Superchargers

[GTR Dreamer]

what does a super charger look like?
where abouts is it mounted?

[bk4uyeah]

here's a pretty good example, sry bout the bad paint circle

[MrVette83]

The one illustrated by bk4uyeah is what is known as a centrifugal supercharger. There is also what is known as a roots type supercharger which is most commonly seen drag cars and it is located on the very top of the engine. Driven by a belt by the way.

[Egg Nog]

http://www.superchargersonline.com is the best source for information about this on the 'net. I copied, edited, and formatted one of their articles here so that you could read it easier. All credit goes to them.


Centrifugal Supercharging compresses the air inside the case of the supercharger using an impeller. Then, discharges the air out of a scroll to the motor. This design is similar to turbo-charging except for centrifugal superchargers don't use the exhaust to build pressure, they use a belt, driven by the crank pulley to spin the impeller. Centrifugal supercharging is definitely one of the more user-friendly ways to supercharge your motor. The ability to change the impeller sizes and to spin the impeller at different speeds creates a more inexpensive way to have flexibility in your power curve. Centrifugal superchargers have become the standard for street use and light-duty racing and far outsell all other types of superchargers.


Recommended Usage:
Street Use - Commercial Use - Road Racing - Drag Racing

Positive Points:
1) Lots of Flexibility for Power Adjustments
2) Lower Discharge Temperatures
3) Great Reliability
4) Easy to install

Negative Points:
1) Not as much power at low RPMs as Roots or Screw type superchargers

Manufacturer Availability:
Paxton - Powerdyne - ProCharger - Vortech



The Roots Type Supercharger is the first style supercharger that was ever used and can be dated back to the 1880s when the Roots brothers designed it as an air conveyor for mine shafts. Roots blowers act like air pumps (not compressors), and In general, Roots blowers have a two or three lobe rotor design, depending on the size of the case. Roots blowers will give you positive pressure to your motor from just a crack of the throttle, and will give all that they have to offer at full throttle no matter what the rpm of the motor. Roots Type Superchargers may look awesome hanging out of the hood and are great for those looking for drastic power increases at lower RPMs. Roots blowers are also extremely reliable and require very little maintenance, which is why Ford, GM, Mercedes, Jaguar, and Austin Martin have all featured Roots blowers as original equipment on select high performance vehicles.


Recommended Usage:
Street Use - Towing - Extreme Drag Racing - Show Vehicles

Positive Points:
1) Boost throughout the entire RPM range, right off of idle
2) Highest Potential for Gain (A must-have for all-out drag racing)
3) Great Appearance & Stature (Most common supercharger type for show vehicles)

Negative Points:
1) Sometimes Violent Throttle Response
2) Lower boost ratings at higher RPMs
3) Higher Than Normal Discharge Temperatures
4) Lengthy installation times

Manufacturer Availability:
B&M - BDS - Eaton - Holley - Littlefield - Mooneyham - Weiand



Screw type superchargers are derived from the Roots type concept but with vast improvements for street use. Although from the out side, screw type superchargers may look a lot like Roots type superchargers, on the inside you will find a twin-screw design that compresses air unlike Roots type superchargers which pump the air into the motor. Screw type superchargers have an axial-flow design that compresses the air as it moves between the screws to create positive pressure without creating the heat that Roots type superchargers can create. The Screw type supercharger's ability to produce a dramatic increase of power from idle and through out the rest of the power curve make them a great choice for heavy vehicles, towing or commercial use.


Recommended Usage:
Street Use - Towing - Road Racing - Drag Racing

Positive Points:
1) Great Power at Low RPMs (Great for Towing)
2) Lower Discharge Temperatures
3) Factory Fit & Appearance
4) Great Reliability

Negative Points:
1) The Power Doesn't Keep Climbing in the High RPMs (Power curve is very flat)
2) Challenging To Achieve High Boost Levels or CFMs
3) Lengthy installation times

Manufacturer Availability:
Kenne Belle - Magna Charger - Whipple


The last picture is an example of dual centrifugal superchargers on a Viper V10.

[GTR Dreamer]

wow thanks.
heaps of credit 2 u aswell.

[GTR Dreamer]

sooo........
because they have a lower discharge temperature does that mean that an intercooler wouldnt be needed?

[DiabloVT]

nope, intercoolers are for turbocharged engines my friend

[Egg Nog]

Intercoolers are not necessarily needed at all... Very simply put, most intercoolers act like a radiator for the high-pressure intake air to cool it down. The colder the air is, the more gas molecules you can fit into it, and thus, intercoolers actually add power.

[NoOne]

Colder air is denser giving a stronger charge upon ignition, and from my understanding atomizes much better giving a more uniform combustion.

[GTR Dreamer]

yea.
i read thatin the turbo chargers section at howstuffworks.com great site that

[GTR Dreamer]

i spose they still have BOV's do they?

[werty]

here try this link for toyota superchargers


www.trdusa.com