DESCRIPTION

Page updated 11-Sep-2009
10-14 Hours fitting time, fully reversible.

VF-Engineering chose to supercharge the all-new BMW 645 to increase throttle response and mid-to-top end power with the centrifugal Vortech supercharger. With the stock 4.4 liter motor, power and torque are already substantial. However this upgrade is for the V8 enthusiast who demands more than substantial power. The new found power makes the 645 more powerful than a stock E64 M5 and a potential contender to the new E60 M5 V10. As a daily driver the supercharged 645 SMG is a mild mannered beast waiting for the throttle body to opened wide. It is easy to slide the back end out under full throttle and launch the V8 to rediculous speeds way above the limit in a split second. Good brakes and self control are suggested pre-requisites.

Maintaining the the original BMW quality, smoothness and reliability were the key factors in the VF design. This is where the GIAC software comes into full play. VF have harnessed reliability of Vortech superchargers and quality of GIAC custom software with their 10 years of supercharging experience and worldwide OEM supply contacts to create the ultimate supercharger system for the ultimate drivers car.

All key components are 100% made in California. This system has been fully road tested and dyno tuned on both the GIAC Mustang MD500AWD and in-house Dynojet 224XLC dynamometers with and without engine load. All kits are setup at 6 psi and create as much, if not more power than similar products running greater levels of boost.

VF engineers spent over 12 months software testing the BMW Bosch and Siemens ECUs. Software flash technology and latest BMW file versions have all been employed to provide the cleanest and the most reliable method of software installation. GIAC engineers extensively re-wrote the ECU software using their own binary, assembly and disassembly algorithms written from scratch. Testing the software included extensive road and dyno test cycles, with acceleration and deceleration tests for driveability smoothness and ECU fuel management. All test cars were put through long term full throttle testing in conditions varying from wet cold climates to hot dry Arizona desert temperature for safe-optimal air fuel ratios and knock activity monitoring. Competantly written ECU software has allowed VF to fully explore the potential of the BMW engine making over 40% more power in most applications.

VF chose to mount the Vortech supercharger with an in-house CNC machined aluminum bracket system. The unit is positioned in line with a bolt-on crank pulley with an additional active OEM tensioner using a dedicated serpentine belt. The key to reliable superchargers sytems is the the active belt tensioner which eliminates belt slip. The supercharger air ducts are custom molded in-house from plastic to give an OEM appearance, quality and fit. The incorporated Bosch boost overrun system is designed for smooth off-throttle cruising and deceleration with clean emissions. The crankcase ventilation system is designed to cope with positive pressure and high flow OEM injectors are supplied to fit as direct replacements without modification to the injector rail.  A removable plastic air box is provided with the K&N induction filter for those who use their vehicles in persistently wet climates.

VF aftercooled the 645 by integrating a chargecooler into a cast aluminum intake manifold included with the kit to replace the original manifold. This design approach reduces the length of pipework by about 75% required for a remote mounted chargecooler core or air/air intercooler. The simple and compact design make this kit integrate neatly into the V8s engine bay.

The VF supercharger system remains fully OBD2 compliant and is supported by a 1 year unlimited mileage warranty on the product only. Installation can be performed in approximately 10-14 hours and is non-intrusive allowing it to be fully reversible.

Right: The SLA 3D model of the VF replacement intake manifold is shown mounted in the 545/550 engine bay. The manifold contains an integrated water-intercooler for optimal after cooling. Left: The manifold is flow tested on VF's Superflow 1020 flow bench.

Every aspect of this kit has been fully engineered for high quality fitment and highly demanding performance and expectation. VF's in-house horizontal, turning and milling CNC's and plastic molding plant, GIAC's industry reputation and track record and Vortech's reliability have been fully exploited to create a product with internationally un-rivaled material technology, quality and performance.    

Not all vehicles respond identically to engine modifications which is why it is important to consider the "delta" or relative power increase measured on the same dyno before and after modification. Power gains shown by VF have been found to be accurate on test vehicles on 91 octane at sea level, with stock setups (ie throttle body, exhaust system etc). The GIAC software adapts just as the OEM software and a slight increase in performance may be expected from the use of higher quality fuels such as 93 octane. Power gains may vary according to factors such as altitude or vehicle condition.

This product is not compliant by California state emission law and not rebuilt for use on public roads in California.