There are some here that are unfamiliar with what a forced induction system is and how it works.
We will talk a bit about the two kinds of forced induction and how they compress the air flowing into the engine. Superchargers and Turbochargers is what I am talking about and we will go through it at a fith grade level so more people like me can understand it.

The advantage of compressing the air is that it stuffs more air into each cylinder. More air means that more fuel can be burned at a higher rate so you get more power from each explosion in each cylinder. A turbo/supercharged engine produces more power overall than the same engine without the BOOST.

The typical boost provided by either a turbocharger or a supercharger is 6 to 8 pounds per square inch (psi). Since normal atmospheric pressure is 14.7 psi at sea level, you can see that you are getting about 50-percent more air into the engine. Therefore, you would expect to get 50-percent more power. Although that does not always stand true your numbers will be close, so you might get a 30-percent to 40-percent improvement instead.

There are big dofferences between a turbo setup and a super setup.


Here we will discuss the two kinds of boosts, the way they work and the differences between them.

Although the goal of producing a buttload of HP is the same between both Superboosting and Turboboosting the way they go about doing it is totally different.
Something has to supply the power to run the air compressor.
In order to achieve boost in a turbcharger, it uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump.
The exhaust from the cylinders pass through the turbine blades, causing the turbine to spin. The more exhaust that goes through the blades, the faster they spin. Pretty simple. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high.
Hot air is a bad thing. Even with a non boosted engine, you always want the cool air. Thats why just about everybody ahs a Volant CAI in their Titans. This hot *** air is cooled by an external air cooler usually mounted in the front of the vehicle behind the grill or front spoiler thingy.
An intercooler or charge air cooler is an additional component that looks kinda like a radiator, except air passes through the inside as well as the outside of the intercooler. The intake air passes through sealed tubes inside the cooler, while cooler air from outside is blown across fins by the engine cooling fan or electric fan......or just from air passing through it form going really fast.

Cool air has alot more "air" than hot air does. The intercooler increases the power of the engine by cooling the pressurized air coming out of the compressor before it goes into the engine. This means that if the turbocharger is operating at a boost of 7 psi, the intercooled system will put in 7 psi of cooler air, which is denser and contains more air molecules than hot air. COOL AIR MEANS MORE POWER.

As said before the power increase should be about 50% but here is usually where it is lost. The loss comes from having a turbine in the exhaust flow increasing the restriction in the exhaust. This means that the engine has to push against a higher back-pressure. This subtracts a little bit of power from the cylinders that are firing at the same time.
I found a good pic that shows a turbo setup pretty good.




Superchargers: A supercharger is connected directly to the crankshaft by a belt unlike a turbocharger which is driven by exhaust gases. A supercharger provides improved horsepower and torque, at lower engine rpm's, by pumping extra air into the engine in direct relationship to crankshaft speed. The positive connection yields instant response, in contrast to turbochargers, which must overcome inertia and spin up to speed as the flow of exhaust gas increases.

There are two kinds of superboosters as well. There are internal compression and external compression superchargers. An internal is called a cintrifugal supercharger and an extenal compression charger is called a roots supercharger.

An Internal Compresssion Supercharger actually compresses the air inside the supercharger. It functions like an air compressor. The cintrifugal supercharger is an internal compression supercharger. External compression blowers are just air pumps. It pumps air into the manifold and cylinders and the actual air compression takes place there.
cintrifugal blowers do not heat up the inlet charge as much as roots blowers do. A cooler intake charge means a denser volume of air per pound of boost goes into the engine which produces more power.
Just because you have more Psi doesn't mean you have more power. Cooler air has more"air" than hot air does.
You can have two blowers that both may produce 7 pounds of boost but the cintrifugal blower making 7 psi of boost is going to make substantially more power than a roots blower making seemingly the same 7 psi of boost. Even though the pressure is the same there is less air in the charge coming from the roots blower.
I attached a couple pics of roots and cintrifugal blowers too
ROOTS:

Cintrifigul:





Both turbos and supers would be a great addition to our Titans. The can increase not only power but fuel efficiency too. As of right now, unless you wanted to go all out custom on your Titan they are only making a supercharger for it. Just one. Stillen to be exact.


I hope I covered most of any questions you had about forced induction.