Exhaust gases pass through the turbine section and the energy of the hot, high pressure, fast moving exhaust spins the turbine wheel. This wheel is connected to one end of a shaft, at the other end is the compressor wheel. The compressor wheel is fed air at room temperature and pressure. The compressor compresses the ambient air to a higher temperature and pressure, the "boost pressure." This pressurized air flows through an intercooler to lower the temperature (and pressure) of the pressurized air. The pressurized air enters the intake tract of the engine, is mixed with fuel and combusted.

You can find a TON of information on the web. Just search for "turbocharger."

 

Before you get flamed or anything about using the search or anything, here is a really good link I found that will explain it all for ya. Just go through with the next page link at the bottom to keep going, it will answer it all for ya.

http://auto.howstuffworks.com/turbo1.htm

 

jhow stuff works will explain all and everything u need to know, great website

basically turbocharger is nothing more than a shaft with 2 fans on it, sepereated by their seperate chambers,

one side is fed exhaust air from the engine combustion chamber on the exhaust stroke, and the exhaust propels the blade, thereby spinning the shaft its connected on, and there fore spinning the other side which sucks in fresh air from the outside. this goes to the engine intake tract.

psi, is pounds per square inch...just that. more pounds equals more air.

so the greater the pounds the greater the amount of air u have in the engine and the more fuel u can burn, which leads to more power

 

now what about BB turbos and the others? I've heard that it's just better to have BB but i never found out why.

 

Turbochargers are a type of forced induction system. They compress the air flowing into the engine (see How Car Engines Work for a description of airflow in a normal engine). The advantage of compressing the air is that it lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. A turbocharged engine produces more power overall than the same engine without the charging. This can significantly improve the power-to-weight ratio for the engine (see How Horsepower Works for details).
In order to achieve this boost, the turbocharger uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump. The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) -- that's about 30 times faster than most car engines can go. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high.



everyone's got to know somehow

 

Here is a link about the ball bearing turbos TwinDragon. To my knowledge I thought the ball bearing turbos are basically just a different build for the center of the turbo. It is stronger, more durable and can make a turbo spool faster.

http://www.turbomagazine.com/tech/0405tur_turbotech/

 

Interesting stuff. So that is why the turbos are usually needing to be replaced at around 60k. How do you tell the turbos are worn out and in need of replacement? No more boost?

 

usually they blow out a seal.. make noise or seize up. There are lots of symptoms. You have to just go through each one.