Im trying to learn more about superchargers since I know nothing of and I was wondering if someone could tell me the difference between how each works and how they looked like (pictures would be nice ). I tried looking for pictures and explanations but most of the pictures are mixed and most superchargers are just put together in a group.

P.S. Just in case people people ask, no Im not thinking about supercharging my car, and I thought this place was the most appropiate, and the reason I posted this thread was to get educated in something I know nothing of. btw i searched already. thx in advanced for your time.

 

haha Well I found a few answers to my question about some superchargers If anyone cares. Keep in mind that this was not in my own words, This i found in an encyclopedia.

Centrifugal Details:

A centrifugal supercharger utilizes an impeller spun by a drive pulley to compress air then discharges it through a scroll type housing to the engine. The high impeller speeds are produced by internally overdriving the input shaft, which is overdriven by the external drive pulley on the supercharger. As the supercharger draws in air, an internal rotating impeller compresses it and then it is forced out through the scroll of the supercharger. The scroll collects the compressed air forcing it into the discharge tube in which it is forced into the engines air intake.
Recommended Usage:
Street/Strip – Road/Drag Racing – Commercial
Pros:
• Centrifugal superchargers cost is typically less.
• Centrifugal superchargers are the fastest and simplest to install.
• Centrifugal superchargers create lower discharge temperatures which lead to greater reliability and performance.
Cons:
• Centrifugal superchargers do not produce as much boost in the lower rpm range.

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Roots Type Details:

A root type supercharger draws in air in which it is passed through intermeshing rotors, unlike the use of an impeller in a centrifugal supercharger. The air is collected in the area between the lobes and is compressed into the manifold to create boost. The Roots type supercharger is basically an air pump that compresses the air charge in the intake manifold and cylinders. Typically, root type superchargers have a two or three lobe rotor design, depending on the size of the case. Like a centrifugal supercharger, the charger is driven directly from the crankshaft via the use of a belt. The root type supercharger is the oldest to date, dating back to the 1880s when the Roots brothers designed it as an air conveyor for mine shafts.
Recommended Usage:
Extreme Drag/Street Racing - Towing
Pros:
• Root type superchargers deliver boost through the entire rpm range.
• Root type superchargers are capable of producing higher boost levels.
Cons:
• Root type superchargers produce hotter discharge temperatures.
• Installation is longer and more complicated.


Screw Type Details:

The screw type supercharger is the predecessor of the roots type. Though the internal design of the charger is similar to the roots, the screw type exhibits internal compression. As air is passed through the supercharger, the pocket of air between the internal screws decrease in size towards the outlet. This increases the thermal efficiency beyond that of a roots type supercharger.
Recommended Usage:
Towing - Extreme Drag/Street Racing
Pros:
• Screw type superchargers produce high boost levels in the lower rpm range.
• Screw type superchargers are great for towing or hauling heavy loads.
• Screw type superchargers run cooler than roots type.
Cons:
• The power curve tends to be flat.
• The installation is longer and more complicated

 

I also found a few more detailed explanations about each type of supercharger

Roots type in detail
http://www.superchargersonline...id=22

Screw type in detail
http://www.superchargersonline...id=20

still havent found anything on centrifugal type.