When he returned to the car repair shop, the time was close to six o'clock in the afternoon, and Zhang Zhiguo saw Zhang Yifei carrying a large bag and a small bag, so he quickly put down the matter at hand and went over to help him.

"Old man, please send spare parts in the future, when you go, there are big bags and small packages, and there are still so many when you come back, and you can't bear the transportation of human flesh."

Zhang Yifei panted and complained, you must know that you need to go back and forth to Hong Kong Island, and passing through customs with large bags and small bags greatly increases the time for customs clearance, plus the effort of queuing, it may take several hours to pass through the port of just a few hundred meters, and after two tosses, Zhang Yifei feels more tired than driving a kart for an hour!

"It's a workout."

What the? And this kind of operation? Zhang Yifei was simply powerless to complain, if Zhang Zhiguo was not his father, he would simply want to compare the middle finger. Treat yourself as free labor, and use the term "exercise", why didn't you find that the old man had such a talent for cold humor before.

After putting down everything and saying hello to Uncle Feng and Ah Hu in the car repair shop, Zhang Yifei went back upstairs to rinse. After all, the temperature in Guangzhou, Shenzhen and Hong Kong Island in winter is not low, and this trip is also a stinky sweat.

After taking a shower and casually eating instant noodles at home, Zhang Yifei went to the back warehouse, planning to take a look at the Mitsubishi EVO, and by the way, take out the engine modifications in the trunk.

When he came to the warehouse, he saw that Ah Hu was in the warehouse, and there were accessories such as wheels, shock absorbers, brake calipers and other accessories on the ground, which were the chassis modification parts planned by Zhang Yifei before.

"Ah Hu, when did the chassis parts arrive?"

Hearing Zhang Yifei's voice, Ah Hu glanced back, and replied with a smile after finding that it was Zhang Yifei: "Brother Fei, you are here, these chassis parts arrived yesterday morning, that is, not long after you went to Hong Kong Island." ”

On the day these chassis parts arrived at Mitsubishi EVO, Zhang Zhiguo called Lu Ningping and asked him to buy them according to Zhang Yifei's requirements. In addition, the accessories selected are commonly used by some big brands, so the extreme speed modification shop has sufficient stock, and it will be sent out with logistics on the same day.

Hong Kong Island is adjacent to Guangzhou and Shenzhen, so the transportation speed is much faster than other cities in the mainland, and it only takes a few days to come to the car repair shop. It just so happened that Zhang Yifei set off for Hong Kong Island on the front foot, and these accessories on the back foot arrived, but Feng Linmu was not in a hurry to modify, and when the car repair shop was closed on the 29th of the New Year tomorrow, he could put all his energy on modifying EVO.

"Brother Fei, I really didn't expect you to know so much about modification accessories, and choose the most suitable modification parts for this EVO, if all the modification processes of this Mitsubishi EVO are completed, I think even if it is put on the track to run, it will be no problem."

Ah Hu's tone was very excited, because in this era, it is also rare for an auto mechanic to modify a top-notch performance sports car by himself.

"There are only a few well-known modification brands, and you will naturally know how many car magazines you read, 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 modified parts. But in Zhang Yifei's impression, Ah Hu is just an apprentice in a car repair shop, and he usually repairs civilian cars such as Santana, Jetta, and Fukang, and at most adds an Audi 100 and Duke Nissan such as "luxury cars".

In the face of Zhang Yifei's inquiry, Ah Hu smiled at this time: "These are all taught to me by Uncle Feng and Master, they said that I am so young that I can't repair a simple civilian car for the rest of my life, so I often get some complex model information and spare parts for me to learn, and slowly I will know this." ”

Hearing this, Zhang Yifei suddenly realized, no wonder Uncle Feng said before that let Ah Hu practice his hands, and they old people would have to retreat. Unexpectedly, they had already begun to train Ah Hu's maintenance knowledge level and develop in the direction of professional modification.

I thought that I was the seed of the old man's career hope, but Ah Hu was earlier than himself, this kid was not obvious, if it wasn't for the modification of Mitsubishi EVO, Zhang Yifei really didn't see it.

Just when Zhang Yifei was talking to Ah Hu, Zhang Zhiguo and Feng Linmu also came to the warehouse. Now the time is almost eight o'clock in the evening, the car repair shop is generally closed at six or seven o'clock, but tomorrow is the twenty-ninth of the New Year, and the car repair shop will also enter the stage of annual leave.

Feng Linmu came to the warehouse and saw that Ah Hu had placed all the chassis spare parts, and knew that this kid probably couldn't bear it anymore and planned to modify it. So he didn't grind, and when he came in, he said: "Now that Yifei has returned, and the car repair shop has also entered the rest time, let's officially start the modification." ”

"Okay, Uncle Feng." Ah Hu responded first, and he put Zhang Yifei in a hurry.

"Then it's going to trouble Uncle Feng and Ah Hu."

Zhang Yifei also replied politely.

"My family also said this, and if I can run well in my career in the future, even if I am worthy of our group of old guys."

Feng Linmu smiled and patted Zhang Yifei on the shoulder, which was a word of encouragement for him, and then he took out the jack and began to prepare for the chassis modification.

The chassis modification is mainly divided into two parts, namely the suspension system and the braking system, of which the suspension system part is the most important, it is necessary to replace the original shock absorber valve and top ball, and then reduce the entire body attitude by about 20 mm, which can reduce the turbulence under the car and reduce wind resistance.

At the same time, due to the change of body attitude, the chassis of the EVO should also be equipped with an adjustable coefficient stabilizer bar to suppress the roll of the vehicle when cornering at high speed, enhance stability and improve the cornering limit.

These things are easy to say and easy to install, but subsequent adjustment is an extremely troublesome thing. As the saying goes, buying a car is to look at three major parts, and these three major parts are the engine, gearbox and chassis.

The chassis is less impressive than the engine and gearbox, but it is one of the three most important parts of the car. When designing the chassis tuning of a car, it may require the research and development of hundreds of automotive engineers, because every millimeter of error will affect the stability and comfort of the vehicle.

The same is true for modifying the suspension system, if only the parts are replaced, then the subsequent consequences such as chassis imbalance, four-wheel offset, inaccurate steering, and even serious shift of center of gravity, camber deformation of the frame control arm and so on.

Generally, the household grocery shopping car is changed to a low stomach or something, even if there are some small problems, it will not have much impact, because the performance determines where the upper limit of violent driving is. But high-performance racing cars are different, often hundreds of kilometers per hour of intense driving, suspension pressure is geometric multiples, the slightest impact can easily cause the vehicle to lose control.

Zhang Yifei later worked in a professional team, and the suspension modification was a professional automotive engineer, with a little road test tuning and computer simulation. In this era, Zhang Yifei doesn't know if there is any computer simulation software and data, but it is obvious that his own car repair shop does not have it.

Therefore, suspension tuning pays more attention to the experience and skill of the maintenance master, but Zhang Yifei believes that Feng Linmu, as a member of the Chinese rally champion team, has undoubted strength.