After the 1990s, cars were not made with thermostatic intake systems. Since then, there have been a lot more cold air intakes because of this. They lower the temperature of the air as it goes into the combustion chamber, which lets more oxygen in.
The density of cold air is greater than that of warm air. So, it contains more oxygen per unit volume. Oxygen is needed for combustion, and you need as much of it as you can get.
By adding more oxygen to the combustion chamber, the fuel will burn completely once it is added.
How a Cold Air Intake Works
Cold air intakes lower the temperature of the air by following certain design rules. Most modern cars put their intakes in an area of high pressure in the engine bay.
If your car has a forced induction system, the type of intake will depend on that. If it has a naturally aspirated engine, the intake will be different.
They were made to improve the flow of air and lower its temperature. Only intakes that do both of these things actually give your car more power. If they are too strict, it would cancel out any possible benefits.
Most aftermarket intakes try to make laminar flow by forcing the air to move in parallel. When it goes in this way, there is less friction and resistance, so it works better.
We can only make the air flow better so much before other parts of the engine stop us. If we send too much oxygen into the chamber, we might not have enough fuel. Tuning the car’s ECU can increase the amount of fuel that gets to the engine.
Getting rid of turbulence makes it easier for air to flow into the intake system. Once it’s inside the intake, the path to the chamber is straight. Many intakes shorten the path of delivery to make things more efficient.
Some use the ram-air principle to make high-speed areas with high pressure. When you drive fast, this pressure zone forces air into the engine of the car. So, it can give a power boost and make the engine have more horsepower.
Parts of a Cold Air Intake
Since every car has a different shape, their intakes will also be different. The main parts of most of them are the same, though. Getting to know how they work can help you find good parts when you’re shopping online.
The air filter is always the most important part of any intake system. This is where goes into the intake system before going through the assembly. Most of the time, you can find it in a plastic box in the engine bay. Keep an eye out for ones that are made of metal.
After you open the hood, look near the throttle valve assembly to find yours. If you’ve ever seen a vacuum filter, you can compare them. Dirt and other things can’t get into the engine because of the filter.
When air goes through a high-flow filter, it doesn’t meet as much resistance. Also, they’ll get rid of all the dirt so that your engine only gets pure oxygen.
The next big part of a cold air intake is the mass flow sensor. This keeps track of how much air gets into the engine when you’re driving.
If you look at most modern cars, you’ll find two kinds of mass flow sensors. A vane metre looks like a flap and responds to the weight of the air as it comes into the engine. The vane metre will move further back as more air comes in.
It measures this movement so that the ECU can change how much fuel it puts into the engine.
A hot wire system is the other kind of mass flow sensor. They work by measuring the resistance of an assembly of wires. As the temperature goes up, so does the resistance of the wire.
The last part of a cold air intake is the throttle body. You’ll find them holding a throttle plate behind the mass flow sensor.
When you press down on the car’s accelerator, this is what you open. When you push down on it, the plate moves up to let more air into the engine.
Types of Cold Air Intakes
A basic assembly won’t make much of a difference in how well the engine works. By using a straight pipe, they will reduce the amount of air resistance.
They can even make intakes with pressure zones that mix the temperature of the air. A lot of them move the filter so that it is now behind the bumper. When you move it away from the engine, it’s easier to cool the air.
Ram intakes utilise different principles to create positive pressure zones. So, they can increase the amount of flow going into the engine.
Many of them get bigger so they can let more water flow through without stopping it as much.
Is a Cold Air Intake Bad for Engine?
If you put in a cold air intake the right way, it won’t hurt your engine. In fact, they can make your engine last longer.
With a normal intake, not enough air gets in to burn all the fuel. So, because there isn’t enough oxygen, gunk gets left behind. Over time, this gunk can wear out parts of your engine by making them move against each other more.
Putting in a cold air intake can help the engine run better. Stock intakes limit the flow of air, which reduces horsepower. So, if you put one of them on your car, your engine won’t get as dirty.
You changed the car’s intake and made it run better. So, more of its fuel burns every time it’s in the chamber, which cuts down on gunk.
