When he returned to the car repair shop, it was almost six o'clock in the afternoon. When Zhang Zhiguo saw Zhang Yifei carrying a big bag, he quickly put down his work and went to help him with it.

"Old man, please send logistics parts and spare parts in the future. When I went there, I still had so many bags. I still had so many people back. I can't withstand the transportation of human flesh."

Zhang Yifei complained pantingly, "You must know that you need to pass the test when going back and forth to Hong Kong Island. Passing with a large bag and a small bag greatly increases the pass check time. With the effort of queuing, it may take several hours to pass the port that is only a few hundred meters. After two tossings, Zhang Yifei felt that it was even more tiring than driving an hour racing kart!

“This will exercise.”

What? And this kind of operation? Zhang Yifei was simply powerless to complain. If Zhang Zhiguo was not his father, he would have wanted to gesture. He would just talk about himself as a free labor force and use the saying of physical exercise. Why didn’t he find that the old man had such a talent for cold humor before?

After putting down all the things, he greeted Uncle Feng and Ah Hu in the car repair shop. Zhang Yifei went back to the upper floor to wash up. After all, the temperature in Guangzhou and Hong Kong Island is not low in winter, and this trip was covered in sweat.

After taking a shower, I ate instant noodles at home casually. Zhang Yifei went to the warehouse behind and planned to check out the Mitsubishi Evo and take out the engine modifications in the suitcase.

When he came to the warehouse, he saw Ah Hu in the warehouse, where accessories such as wheel hubs, shock absorbers, brake calipers and other accessories were placed on the ground. These were the chassis modification accessories that Zhang Yifei planned before.

"Ahu, when did the chassis accessories arrive?"

Hearing Zhang Yifei's voice, Ah Hu turned around and saw it. After finding that it was Zhang Yifei, he replied with a silly smile: "Brother Fei, you are here. These chassis accessories arrived yesterday morning, which means you didn't have long been to Hong Kong Island."

On the day when Mitsubishi Evo arrived, Zhang Zhiguo called Lu Ningping and asked him to buy these chassis accessories according to Zhang Yifei's request. In addition, they chose some commonly used accessories for major brands, so the extreme speed modification store was stocked and sent out using logistics on the same day.

Hong Kong Island is adjacent to Guangzhou and Shenzhen, so the transportation speed is much faster than that of other cities in the mainland. In just a few days, Zhang Yifei set out to Hong Kong Island, and the accessories arrived at the back foot. However, Feng Linmu was not in a hurry to modify it. When the car repair shop is closed tomorrow on the 29th day of the New Year, he can focus all his energy on the modification of the evo.

"Brother Fei, I really didn't expect that you knew the modification accessories so well. You chose the most suitable modifications for this evo. If all the modification processes of this Mitsubishi evo were completed, I think it would be fine even if it was placed on the track."

Ah Hu's tone was very excited because it was a rare thing for a car repairman to modify a top-notch performance sports car in this era.

"There are only a few well-known modification brands. You will know it by reading too much car magazines. Why, do you know these too?"

Zhang Yifei asked curiously, and he could feel from Ah Hu's tone that he knew the brand and function of these modifications. But in Zhang Yifei's impression, Ah Hu was just an apprentice in a car repair shop, and usually repairs civilian cars such as Santana, Jetta, and Fook, with a maximum of 100 Audi and Duke of Nissan. It seems that he didn't see any sports car in his store coming to repair it. How did Ah Hu know these things? Is it because he still brings wholesale in his rebirth these days?

Facing Zhang Yifei's inquiry, Ah Hu smiled at this time: "These are taught by Uncle Feng and his master. They said that I am so young and cannot build a simple civilian vehicle for the rest of my life, so I often get some complicated model information and spare parts for me to learn, and gradually I will know this."

Hearing this, Zhang Yifei suddenly realized. No wonder Uncle Feng said that he would let Ah Hu practice skills before, and the elderly would always retreat. He didn't expect that they had already started to train Ah Hu's maintenance knowledge and develop towards professional modification.

I thought I was the seed of the old man's career hope, but Ah Hu was earlier than me. This kid was not showing off. If it weren't for the modification of Mitsubishi evo, Zhang Yifei wouldn't have seen it.

Just as Zhang Yifei was talking to Ah Hu, Zhang Zhiguo and Feng Linmu also came to the warehouse. It is almost eight o'clock in the evening. The car repair shop was usually closed at six or seven o'clock, but tomorrow is the 29th day of the New Year, and the car repair shop will also enter the stage of annual holiday. Today, everything in the store is going to be done, so time is delayed a little late.

Feng Linmu came to the warehouse and saw Ah Hu put all the spare parts of the chassis. He knew that the boy probably couldn't bear it and planned to modify it. So he didn't bother to come in and said, "Since Yifei has come back now, and the car repair shop has also entered the rest time, then we will officially start the modification."

"Okay, Uncle Feng." Ahu responded first, and he was still anxious about Zhang Yifei.

"Then I'll trouble Uncle Feng and Ah Hu."

Zhang Yifei also replied politely.

"My family members also say this. If you can achieve good results in your career in the future, you will be worthy of our old guys."

Feng Linmu smiled and patted Zhang Yifei on the shoulder, as if he was encouraged, then took out the jack and began to prepare for chassis modification.

This chassis modification is mainly divided into two parts, namely the suspension system and the brake system. The suspension system part is the most important. It requires the replacement of the original shock absorber valve and top ball, and then the entire body posture is reduced by about 20 mm, which can reduce the turbulence under the vehicle and reduce wind resistance.

At the same time, due to the change in the body posture, the evo chassis also needs to add an adjustable coefficient stabilization rod to suppress the vehicle's roll when cornering at high speed, enhance stability and improve cornering limits.

These things are easy to say and easy to install, but subsequent adjustments are extremely troublesome. Just like the saying goes, buying a car is about three major items, and these three major items are the engine, gearbox and chassis.

The chassis is not that eye-catching than the engine and the gearbox, but it is one of the three most important components in a car. When designing a chassis adjustment of a car, it may require the research and development of hundreds of automotive engineers, because every millimeter error will affect the stability and comfort of the vehicle.

The same is true for modified suspension systems. If the parts are just replaced, then subsequent consequences such as chassis imbalance, four-wheel offset, inaccurate steering, and even serious consequences such as center of gravity shift, camber deformation of the frame control arm, etc.

Generally, when buying groceries in households, they can change to a low-level car, even if there are some small problems, they will not have much impact, because performance determines where the upper limit of violent driving is. However, high-performance racing cars are different. They often drive fiercely at hundreds of kilometers per hour, and the suspension pressure increases geometrically. A small amount of impact can easily lead to the vehicle losing control.

In later generations, Zhang Yifei was in professional teams and was equipped with professional automobile engineers in suspension modification, with little road testing and debugging and computer simulation. In this era, Zhang Yifei didn’t know if there were any computer simulation software and data, but it was obvious that his own car repair shop did not have it.
Chapter completed!