# How is supercharger displacement calculated?

## How is supercharger displacement calculated?

In terms of sizing, it all comes down to the volume of air that the supercharger can cram into the cylinders of the engine each time the supercharger spins around. The ratings for superchargers are therefore given in L/rev (litres per revolution) or cc/rev (cubic inches per revolution).

How many liters is a 8-71 blower?

An 8-71 put out 568 CID of air per revolution (8 * 71 = 568)…

How many L does a V8 supercharge carry?

The 6.2-liter V8 Supercharged LS9 was produced by General Motors for use in high-performance vehicles, and is still available as a crate engine offering from Chevrolet Performance.

### How many cubic inches is a 6-71 blower?

Weiand superchargers(who produce GMC style roots superchargers obviously) says that their 6-71 moves 411 cubic inches of air per revolution, which is actually pretty close to the 426cu in that you would get doing the above math, but they say their 8-71 moves 436cu in, which is a long way from the 568cu in you would get …

Do superchargers increase displacement?

The reason that larger displacement engines make more power and torque than smaller ones is that more fuel and air are available for combustion. As a result of supercharging, a small displacement supercharged engine can produce similar horsepower and torque to a naturally aspirated larger displacement engine.

How much boost can a 8-71 blower make?

Weiand Pro-Street 6-71 and 8-71 supercharger kits come with drive ratios that will typically produce 5 to 7 pounds of boost. These boost levels are based on 350 or 454 cid engines.

## How many liters is a 14 71 supercharger?

GMC 71 Series Diesel Models

Model Displacement Liters Horsepower
8V-71 9.3L 318
12V-71 14.0L 450
16V-71 18.6L 480
24V-71 27.9L 1800

How does a 6-71 blower work?

The 71-series has been produced in versions of one to 24 cylinders, and each one has a blower (or blowers) of appropriate size. Here the blower does not serve as a supercharger but simply as an air pump. Since the 71 series is a two-stroke, the blower is used to pull in fresh air and push out the spent exhaust gas.

What kind of superchargers are used in drag racing?

The supercharger has been a staple in drag racing since the sport began, from the first hot rods on the salt flats to the beginnings of Top Fuel racing. The two most common types of superchargers in drag racing are the roots and screw blowers that can be seen sticking out of the hoods of different racecars in venues around the world.

### Which is more expensive a roots or screw supercharger?

These rotors require an extremely high degree of tolerance and, as a result, the screw type supercharger is more expensive than a Roots. The Roots blower is the simplest of all blowers and therefore is also the least expensive. A Roots blower does not compress the air inside the supercharger.

What happens to the carburetor when you Supercharge an engine?

As a result of supercharging, a small displacement supercharged engine can produce similar horsepower and torque to a naturally aspirated larger displacement engine. With a Roots blower, the carburetor functions basically the same as it would on an unblown engine, except it now sits on top of the supercharger.

What should compression ratio be for Weiand superchargers?

As a basic rule of thumb, the 5 to 8 pound boost range that is provided by the standard pulleys supplied in Weiand’s supercharger kits is suitable for compression ratios in the 8 to 9:1 range when used with 92 octane gasoline. If your compression ratio is higher than this, you will have to run less boost.