How to modify a car to pass the annual inspection? This has always been a headache for friends who modify their cars. The editor of Xiamen Kench tells you that the following modifications can successfully pass the annual inspection!
How to modify a car to pass the annual inspection
1. Increase the throttle
It can significantly increase the intake flow, but due to the low oil-gas mixture ratio, the engine will knock.
2. High compression ratio, light piston
Reduce the load on the engine crankshaft and connecting rod, the engine responds quickly, and the explosive power is stronger.
3. High-angle camshaft
The valve lift and opening angle are larger, ensuring that more combustible mixture enters the cylinder and the exhaust is smoother.
4. Main reduction ratio and gear
Increase the main reduction ratio, and increase the gear ratio of 1~4 gears, which can improve the acceleration performance of the whole vehicle, but at the cost of reducing the maximum speed. Therefore, the tail gear can be increased. The gear ratio of 2~4 gears is increased. The 5th gear becomes thinner to make up for the loss of speed.
5. High-voltage wire
Use low-resistance wire to replace the original car's high-resistance fire wire of about 5000 ohms, so that the energy released by the ignition coil is greatly transmitted to the spark plug, but be careful of symptoms such as fire.
6. Balance bar: Connect the vehicle shock tower to enhance the rigidity of the vehicle body. Prevent the body from deforming due to excessive control.
7. Spark plug
Low cost. Life is as short as 20,000 kilometers. Poor high temperature resistance, ordinary nickel-copper spark plugs can last up to 100,000 kilometers. Pay attention to the heat resistance value when choosing. Too low engine acceleration will produce carbon deposits. Naturally aspirated cars in Japan can achieve the purpose of strengthening at 5 to 7 degrees, while turbocharged cars need more than 7 degrees.
8. Various instruments
The original car pointer instrument usually cannot meet the requirements of the refined monitoring working conditions of heavy-duty modified vehicles due to inaccurate data transmission, and needs to be replaced.
9. Fuel control valve
The original car return valve is generally 22.5~4kPa, and the pressure value is different for different models and cannot be adjusted.
10. Ground wire
By strengthening the ground wire, the impact of various electrical equipment can be reduced to ensure power generation and stable operation.
11. Aerodynamic kit
Aerodynamic kit, usually composed of forward air dam. Double front fenders. Side skirts. Directional power steering. Aluminum alloy is heavier. There are light but brittle cold carbon fiber and light but tough hot carbon fiber to choose from, but hot carbon fiber is common in sports cars because they are very expensive.
12. Computer calibration
Modify the ECU program, increase the fuel supply, delay the oil cut-off time, and adjust the horsepower output linearity.
13. Light flywheel
If the balance flywheel is too heavy, it will affect re-acceleration. Replacing the light flywheel can get a good acceleration response, and the oil separation should be more precise.
14. Wheels and tires
High-profile performance tires are more responsive when the vehicle transitions, have less deformation, and increase grip. And they are lighter. High hardness. Compared with cast aluminum alloy wheels with good heat dissipation, forged alloy wheels are lighter, stronger, and more expensive.