The engine used on the Corvette C3 ranges from the entry-level 5.0-liter V8 "small-block" 305 (this 305 refers to a displacement of 305 cubic inches, which translates to 5.0 liters, and all the numbers that appear below after the block are displacements in units of "cubic inches") to the 7.4-liter V8 "big-block" 454, there are more than 10 models in the whole series - yes, this top-of-the-line 7.4-liter V8" The big-block 454 engine is a generation of magic machine codenamed LS6, the dream machine of countless modification enthusiasts and countless "V8 cancer" patients.

But the "big-block" 454 is not the strongest model of the block series, the strongest model of the block series is the "big-block" 496, a monster with a displacement of up to 8.1 liters, a maximum power of 330 horsepower, and a maximum torque of up to 769 Nm.

As for whether the "big-block" 496 can be installed on a Corvette C3, there is no need to worry, all block series engines have the same mounting position, and the Americans of this era have always had a tradition of wasting space, as long as the next "small-block" 305 can be installed, the "big-block" 496 can be installed.

"That's right, 'big-block' 496," Chen Geng nodded: "The piston stroke of the engine needs to be readjusted, and I request that the displacement of the engine after the stroke be adjusted from the current 8.1 liters to 9.2 liters......"

Since you can't resist, then the enjoyment of resignation has become the choice to think, hearing the power plan given by Chen Geng, Bob's engineer thinking was immediately awakened, and he immediately took the words: "But then the original crankshaft can not be used, we need to customize a crankshaft with higher strength and greater radius of rotation, oh, by the way, maybe the lower end of the cylinder block will be cut off." ”

Anderson immediately picked up the words: "The crankshaft, pistons, and connecting rods must all use high-strength forged materials, and only in this way can the weight be reduced as much as possible under the premise of ensuring strength." ”

"The original valve system also needed to be readjusted, and the engine of the racing car was in a high-revving state almost all the time, so the valves had to be kept open and closed for a longer time, and when designing the camshaft, the car condition of the intake advance angle and ignition advance angle had to be taken into account......

"Air intake manifold, cylinder head, valve and valve ejector rod and other components are all new, if the calculation results are ideal, I recommend that the cylinder head be replaced with aluminum alloy material, weight reduction ......"

"The diameter of the throat of the carburetor must be increased, the original carburetor is definitely not enough, I recommend using 4 large-diameter Weber carburetors, and the two cylinders share a carburetor......"

"In this way, the compression ratio is ...... I'll do the math, well, there's 10.5, and the compression ratio of 10.5 ......" Bob, who has completely entered the state, treats Chen Geng as nothing, and keeps writing and drawing on the paper: "In this way, the maximum power is about 640 to 680 horsepower, and the maximum torque is more than 800 Nm......"

"You forgot about the carburetor with the amount of oil......

"Yes, yes, carburetor," Bob patted his head, wrote and drew for a while, and said affirmatively: "I haven't determined the specific model and performance of the carburetor, and the accurate performance data is not available now, but there is no problem with increasing it by another 10%......"

"It's just that this is not enough," Chen Geng, who had not spoken much, spoke again at this time: "If you want to win the competition, this power is far from enough, and then you can use a large-size turbocharge." ”

"Still going turbocharged?"

Bob and Anderson were both frightened by their boss's madness: "Is this necessary? In the current situation, the maximum power is expected to exceed 700 hp and the maximum torque is also more than 880 Nm......"

Chen Geng explained: "What I want is the ability to accelerate instantly. ”

If he didn't think it was unnecessary, Chen Geng planned to use turbo and mechanical dual supercharging, but after seriously considering and comparing the vehicle performance data of previous modified car Grand Prix, he felt that there was no need for this, so he gave up.

Listening to Chen Geng's reason, Bob and Anderson immediately understood what Chen Geng wanted: the supercharged engine, especially the turbocharged engine, when the supercharging system was positively pressurized, the sharp acceleration feeling as if it had been smashed in the back by a battering ram could not be done by a naturally aspirated engine in any case.

After glancing at Anderson, Bob said in a deep voice: "On the premise of ensuring controllability and reliability, I suggest that the maximum power and maximum torque of the supercharger system after positive pressure are calibrated to 900 hp and 1200 Nm respectively, what do you think?"

"That's enough," Anderson agrees with Bob's premise, "but what about the gearbox? And the three-speed sequential racing gearbox? Isn't it a bit of a waste?"

