When people talk about race cars or high-performance sports cars, the topic of turbochargers usually comes up. Turbochargers also appear on large diesel engines. A turbo can significantly boost an engine's horsepower without significantly increasing its weight, which is the huge benefit that makes turbos so popular!
In this article, we'll learn how a turbocharger increases the power output of an engine while surviving extreme operating conditions. We'll also learn how wastegates, ceramic turbine blades and ball bearings help turbochargers do their job even better. 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.
One of the surest ways to get more power out of an engine is to increase the amount of air and fuel that it can burn. One way to do this is to add cylinders or make the current cylinders bigger. Sometimes these changes may not be feasible -- a turbo can be a simpler, more compact way to add power, especially for an aftermarket accessory.
� T��urboc�hargers allow an engine to burn more fuel and air by packing more into the existing c�ylinders. The typical boost provided by a turbocharger 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. It's not perfectly efficient, so you might get a 30- to 40-percent improvement instead.
�One cause of the inefficiency comes from the fact that the power to spin the turbine is not free. Having a turbine in the exhaust flow increases the restriction in the exhaust. This means that on the exhaust stroke, 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.
Inside a Turbocharger
The turbocharger is bolted to the exhaust manifold of the engine. The exhaust from the cylinders spins the turbine, which works like a gas turbine engine. The turbine is connected by a shaft to the compressor, which is located between the air filter and the intake manifold. The compressor pressurizes the air going into the pistons.
The exhaust from the cylinders passes through the turbine blades, causing the turbine to spin. The more exhaust that goes through the blades, the faster they spin.
On the other end of the shaft that the turbine is attached to, the compressor pumps air into the cylinders. The compressor is a type of centrifugal pump -- it draws air in at the center of its blades and flings it outward as it spins.
In order to handle speeds of up to 150,000 rpm, the turbine shaft has to be supported very carefully. Most bearings would explode at speeds like this, so most turbochargers use a fluid bearing. This type of bearing supports the shaft on a thin layer of oil that is constantly pumped around the shaft. This serves two purposes: It cools the shaft and some of the other turbocharger parts, and it allows the shaft to spin without much friction.
There are many tradeoffs involved in designing a turbocharger for an engine. In the next section, we'll look at some of these compromises and see how they affect performance.
TRY OUR FAKE TURBO WHISTLER!
Make your car sound like it has a turbocharger under the hood
Make your car sound like a turbo charger! Attach our turbo whistler to your muffler exhaust pipe and under heavy acceleration makes your car sound like a fake turbo charger.
The turbo whistler is an aluminum device which easily fits inside your car or trucks muffler exhaust pipe. Under heavy acceleration makes your car sound like it has a fake turbocharger. In some cars letting off the gas pedal releases backpressure in the muffler making the car sound like it has a small blow off valve. All your friends will think you have a turbocharger under your hood!
TURBO WHISTLER WORKS ON ALL CARS!
The best part about our turbo whistler is that it only takes seconds to attach. No welding or drilling needed. You can easily detach the exhaust whistler and hear the turbo sound on all your friend's cars!
The turbo whistler measures about 3" long and is made of lightweight aluminum.
"I love my Turbo Whistler! Perfect Honda Civic turbo sound. I also tried it on all my friend's cars!"
- Gary Matthews
"After revving my car with the Turbo Whistler, my friends were curious what I had under my hood!"
- Chris Peterson
"I drive a cheap Honda Accord, but the Turbo Whistler makes it sound like I have a supercharger now!"
- Sara Dudash
FAKE TURBO WHISTLER INSTALLS IN SECONDS!
CLICK HERE FOR TURBO WHISTLER VIDEOS
Fake Turbo Whistler installs in seconds! Turbo Whistle simply clamps to muffler exhaust pipe!
We also accept orders through PayPal below
All major credit cards and PayPal accepted
Your turbo whistler will be shipped same day ordered by USPS Mail with tracking number
Please allow around 3-5 days for delivery
Wholesale Orders - Link to Us - Video Contest - How to Install Turbo - Street Racing Videos - Drag Racing Videos - Sportbike Racing Videos - Drifting Videos - Burnout Videos - Car Makes Models - Car Clubs - Car Racing Videos - Auto Racing Videos - Formula 1 Racing Videos - Off Road Racing - Go Kart Racing - Car Crash Videos - NASCAR Racing - Muffler Exhaust Systems - How Turbo Works - Turbocharger Videos - Supercharger Videos - Exotic Cars - Dyno Videos - Demolition Derby - Indy Racing - Monster Trucks - Speedways - NASCAR Drivers - Concept Cars - Import Tuner Cars - Turbo Sound - How Turbochargers Work - How Superchargers Work - Car Shows - How Nitrous Oxide Works
Now you know how a turbocharger works in a car