure.
4. Bluetooth microphone
In fact, in a sense, this is to improve the driving safety of car owners and answer the phone with Bluetooth while driving. This modification is conducive to safety, and the traffic police also agree with it.
5. Tail wing
From the point of view of dynamic design, the tail is used to reduce the lift of the tail, because the tail is larger than the front. When the speed is too fast, the lift of the tail is greater than that of the front, so there will be a feeling of floating, but after adding the tail, the lift can be reduced. This traffic policeman is also allowed.
6. Body color decoration
The first is the color modification on the appearance. According to the national regulations, after changing the car body color, it is necessary to register the car body color change at the vehicle management office within 10 days, that is, to keep the photo color in the driving book consistent with the actual color.
7, body stickers
Body stickers are the most common way to modify the appearance of vehicles, and some people have ridiculed it. There are many stickers on the back window, as if the horsepower will be hundreds more out of thin air.
9, modified headlights
Adding lenses, angel eyes and refitting xenon lamps will definitely fail the annual inspection. However, the brightness of the light bulb can be appropriately changed on the basis of the original car. For example, replacing a light bulb with a color temperature of 4000 with a color temperature of 6000 will not affect the annual inspection of vehicles.
Precautions:
First, the transformation of the exhaust system
After the air intake system is reformed, the exhaust system should be further reformed. It is popular to change the tail section of the exhaust pipe into a straight row mode. You can see a thick exhaust port from the back, and you feel that the power of the vehicle seems to be great. If you change the front and middle sections of the exhaust system, you need professionals to do it.
Because the exhaust is too smooth, it may affect the torque of the engine at low speed; When replacing the front and middle sections of the exhaust pipe, attention should be paid to the technical content and actual test.
There is also a two-tone in-line barrel, which can be used for daily use with a small muffler, which is similar to that without modification. When playing with a car, remove the silencer and release sound waves.
Expert opinion: this change has little effect on improving engine power, and only pursues an auditory effect. Different brands of straight tubes have different sounds.
It is best to choose a straight barrel with loud and pleasant sound when accelerating and low sound when driving at a constant speed. Otherwise, the driver will feel tired and irritable after driving the vehicle for a long time. Due to different places of origin and vehicles, the prices vary greatly, with the basic price ranging from 900 yuan to 2,000 yuan.
Second, the change of engine ignition system
There is also a more popular modification option, which is to replace the engine ignition high-voltage line and spark plug with special models for modification. In order not to interfere with the electrical equipment of other vehicles, the resistance of ordinary ignition high-voltage lines will be artificially increased during manufacture. Car audio and car computer will not be disturbed by high voltage, which makes daily driving feel safe. But this design also consumes some high-voltage ignition energy.
In order to improve the ignition energy of the engine, the parts manufacturer specially provided a high-energy and high-pressure ignition wire for modification. The internal resistance of this high-voltage ignition wire is much lower than that of ordinary high-voltage ignition wire, and the ignition power passability is good; In order to overcome the influence on other equipment, the wire body shell is shielded by high-tech materials, which has a good appearance and improved durability; The wire core adopts multi-core to ensure smooth lines.
Modification of professional spark plugs for high-voltage ignition wires. Japanese NGK and Taiwan Province products are very popular in the market. The ignition positive poles of these spark plugs are needle-shaped and can improve the ignition energy. Precious metal materials such as platinum and iridium are adopted, so that the spark plug can withstand the high temperature above 2000℃, and the laser welding technology also makes the discharge point of the spark plug more accurate.
Expert opinion: There are many models and brands of high-voltage ignition wires used for refitting in the market. High-end recommended NGK products, exquisite appearance, excellent quality technology, basic price around 1500 yuan, high cost performance; Volkswagen spark plugs can choose 9-core low-resistance and high-voltage ignition wires made in Taiwan Province and one set from 800 yuan to 1.200 yuan. The price is relatively cheap and the effect is good.
There is also a little-known modified ignition wire, which has a general effect and the price is between 400 yuan and 500 yuan. Pay special attention to the product performance parameters on the package when purchasing.
Thirdly, the improvement of fuel pressure control valve.
The popularity of engine multi-point injection brings convenience and benefits to modification. Fuel supercharger is a good configuration for EFI engine to improve power. On the engine fuel supply system, there is a fixed and non-adjustable device-fuel pressure regulator. The main engine factory is set at 2.0~2.5KG/CM, and the output pressure of gasoline pump in gasoline tank is generally above 5KG/CM.
Therefore, it is possible to increase the fuel pressure to 3.0~3.7KG/CM by installing an adjustable regulator after the non-adjustable fuel pressure regulator. After installation, the amount of oil passing through the nozzle per unit time increases; After the pressure increases, the gasoline sprayed from the nozzle has better atomization effect and more complete combustion.
Almost all engines equipped with fuel supercharger can feel the improvement of vehicle power.
Expert opinion: According to foreign test results, the fuel supercharger can help improve the engine power by about 10 horsepower. But at the same time, the air intake device must be modified, otherwise it may cause insufficient air intake and insufficient combustion.