Do Cold Air Intakes Increase Horsepower?
When you install a cold air intake on an engine, you can be sure that the horsepower will go up. If you hook up the car to a dyno, you can see how it works. They will get an exact reading of a car’s horsepower.
If you measure how much power a car has before you change its intake, you’ll have a good starting point. Compare that to how much its power went up after the intake was changed.
Most of the time, upgrading to a cold air intake will give you a 10 HP boost. Some cars can get as much as a 30 HP boost if their intakes were too small before.
By upgrading its intake, you’ll get at least a 5 HP boost.
Do Cold Air Intakes Really Make a Difference?
Using good engineering, cold air intakes do make your engine more powerful. They are made to give off more oxygen so that your fuel burns completely. Because of this, if you put one of them on your car, it will have more power.
They have a few ways to increase the amount of oxygen that gets into the combustion chamber. Most of them lower resistance by making the space between the filter and the chamber smaller.
They also move the engine’s filter to a cooler place than where it was before.
When you lower the air’s temperature, it gets more dense. There are more oxygen molecules in a given volume of dense air than in a given volume of warm air.
Engineers might also make them use laminar flow to reduce air resistance. They have mostly made the air flow in parallel at that point. When the air moves this way, it moves much more smoothly.
Are Cold Air Intakes Worth It? (Cover Pros and Cons)
Depending on your engine, putting in a cold air intake may be a good idea. If your car has a small air intake, they can help in a lot of ways.
By replacing it, more air would be able to get into the system. Plus, it would have more oxygen when it got to the chamber where the fuel is burned.
If the intake made the flow rate faster, the horsepower of your car would also go up. If you increase the air flow enough, lowering the temperature of the air can give you up to 5% more horsepower.
If you’re thinking about getting a cold air intake, there aren’t many bad things about it. You’ll need enough space in your car to put one of them in. If not, the stock intake might not be able to be changed.
Another problem is how much they’ll make your engine run faster. Most of the time, replacing your car’s intake won’t make a big difference in its power.
Most of the time, the boost is limited by other parts. If the intake was changed, it might let in too much oxygen. So, you’d have to upgrade the car’s fuel injectors to make sure there’s enough fuel to make up for it.
How to Choose a Cold Air Intake
It’s not hard to find the right intake for your car. First, you’ll need to look at your owner’s manual. If you look at the back of the car, you can see what kind of intake it needs.
Then, you can search for options online to compare them. Most of the time, for a given make and model, you’ll only have a few choices.
Look for one that can use the ram-air method. By making a positive pressure zone at high speeds, these make more oxygen available. They can give your car more power than a cold air intake.
K&N makes a lot of cold air intakes, so it’s a good place to start looking. Many of them use their high-flow filters, which are new and different. If you buy one of them, you can also use one of their filters.
Don’t worry if you can’t find one that works like a ram air fan. You can still use one that can cool the air before it goes into your engine.
As long as it can do that, you’ll feel a power boost when you’re driving!
Do Cold Air Intakes Work for a Diesel?
If you want to change a diesel engine, you can use a cold air intake. Even more than regular engines, diesel engines often work better when they take in cold air.
If you put one of them on a diesel engine, it can even help you get better gas mileage while you’re driving. That means that if you change the engine’s intake, you’ll spend less at the gas station.
Another benefit of replacing it is that it will make the engine go faster. When you press down on the accelerator, you can let more oxygen into the chamber. So, after upgrading the intake, the engine will feel like it has more power.
The horsepower of the engine will also go up after you get a new intake. In some situations, they’ll add up to 12 HP to the horsepower.
Why You Should Consider a Cold Air Intake
Changing the intake on your car can make it run better and use less gas. They can get more oxygen into the combustion chamber, which makes the combustion process go better.
When fuels burn completely, they make more power than when some of them are left behind. So, they can help you do better!
Also, there won’t be as much dirt in the engine. This is because most of the fuel burns when the air coming in is cold. This can also boost your fuel economy since none of the fuel goes to waste.