what! Car manufacturers secretly limit your motivation?

Presumably, everyone saw the product manual when they bought a car.

The above will not only introduce the length, width and height, but also list the output curve and maximum horsepower of the engine.

But do you know that the horsepower announced by automakers is not the maximum output that the engine can do, but is specifically set by manufacturers.

The horsepower set by the manufacturer is much lower than the performance that the engine could have

Why do manufacturers do this?

First, the conservative power output can obtain higher adaptability

A China-original BMW X5, which originated in the United States, only knew that its destination was China at the beginning of its production, but after entering China, it would face a Mohe that could reach minus 50 degrees in the winter in the north and the Tropic of Cancer in the south. On Hainan Island, in the west, there are an average of 34 kilometers of plateau in China. No one knows exactly where he will be sold, what kind of person he will drive, and what quality gasoline he can add. The same product must be used in such a complex environment to ensure the stability of the engine can only be achieved through two routes.

Increase costs, use better technology or hardware

Or

Tune the engine to a conservative shape in exchange for greater stability

I believe that if you are a manufacturer, you will not choose the first one. This will reduce the competitiveness of the product. Conservative adjustment is definitely the cheapest solution.

Second, some are to satisfy different budgets and enrich product lines

What is the demand for the product line may not be understood by everyone. Here can give you an example of CPU.

Friends who are proficient in computer hardware know that in the CPU, using the previous i5 example, whether it is 4460, 4590, or 4690K, there is no difference in their cost. Manufacturers in the same core architecture of the CPU, by locking the frequency multiplier to produce different models (to prevent users from overclocking into a high-frequency CPU, the user can only achieve overclocking through ultra-FSB), designed so many models More still to meet the needs of different budgets, and this is much more affordable than developing a single product.

This is also common in cars.

In order to meet the needs of different budgets and enrich the product line, the Audi A5 has a 3.0T model

The Audi A5 3.0T uses exactly the same engine and transmission as the S5.

Audi A5 sold after lowering 60 horses (the Audi S5 had 333 horsepower). In this way, the manufacturer did not affect the S5 status without increasing the R&D cost.

Third, the factory later "hidden recall"

The last kind of situation that was lowered by manufacturers may be encountered by many friends but everyone did not realize that before I had a B-class car, its 2.0T version had a congenital problem at the original factory, at a low speed. When the gas is running at shallow speed, there will be a buzzing sound. This sound is not something else. The engine knocks on the knocking cylinder. Even if the 98th gasoline is added, it will not be able to solve. If you go for a long time, it will seriously affect the life of your piston. .

Later, the manufacturer made a hidden recall. When you go to the 4S shop for maintenance, you will be given a system upgrade. Of course, this upgrade is to be quoted. After doing this upgrade you will find that the sound of "squeaky" is gone. But sensitive friends will also find that the car has become meat.

This "upgrade" has been done by many brands

In fact, solving this sound is very simple. We later solved this problem by adjusting the spark plug gap and did not need to reduce the power. However, this is not realistic compared to the standardized construction of 4S stores.

The above three points are the reasons why our cars are not playing their full performance. The key to setting engine output is "ECU".

Released too conservatively and lifted the original seal

Of course, it was unfair for the original factory to be set in a conservative state. I lived in the city and only added more than 95 petrol. I had a good habit of using cars, and no places where there were no asphalt. My car is set according to such a complicated usage scenario, is it not a loss!

Rewritten ECU service came into being

The brush program you often hear is the rewriting service of ECU. By changing the engine's engine running instructions, they reduce excessive conservation of this part and allow the engine to reach a relatively efficient operating state.

Brush ECU is actually not as deep as everyone thinks, it is similar to the smart phone brush system, as long as you have the appropriate software can be ECU brushing, the real high-net-worth technology is ECU writing, just like the mobile phone system, Many people can use it themselves, but few people know how to write systems. The ECU that we usually pay for writing is actually the copyright of this “system”. When the user is swiped, the operating person will not interfere with or modify anything. This brushing process is currently very mature in China.

In terms of the current supercharged model, simply do a program modification without any hardware changes, and the power can be increased by 20-30%, and it can greatly improve the low twist of the vehicle. This will further reduce the feeling of turbo lag and make the acceleration feel smoother. There is a kind of large displacement self-priming feeling.

This change of magnitude is generally called a first-order upgrade in the ECU upgrade. As long as you use the vehicle correctly and add the correct number of fuel, it will not substantially affect the stability of your car.

