"Ladies and gentlemen, because this track is special, each of you has an hour to modify your own racing car, hurry up and transform a four-wheel drive car that can drive perfectly underwater!" The four-wheel drive fighter shouted, which made all the fighters breathe a sigh of relief.

This time they were given an hour to do so, and it was fine, and they could think carefully about how to deal with the rigors of the track.

First of all, special waterproof tires are a must, because only waterproof tires can drive stably in water.

But this is not the most critical issue, the most critical issue is how to protect the 4WD from leakage.

Since the four-wheel drive car has rushed into the water, the water is inevitable, and once the water is in, it will have a fatal impact on the motor and battery.

"What the hell should I do?" All the players were lost in thought.

Among them, the players who purchased the silverfish engine showed a bright smile on their faces, because the silverfish engine is a special engine specially made for underwater driving, with a very strong waterproof effect, according to the engine's manual, the silverfish engine can be kept in the water for more than an hour.

As a result, the players who prepared the silverfish engine smiled brightly, and those who were not prepared were like ashes.

Of course, it's not enough to have an engine, you also need a battery that is waterproof and the current is not affected by water.

"I don't know if there are many impurities in this water, if there are too many impurities, it will be troublesome!" Water itself is not a conductor, but if it contains impurities, that's bad!

Looking at the pool in front of him, Liu Nian fell into contemplation, the conductivity of water is determined by the number of impurities in the water, if there are many impurities in the water, such as sewage or something, the four-wheel drive car is prone to short circuit.

In fact, Jia Yapeng has not yet perverted the degree of using sewage to compete, this is the pure water that Jia Yapeng specially obtained, although it has not reached the point of pure water for experiments, but there are not many impurities in it, at most it has a little bit of weak conductivity, and the low current of four-wheel drive vehicles will not have a great impact.

This underwater track is actually scary to look at, and it is really not so scary, even if the unmodified four-wheel drive vehicle can run underwater for a while, but it is naturally better to be able to waterproof the motor and battery.

Liu Nian naturally couldn't afford the special silverfish engine produced by Daqian, and at the same time, a huge problem of Liu Nian's racing car itself also emerged.

Because the engines transformed by Liu Nian have no engine shells, they can only rely on the engine compartment to protect the coils of the engine.

But it's not really completely enclosed, after all, the power in the engine room still has to be output through the gears and shafts, so the engine room must have a hole for the shaft to enter, and if the car goes into the water, then the water will enter the engine room through the hole, and that's the end of it.

With a tight schedule and a lack of materials, the little guy didn't have the time to rebuild the engine or the car's site, but without a complete rebuild, the problem of water ingress could not be solved, which was a huge problem.

"What are you going to do, little one?" Jia Yapeng, who was sitting in the VIP room, looked at the little guy who was scratching his head and cheeks, showing a curious expression, he wanted to see if this genius little guy had a way to deal with the problem of waterproofing.

Time passed minute by minute, an hour was coming quickly, and many children did not come up with a good way at this time, so they could only reluctantly do some waterproof work, and then took the four-wheel drive car to the starting point of the track.

"Let's go!" As soon as the four-wheel drive fighter gave the order, all the four-wheel drive vehicles were placed on the track at the same time, and then they galloped up.

The top few in the semi-finals are not surprisingly on the strongest side, but the distance between them and the cars behind them is not large, after all, everyone's parts are similar, and the difference is only a few small problems.

But soon, there was a car that fell behind with a very obvious gap, and this car was Liu Nian's Evangelion.

At this time, the track has obviously not entered the bottom of the water, but the speed of Liu Nian's Evangelion has become quite slow, only about 2/3 of the speed of other cars, and naturally it was left to the end at the beginning, when many cars have entered the second corner, his Evangelion has not yet entered the first corner.

"Hey, there seems to be a problem with our evangelion, what's going on? Did it damage the function of the car during the transformation process just now? The four-wheel drive fighter in charge of the commentary asked curiously with the microphone, and the other audience members were also very curious, but they didn't understand what was happening.

"It's strange, this little guy's car seems to have become very heavy, especially the rear of the car, it looks like a lot of weight!" As a professional, Jia Yapeng, when he saw the driving condition of the evangelion, he vaguely saw a clue, but what the specific reason was, Jia Yapeng did not know.

After about two minutes or so, the cars running in front have all entered the underwater track, and at this time, Evangelion has just finished 2/3 of the distance, and has been pulled away by all the children for nearly 30 seconds, under normal circumstances, this is a gap that is absolutely impossible to catch up, Liu Nian can already admit defeat.

However, Liu Nian's face did not have too much anxious expression, but was full of confidence, which made many viewers curious about this child, and at the same time, the first batch of cars that took the lead in entering the water also began to have various problems.

First of all, the speed of the car, the resistance of the water is far greater than the resistance of the air, so the speed of the car was originally nearly 30 meters per second, after entering the water, it plummeted to about 10 meters per second, which is a speed that a child can catch up with as long as he runs a little.

And in some cars, the speed of the car drops directly to about 7 meters per second after entering the water, which makes all the children anxious.

From here, the cars continued to divide into two echelons, and all the cars that could reach speeds of more than 10 meters per second rushed to the front, and the rest of the cars gradually fell behind.

Some of the cars slowed down and came to a slow stop.

The owners rushed into the water, picked up their precious cars, and put them on two new batteries, but to no avail. This is because their engines have been flooded and completely scrapped, and only by replacing the engines can they regain power.

But it takes a lot of time to replace the engine, and they lose.

Just when these children were desperate, a figure slowly chased after them, and at the same time, his evangelion, like a blue submarine in the water, swam leisurely in the water, directly overtaking these unlucky children and chasing them to the second echelon.

"Isn't this car left behind? Why did the speed suddenly become so fast!! Seeing the evangelion just catching up like this, the children who saw this scene were shocked and muttered to themselves.

But the kids were wrong, Evangelion wasn't getting faster, he just got a lot less slow than the other cars after he got into the water.