the diffrences kind of long...
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From: Fort Wayne, Indiana
the diffrences kind of long...
ok this is kind of long but may answer alot of questions some people may have to the diffrences between supercharging and turbo charging. also explans the differences between roots,srew, and centrifugal superchargers. for those who want to know this is a paper for my engine performance 3 class i'm taking at my college.
maybe this could be a stickey?
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Ever since the first motor was made, people where amazed at the type of power they put out. But ever since the first car hit the production floor people have been setting out to find ways to make there seemingly stock vehicles, real power plants, by supercharging, turbo charging, and even by Twin screw charging but that’s getting ahead of things.
The main differences between supercharging, and turbo charging is how the device is spun, or driven. In theory a turbocharger is more efficient due to the fact that it uses exhaust gas (a waste or by product of the motor) to spin the turbine to compress air into the intake, and from there mixing with the gas and making its way into the compression chamber. Superchargers use a belt off of the engine such as a alternator would or a power steering pump, and adding another system the engine has to drive, kind of robbing horse power to make it, What an oxymoron. Turbo charging is probably the more popular of the two due to its low cost, and great power outputs, but Both superchargers and turbo chargers work off of the same concepts. Air is forced into the motor to increase the amount of air, AND fuel into the compression chamber thus making more power than a natural aspirated motor of the same kind would. But when adding air you must increase the amount of fuel that is delivered to the combustion chamber so that you do not create lean conditions, go over injector duty cycle, and many times you must run higher octane so that you do not have detonation problems. Often mistaken 93 octane is actually harder to burn than 81 octane is. You must use this type of fuel whenever you up the compression ratio, or run a turbo charging system, or supercharging system.
Superchargers have been out for a long time and today there are three main designs that are on the market, Roots, Screw, and centrifugal. Roots, the oldest design was first put on a motor in 1900. The easiest way to explain the operation is to say that two screws run next to each other and force air into the intake and pulling air from the opposite side or the atmosphere. The Twin-screw type supercharger is like the roots, but it compresses the air inside of the supercharger housing. Twin Screw superchargers make more noise due to the air being compressed into the intake, often making a whine, or whistle. Screw supercharger tends to be more expensive due to the precision machining that has to be done. The centrifugal supercharger is most like a turbo but does not use exhaust to spin the turbine but still uses the belt system of the vehicle to spin the turbine. The shape and basic design would resemble a turbo but it would happen to have a pulley on the back end of the housing. This design is very efficient as the turbine can reach up to 60,000 RPM.
When compressing air into anything you will create heat. Look at it this way, the more air you push in (PSI), the higher intake temperatures you’re going to make. When you compress the air you agitate the air molecules and in turn they get hot. There are some ways around this, such as intercooling, advanced heat exchangers for the supercharger coolant, methanol injection, intercooler co2 bars; the list honestly goes on and on. But anyway you look at it, either option has its ups and its downs. It really all depends on the application and its intended use. If your looking for instant boost, and don’t mind loosing a few horses to gain a few, well then supercharging is your calling. But if you want great efficiency, good boost levels and don’t mind the spooling well then turbo charging is what you need. In the end both are great ways to make some serious power and turn some heads. Just making the right decision on what you need lies in your hands. But whatever you do I’m sure you wont be disappointed.
maybe this could be a stickey?
-----------------------------------------------------------------------------------------------------
Ever since the first motor was made, people where amazed at the type of power they put out. But ever since the first car hit the production floor people have been setting out to find ways to make there seemingly stock vehicles, real power plants, by supercharging, turbo charging, and even by Twin screw charging but that’s getting ahead of things.
The main differences between supercharging, and turbo charging is how the device is spun, or driven. In theory a turbocharger is more efficient due to the fact that it uses exhaust gas (a waste or by product of the motor) to spin the turbine to compress air into the intake, and from there mixing with the gas and making its way into the compression chamber. Superchargers use a belt off of the engine such as a alternator would or a power steering pump, and adding another system the engine has to drive, kind of robbing horse power to make it, What an oxymoron. Turbo charging is probably the more popular of the two due to its low cost, and great power outputs, but Both superchargers and turbo chargers work off of the same concepts. Air is forced into the motor to increase the amount of air, AND fuel into the compression chamber thus making more power than a natural aspirated motor of the same kind would. But when adding air you must increase the amount of fuel that is delivered to the combustion chamber so that you do not create lean conditions, go over injector duty cycle, and many times you must run higher octane so that you do not have detonation problems. Often mistaken 93 octane is actually harder to burn than 81 octane is. You must use this type of fuel whenever you up the compression ratio, or run a turbo charging system, or supercharging system.
Superchargers have been out for a long time and today there are three main designs that are on the market, Roots, Screw, and centrifugal. Roots, the oldest design was first put on a motor in 1900. The easiest way to explain the operation is to say that two screws run next to each other and force air into the intake and pulling air from the opposite side or the atmosphere. The Twin-screw type supercharger is like the roots, but it compresses the air inside of the supercharger housing. Twin Screw superchargers make more noise due to the air being compressed into the intake, often making a whine, or whistle. Screw supercharger tends to be more expensive due to the precision machining that has to be done. The centrifugal supercharger is most like a turbo but does not use exhaust to spin the turbine but still uses the belt system of the vehicle to spin the turbine. The shape and basic design would resemble a turbo but it would happen to have a pulley on the back end of the housing. This design is very efficient as the turbine can reach up to 60,000 RPM.
When compressing air into anything you will create heat. Look at it this way, the more air you push in (PSI), the higher intake temperatures you’re going to make. When you compress the air you agitate the air molecules and in turn they get hot. There are some ways around this, such as intercooling, advanced heat exchangers for the supercharger coolant, methanol injection, intercooler co2 bars; the list honestly goes on and on. But anyway you look at it, either option has its ups and its downs. It really all depends on the application and its intended use. If your looking for instant boost, and don’t mind loosing a few horses to gain a few, well then supercharging is your calling. But if you want great efficiency, good boost levels and don’t mind the spooling well then turbo charging is what you need. In the end both are great ways to make some serious power and turn some heads. Just making the right decision on what you need lies in your hands. But whatever you do I’m sure you wont be disappointed.
Thread Starter
Senior Member
Joined: 11-06-06
Posts: 1,355
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From: Fort Wayne, Indiana
lol sorry i know its long but honestly this might help some people out. just taking the time to read this may help stop alot of questions. also this is a term paper i hade to do... kinda stupied i hade to write a paper in one of my last automotive clases
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