Chen Geng, who had been quietly listening to Anderson and Bob's discussion, interrupted them loudly: "The gearbox has been changed from a three-speed sequential to a five-speed sequential one. ”

"Five-speed sequential racing gearbox?" Bob hesitated, of course fifth gear is better than third gear, fifth gear means that there is more gear space than third gear during the race, there are too many places to use it, but the question is: "Boss, there is no such transmission or five-speed conversion kit for sale on the market, we have no experience in designing competitive five-speed sequential transmissions, if you plan to use a five-speed gearbox, you can only design it yourself, we may not be able to help you in this matter......"

Chen Geng knew that Bob was telling the truth, in this era when civilian gearboxes were still in the four-speed era, the gear design of the gearboxes of all kinds of professional racing cars was still in ancient times: in addition to F1, which has begun to use five-speed gearboxes, even the top cars of world-class events such as the famous World Rally Championship use four-speed gearboxes.

In the United States, which is obsessed with large displacement and pursues "as long as the power is sufficient, the bricks can fly into the sky", there is basically no shadow of the four-speed gearbox, the three-speed gearbox is popular, and even in some straight-line acceleration races, the two-speed gearbox is also popular (the boss hoss, which is known as the world's largest displacement motorcycle, is a gearbox with only two gears, which is simply a reversal of history).

In Lao Mei's view, if the speed does not meet the requirements, it must be that the displacement of the engine is not enough.

What to do?

Simple, just increase the displacement, the gearbox? What's that?

Compared with the civilian helical gearbox, the professional competitive gearbox adopts a straight gear design, with higher precision requirements and gear ratio design requirements, higher transmission efficiency, of course, the noise is also outrageous, let two guys who have not independently designed the gearbox to make a five-speed manual gearbox, they dare to design, Chen Geng does not dare to use it: "The design of the gearbox is handed over to me, but can you find a precision machining company with sufficient processing capacity in Detroit?"

Bob and Anderson looked at each other and laughed in unison......

"Hey...... Boss, this is Detroit!"

"BOSS, Detroit has the best precision manufacturing capabilities in the world, and if you can design it, you can find a manufacturing company that can bring your design to life. ”

That's right!

Scratching his head, Chen Geng was also a little embarrassed: "OK, the general framework of the power system and transmission system is so determined, we will make the detailed plan back, strive to complete it in two months, and then use two months to debug and determine the final plan, and finally leave me one and a half to two months to practice." ”

"No problem. Bob nodded repeatedly.

It was Anderson who couldn't help but ask Chen Geng: "Boss, don't you still want to participate in the competition of the self-made car group?

Chen Geng did not answer, but said: "You go and talk to Miss Elizabeth, and say that the company wants to buy 10 Honda CBX1000 motorcycles, and you have to be fast." ”

Honda CBX1000?

Anderson and Bob are both surprised by Chen Geng's decision, Honda CBX1000 is a motorcycle that Honda just launched this year, using the design style of a street car, of course, this is not the point, the point is that Honda CBX1000 uses an inline six-cylinder air-cooled engine, which is also the first motorcycle in Japanese production to use an inline six-cylinder design, which is simply crazy!

The 1,047cc inline-six engine features a dazzling array of new technologies of the era: DOHC with four valves per cylinder, a top rev of 9,000 rpm and a maximum power of 105 hp......

Six cylinders with a total of 24 valves......

With all the data and technical indicators so frustrating, Anderson and Bob really couldn't understand why the boss wanted to buy this motorcycle, and it was 10 of them, could it be that he planned to use the engine on this motorcycle as power?

It's a good idea, but 105 horsepower isn't enough.

Either you're going to use two engines, and the control system is going to be complicated......

Forget it, don't think about it, Bob shook his head, he finally remembered something he had always wanted to ask, but always forgot: "By the way, boss, what's the name of our tuning company?"

"Devil's claws. Chen Gengdao, at the same time, quickly picked up the paper and pen on the table and drew a pattern: a green claw mark that seemed to have been scratched by the devil's claws: "What do you think of this plan?"

Well, that's right, it's the three claw marks that can be seen on many modified cars and modified motorcycles, so that many people think that this is the logo and logo of a well-known modified brand when they see these three claw marks, but they don't know that this brand actually belongs to a functional drink.

Anyway, now that the devil's claw functional drink has not appeared, Chen Geng is not welcome, in his opinion, the devil's claw as a car modification brand, than as a functional drink brand, has a lot of B class.

"Monster energy?" Bob's face was full of mad frenzy as he looked at the claw marks made by the devil on the paper, "This sign is so wild, so powerful, and therefore penetrating...... Boss, you're so powerful, we're calling it Devil's Claw!