"Brother Fei, you even brought the clutch plate. I just thought about this problem, because I was afraid that the gearbox would not be able to withstand the modified engine torque."

Hearing this, Zhang Yifei also replied with a smile: "Ahu, how much horsepower are you going to change this car to?"

"Road up at least five hundred, the bigger the better!"

There is a famous saying in the power industry, that is, the power is flying bricks! That is to say, as long as the power is enough, you don’t have to care about aerodynamics at all. Even just a brick can fly into the sky!

Of course, this is just a relatively exaggerated example, but Ah Hu is a supporter of violent power. Five hundred horsepower is just his basic goal. If possible, he is even willing to change the car to thousands of horsepower, but the current conditions do not allow it.

This is the potential of 4g63. The reason why evo can become a classic of the generation with GTR and Toyota Supra is because its engine modification potential is amazing. Even in twenty years, in addition to the small problems of fuel consumption and emissions, its power is still good at the top supercars.

But if you want to change to such an exaggerated power, heat dissipation is the biggest problem, because 4g63 is a cast iron engine. This material is not advanced. Even if it is a civilian-grade grocery car in later generations, many of them are direct injection of aluminum alloys, but precisely because it is cast iron, the strength is much higher than that of aluminum alloys, which is suitable for modification.

The disadvantage is naturally that heavy and heat dissipation are not good. Evo fourth generation has improved the intercooling cooling system to allow the engine to maintain a better working condition, but this is still not enough. A larger horsepower represents more exaggerated heat and requires major modifications.

Chen Zhi next to him heard the words of 500 horsepower and couldn't help but smile: "The bigger the horsepower, the better. First, the accessories are incomplete. This change basically requires replacement of the entire engine bearing, and it also needs to be matched with the gearbox of the body. If it is too high, it is easy to push the head. I think the most suitable range is about 400p horsepower."

400p horsepower is exactly the reasonable number in Zhang Yifei's mind. As a rally driver in later generations, he drove a rally car according to the WRC standard, and the maximum power limit is only 300p.

However, this is not the limit of rally racing. There was a group B group in the 1980s. This group is also called the unlimited modification group. That is to say, as long as the manufacturer has enough strength, you can even change it to an aircraft power, so there are various monster-level rally racing cars with a speed of more than 500p horsepower and accelerating from 0 to 100 kilometers for 2 seconds.

Later, with the popularization of racing safety planning, the unlimited modification teams of various FIA events were basically in ruins, and there were fewer scenes of desperate tightrope walking.

Because of different types of events, rally cars are more interested in explosive power of 0-100, and the power requirement is second, and 300p horsepower is completely enough.

The RV race requires higher horsepower. The 2.0t displacement power of the CTCC (China RV Championship) super group in the later generations is around 450p, but you should know that now 20 years ago, the power of 400p is enough for Zhang Yifei to go on the track.

If you have to create some crushing power, the time it takes to modify the engine is undoubtedly too long. Zhang Yifei doesn't have so much time to test the engine. As long as news comes from Uncle Lu, he will go to Hong Kong Island as soon as possible.

Chen Zhi and Ah Hu are both young people, and their hands are very fast. They almost started to dismantle the Mitsubishi Evo during the conversation. Although they did not intend to completely squeeze the Mitsubishi Evo's 4g63 engine this time, they are still preparing to replace some 100mm crankshaft and other accessories to prevent the cylinder from being exploded under high horsepower for a long time.

In the afternoon, Feng Linmu also came over. Zhang Zhiguo closed the front car repair shop and stopped accepting orders. The four repairmen in the entire car repair shop all circled around this Mitsubishi evo, and their movements and maintenance habits made him feel like a racing maintenance team.

Zhang Yifei was very excited to feel Zhang Zhiguo's emotions. Perhaps over the years, he has finally experienced the complete team division of labor and cooperation again, and overhauling the scene of an event-level performance car. This is where people's passion rekindled.

The engine was disassembled to be a more professional collaboration division stage. Feng Linmu was responsible for the replacement of the crankshaft, Zhang Zhiguo himself was responsible for the transformation of the intercooling system, and Chen Zhi didn't know where to get a notebook that was considered an "antique" in Zhang Yifei's eyes, and started to brush Evo's evo, and the last part was Ahu's clutch replacement.

It can be said that this is what a professional team should look like. Even though Zhang Zhiguo thought he had no hope of returning to the track over the years, he still led his apprentices according to the standards and behavioral logic of the event engineer. Chen Zhi and Ah Hu were both like this.

Zhang Yifei can understand the hardware transformation, the only thing that makes him feel a little novel is Chen Zhibiao.

Ecu is simply the driving computer of a car. If the engine is compared to the heart, then Ecu is the brain. All operational movements of the entire car need to send data to regulate.

It can be said that ecu is a software problem in automotive engineering. Most auto repair personnel cannot reach this level. Ecu data was previously preserved by Feng Linmu. However, he did not expect that he handed over such an important aspect of ecu to Chen Zhi this time, which indirectly means that Zhi Ge has reached the level of an automotive engineer, rather than a simple maintenance technician.

There is a scene in the movie "Initial D". Edison Chen brought a computer to the engine cover, and various data on the screen. Then Jay Chou came over to ask when he saw it. He also asked if the car was broken, but Edison Chen said he was changing the car.

However, in the movie, Edison Chen also involved the chassis adjustment data. Engine modification requires the export of the original ECU data and then rewrite it. This involves rewriting some data such as ignition advance angle, fuel injection volume, fuel injection time, and the concentration of combustible mixture. It can be said that the level of professionalism is very high.

Whether this evo can perfectly match power and torque in the end depends on Chen Zhi's programming level.

The mushroom heads of hkc were installed, the sard's intercooling pipes were replaced, and the spare parts were modified in an orderly manner. Zhang Zhiguo also knew that Zhang Yifei had a very tight time this time, so they could say that they were working overtime. The business in the previous car repair shop was completely shelved, and even eating a boxed lunch in the warehouse.

Two days later, the hardware transformation was almost the same, and the rest was trial drive debugging.

To be honest, this speed can be described as rapid as being in ordinary car repair shops. However, in event-level maintenance teams, it can only be said to be at a general level.

You should know that in a rally race, a crash overhaul is simply common. In order not to affect the competition, the maintenance time is calculated in hours.

What is most well-known to the public in racing team efficiency is probably the scene of changing tires at the F1 event. Think about how long it takes to change a tire in a general car repair shop, and how long it takes to change a tire in a F1 to four tires is only a few seconds. This is why, never use hobbies to challenge other people's professions. The peak professional skills are really too strong.

Chen Zhi accompanied Zhang Yifei during the road test, but this time he didn't find a large driving school to borrow the venue.

Chen Zhi kept recording Zhang Yifei's posture habits, and then debugged various ignition and fuel replenishment times in an effort to achieve the unity of man and vehicle.
Chapter completed!