Super charger conversion
Whilst the VX220 2.2 is a fantastic car many people have requested more power and torque, hence the VX turbo, however for many the cost of trading their 2.2 VX in for the turbo model is a huge jump. To fill this gap and make the most of the 2.2's potential we have a supercharger conversion. The super charger lends itself well to this engine, (there is a supercharged version of this power plant used as standard in the United States) In the VX it makes more sense as the super charger does not develop the same radiant heat problems asssociated with the turbo charger. The super charger used is a Lysholm twin screw unit, this type of super charger was selected as it gives a steady supply of boost pressure right across the rev range, which in turn produces a very usefull flat torque curve.
The conversion involves removing the rear clam shell, removing the cylinder head to lower the compression ratio, the con rods are replaced with modified units to provide the underside of the piston with oil spray for increased cooling. Once this work is done the engine is rebuilt with new gaskets and seals, the inlet manifild is reworked to provide locations for the 2 extra injectors and for the fittings for the super charger unit. With the supercharger in place the ancillary drive belt and pulley system is installed. To provide and control the extra power a second engine managment ecu is installed to optimise both the timing and fuelling, whilst all the original tech 2 diagnostic capabilties and not altered. The rear clam shell is then refitted with no need for any body modifications.
The result is 200 bhp and 199 lbft of torque, however this was achieved in Switzerland on a standard exhaust system, air box and 95 octane fuel. This was to keep within the Swiss Opel chassis homologation. Cars in the uk with a free flowing exhaust and 98 octane fuel can expect to see 220+ bhp.
The conversion is fully homoligated to Euro 3 and costs £5500 fitted.
Lots of pix & stuff there too Click Here and Scroll down