various types of supercharges

[burnz]

what are the names (type of supercharges)
we know what a roots type is, (6/71, 12/10, 14/10, b&m, littlefield)
screw type (whipple, keen bell)

but what type are these: raptor, vortex, sprintex, capa,...yes they are a hybread belt driven turbo.
but what is the single name?? (roots, screw, insert type.)

could they be called a "vane" type?

i would allso like to hear raptor thought's on this aswell on what they prefer to call their own product.

[soop]

Basically, a supercharger that sits in the valey of the engine is going to be a positive displacement supercharger.

The turbo looking deals are centrifugal.

IIRC anyway.

[Wagon_Wheel]

The raptor and vortech type supercharges are side mount and are known as centrifugal type super chargers
Edit, ooppss you beat me to it lol

[Torquative]

yes they are a hybread belt driven turbo

we learnt that the exciting way ay Chris ...

[VT-565]

There are only a handful of popular 'types' of superchargers today, there have been a few come and go over time, simply because as the technology of engines moves forward, they (the superchargers) are shown to be inefficient. Vane type is the first one that springs to mind. As an air pump, it is not very efficient in an automotive situation, as it relies on the vanes sealing against the elliptical housing to seal and provide a positive pressure.

Another thing is too, just because a supercharger sits in the valley, doesn't mean it is a certain type, it may just be the most common way of mounting it.

They break down into two basic groups, centrifugal and positive displacement.

Centrifugals come from your guys like Raptor, ProCharger, Vortech, Powerdyne, Paxton, Rotrex etc...
They use an impeller driven through a step up ratio (either gear or belt driven, but in the rotrex's case, something entirely different again)..
The harder this impeller spins, the more boost it makes, but they do have efficiency zones, plotted on compressor maps just like turbos do.
They do not put out a fixed amount of air per revolution, they rely on rpm to gain their efficiency.

Positive displacement chargers come from people like Yella Terra, Harrop (agent for Eaton), Whipple, PSI etc...

They have a case which encloses a mated pair of rotors, either screws, male & female lobes so on and so forth...

The displace a fixed amount of air every rotation, a lot of these blowers are rated by a litreage, eg. a whipple 4.2litre, which denotes how much air it will move every rotation. These blowers are very good at lower rpm compared to the centrifugals, some will argue the point, but on paper, its true.

There are a lot of other things to go on about, but that's a basic rundown.
I'm not even going to venture into which is better, because they all have their Pros & Cons.

[radarak47]

Very nice description there mate.

No arguments about the lower torque of the PD style