ROTREX supercharger kits from G-Tech  

Priser oppgis kun i Euro 

List prices supercharger kits and superchargers: 

 

List of Kit for cars and Prices Export Click here

 

Superchargers and equipment for installations

 

  For small to medium engines a 50% increase in BHP and a 40% increase in torque compared to the original engine should be expected.

For larger engines a maximum increase in BHP of 100 is normal.

 

 

The above prices are exclusive delivery costs

 

 Performance charts will follow within the next months. But one should at least expect a 50% increase in horsepower and 40% increase in torque compared to 

the original engine.

 

 

 

   

 

Model

A [mm]

B [mm*]

C [mm]

D [mm]

E [mm]

Weight [kg]

Engine sizes

S/30-64

176

60-100

20

28

60

4.4

1.1-2.0 L

S/30-84

176

60-100

20

28

A60/76

4.4

1.8-3.0 L

S/30-104

190

60-100

20

33

80

5.0

2.8-4.5 L

The ROTREX® Supercharger System

The G-TECH ROTREX supercharger leveraged the high efficiency from a standard turbocharger compressor with a unique patented gear drive. 

The gear drive is in its base a planetary gear with a similar function as seen in a ball bearing. 

To lubricate this gear drive on internal combustion engines, G-TECH ROTREX uses a small amount of oil from the engine oil gallery, 

or alternatively the power steering or automatic transmission fluid. The lubrication requirements are very flexible, but required.

 Should the application restrain external lubrication, a self contained, in-house developed system with an oil reservoir and oil pump is

 implemented. 


The oil seal is leak proof, so there are no risks of contamination on the pressure side of the ROTREX® supercharger.

The ROTREX® supercharger systems consist of:

  • The ROTREX® supercharger
  • Oil supply from engine, transmission, power steering or oil reservoir with internal oil pump
  • Piping
  • Oil cooler.

BPH and Torque Increase from this supercharger

In most applications, the increase in horsepower when fitting a  supercharger is around 50 % and the normal increase in torque is around 40 %. 

Specific applications such as the VW Polo 75 BHP 4-cylinder engine have an increase in horsepower of 88 % and 44 % increase in torque.

Example: ROTREX Supercharged VW Golf Mark 4 1.8 L
Abow you find an example of a ROTREX supercharged vehicle. The new Golf Mark 4 with a 1.8 L engine has an incredible increase.

 

Turbochargers

Traditional Superchargers

Efficiency

High efficiency

Low efficiency

Noise

No noise

Most are noisy. Noise can to a certain extent be reduced at extensive costs.

Heat

Extreme heat is created. This demands special parts, extra cooling and carefull shielding.

Insignificant

Driveability

Turbo lag

Direct linkage between engine output and operator demand

Size & Weight

The turbocharger system is large and heavy, due to the solution of the heat problem.

Most traditional supercharger systems are large and heavy, when optimized for efficiency and noise.

Fuel economy

Significant better fuel economy per horsepower than naturally aspired.

Significant better fuel economy per horsepower than naturally aspired.

Emissions

Increases the emission of NOx.
Due to heat inertia, emissions are increased during cold start.
Difficulties with isolating exhaust piping. Heat loss affects the effectiveness of the catalytic converter.
The prevailing emission standards, set forth among others by EU, to be enforced in year 2005, are to be measured during cold starts. Turbocharging as it is used today, can not meet these standards.

Decreases emissions, also during cold starts.

 

 

 

The G-Tech Rotrex Supercharger

Efficiency

High efficiency. The Rotrex supercharger uses a very efficient high speed gear drive to create air flow by use of centrifugal turbo technology.

Noise

No noise. The patented high speed gear drive itself is silent like the turbo technology.

Heat

Insignificant.

Driveability

Direct linkage between engine output and operator demand. The Rotrex supercharger is driven directly from the crankshaft.

Size & Weight

Small and Light; complete system weights less than 10 kg.

Fuel economy

Significant better fuel economy per horsepower than naturally aspired.

Emissions

Decreases emissions due to better fuel economy and smaller engine size, also during cold starts.

 

Technical Information

The Heart of this Supercharger is the High Speed Gear Technology

The ROTREX® supercharger leverages standard turbocharger components for the compressor side via the support of very high RPMs by the the 

high speed gear drive deployed in the ROTREX® supercharger. The compressor side has been acquired from a range of different turbo charger 

manufacturers or highly optimized in-house designs.

As seen on the drawing below, the planetary gear consists of three main parts. The annulus, the rollers and the impeller axis. The three rollers hold 

the annulus with an internal gear ratio of 2,236:1 (90.08/40,29 mm) and the rollers again holds the impeller axis with an internal gear ratio of 4,241:1 (40,29/9,50 mm). 

This gives a total internal gear ratio of 9,483:1.
To hold the annulus, rollers and impeller axis together, a back plate and support plate are used. The rollers are kept in place with ball bearings mounted to these plates.


The rest of the supercharger consists of a drive plate, a gearbox housing and a seal. A pulley is positioned on one side of the gearbox, and on the other side 

of the gearbox is placed a specially designed high-speed seal, the impeller and the compressor housing.

Drawing of ROTREX® gearbox seen from the side with annulus, rollers and impeller axis.

 

How Does The ROTREX® Internal Step Up Gearbox Work?

The gearbox is a fixed ratio traction roller transmission, which has a built in capability to adjust contact forces applied to the traction surfaces of the transmission in 

relation to the force required. Traction roller transmissions require relatively large engagement forces between their traction surfaces to prevent slippage.

The ROTREX® automatically adjusts the contact force, to optimize the gear for those applications where the transmission transmits less torque, the amount of frictional 

losses and wear is reduced. Where full torque is transmitted, the transmission has the capability to provide sufficient traction force to prevent slippage.

Drawing of gear principle: