Naturally Aspirated Motors VS Forced Induction

There is often large debate about whether naturally aspirated engines are better than forced induction. Quite honestly, I feel both of these have their own associated pros and cons, leaving it all up to user preference.

Natural Aspiration

Lets start with the benefits of naturally aspirated motors, as well as the negative sides of it. There is often a saying when it comes to motors, “you can’t replace displacement”. The meaning behind this is that you could definitely go ahead with turbo charging or even super charging a motor, but in the end a higher displacement motor is much more efficient than forced induction. Obviously, however, if you have a 4 cylinder motor with 2 liters of displacement, there isn’t much you can do with that to receive insane power gains and remaining naturally aspirated at the same time. Often times people roll with putting a turbocharger on their inline 4 cylinder motors to receive the gains equivalent to a v8.

Upgrades

Now, whose to say that you cant have the best of both worlds? The great thing about most large displacement motors is this, you can upgrade them through the roof to get the power that you want without even having to add forced induction to it. Now, with all sorts of performance parts installed on the motor to give it more power also means that it can handle a turbocharger or a supercharger much better than if it was bone stock. This is where you see motors reach anywhere to 500 horsepower or more, some cars even have so much power, the engine  blocks split.

How It Works

Now on to the good stuff, how forced induction works. Engines normally work by taking in air, compressing it within the engine, mixing it with fuel, and adding a spark. Now, the more compression that the air receives means that more air can be fit inside a cylinder. More air equals a larger boom, a larger boom equals more power. Which is exactly what superchargers and turbochargers do, they compress the air that goes into the engine to extreme lengths. There are difference between turbochargers and superchargers, though. Superchargers are belt driven, and offer instant power whenever you need it. Turbochargers take the exhaust gases and compresses them to send into your engine, Turbochargers create massive amounts of heat and can damage components if not cooled right, so they are often fitted with an inter cooler to keep things from becoming damaged. Turbochargers are more efficient for fuel, because they do not add power until higher RPM’s. This is also called turbo lag, because a Turbo does not spool up in the lower RPM ranges. Superchargers often use more fuel to run because they are sapping energy from the motor because of the belt and pulley, this is also why Turbos generate more power due to them not sapping the motor for energy.

 

Forced induction is a great choice for anyone looking to get massive power gains with little work, but be careful, not all engines can handle the pressure that these devices create. Come see us if you ever need to have one of these devices fitted and installed, contact us below.

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