If you increase the output of the engine further on a phase basis, you will encounter problems with insufficient intake and exhaust efficiencies. This will increase the turbine load and the exhaust back pressure will be too high. There is a great safety risk to the engine.

At this time, it is necessary to tie in with the upgrade of the hardware. In general, it is necessary to replace the intake air exhaust and even the intercooler in order to meet this range of adjustments. It is known as a second-order upgrade. Of course, under the pure original condition of the vehicle, the ECU can also do the same tuning as the second-order upgrade, but this completely ignores the stability of the vehicle, so this operation is not recommended. (A lot of people think that they can't go in without changing hardware)

The second-order upgrade will have a 10-20% increase. Compared with the first-order upgrade, stability will not be much different.

A5 3.0T for Second Stage Hardware + Programs stock : Original

As we mentioned earlier, the Audi A5 3.0T is a victim of the manufacturer's product line, so the power to be sealed is even greater. After writing the same two-stage ECU as the S5, it can boost nearly 250 horsepower. . So you can see how important the ECU is for a car.

Larger turbochargers and supporting programs will be available for large-scale conversions. This upgrade will generally be able to achieve more than 80% improvement, but at this stage it will begin to test the bearing capacity of the engine. God machine can also be as stable as the original factory at this time. However, certain brands of machines fight at this time. So, ah, the conversion must be cautious, do not blindly ignore the stability of the pursuit of high-power.

As described above, the ECU brand is based on a set of oil products and hardware. The procedures for tuning are collectively referred to as canned programs. Generally, large brands will perform endurance tests on these programs. They are as stable as the original factory, so they are used. It can still be assured. (The canned program should not be a derogatory term.)

But if you have a turbine that is not specified by a programmer, or if your fuel is special, or if you live on a plateau or if you have more special needs (games), then the big brand canning program will no longer work. . A special ECU can meet your needs.

Special tuning ECU as its name suggests is further personalized customization. He can meet the needs of users more targeted, I have encountered before the plateau riders can not improve the performance of the vehicle after the brush can be improved after a lot of special adjustments. Special tuning is a process of repeated reading and writing of an ECU, which requires repeated reading and writing several times. Its focus is on the process. The advantage of the special tune is that it can meet the needs of individuals and vehicles, but if it is to change the horsepower, the stability is still the experience of the postgraduate technician. (can reconcile meeting two concepts)

With respect to writing ECUs, he can release the potential of the vehicle and greatly improve the driving experience of the vehicle. This is undoubtedly true. But more people are concerned about the stability after writing ECU. It can be said that after the brush is written, it will definitely affect the stability. After all, it increases the load of the hardware work, but this degree may not be as deadly as everyone thinks. For example, if you forgive my incomprehensible metaphor, the original engine was designed to have a service life of 500,000 kilometers, so after writing it may be only 450,000 kilometers. It does reduce the life of the engine, but 450,000 and 500,000 kilometers are Our general car owners have no effect. However, in some vehicles, it is necessary to think twice about writing ECUs. For example, I had contacted a 1.6T model of a certain brand before. Its piston is notoriously brittle. Cylinder.

(The picture is not that 1.6T model)

Like this car, still do not brush ECU as well, some cars are really poor, and it is not an exaggeration to say that the money of their four pistons can be used together to buy a piston of some god machine. Your car is not suitable for brush ECU, directly to check the price of your own engine piston will know.

Brush ECU suggestions

If you want to brush the ECU, I would like to mention a few suggestions. The vehicle must not start when the vehicle is just started or in the state of cold, because your engine has not reached the normal working temperature, and your power is improved a lot. It is very easy to cause extra wear. When the oil temperature reaches 70 degrees or more, you can step on the throttle. Many cars do not have an oil temperature gauge. Basically, after the water temperature reaches 90, another 5-10 minutes the oil temperature comes up.

Wear:oil temperature:oil temperature

In addition, the oil's label should be marked with a thicker label than before. For example, if the engine oil was 30 before, it would be better to upgrade to 40 after the program is written. It can better cope with high engine load, and then the high-speed engine sounds more vigorous.

After brushing the ECU, it is recommended that the 100°C viscous level is one level greater than before

The last point to brush ECU shop, to brush the program before the customer must check the condition of the car, which is responsible for the owner, can also reduce yourself a lot of unnecessary trouble, some cars are really sick, after brushing ECU Hidden problems have come out for a while, and your explanation is not clear.

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