VF Engineering Stage 1 Supercharger System 6.0psi BMW E39 540 1998

Horsepower: 282 to 415 (Gain of 133 HP)
Torque: 310 to 395 (Gain of 85 ft/lbs)

VF-Engineering chose to supercharge the BMW 540 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 newfound power makes the 540 more powerful than a stock E39 M5 in many areas of the rpm range. As a daily driver the supercharged 540 is a mild mannered beast waiting for the throttle body to to be flung open. It is easy to slide the back out under full throttle and send the 5 series V8 to speeds way above the limit in a split second. Good brakes and self control are suggested pre-requisites.

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 stage 1 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 and resolved "stalling and MAF issues" faced by other supercharger systems. 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. Competently-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 the original serpentine belt which is replaced with a longer OEM belt. The key to this design is that the OEM active-spring belt tensioner remains fully functional and eliminates belt slip or the need to manually tension the belt. 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.The VF supercharger system remains fully OBD2 compliant and is supported by a 3 year unlimited mileage warranty on the product only. Installation can be performed in approximately 8 hours and is non-intrusive, allowing it to be fully reversible.

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.

Stage 1 is set up to create 6psi peak manifold pressure at peak rpm, taking the BMW 540 from approx 250hp up to 350hp at the wheels, representing an gain of 120hp at the flywheel. VF has found stock 540's to dyno between 235-250hp at the wheels but still showing a supercharged power increase to 350-360hp at the wheels. This represents a peak gain of 130hp at the wheels, equivalent to a 150hp gain at the flywheel.

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 (i.e. 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. Automatic vehicles are compatible but due to the nature of the transmission, dyno measurements are not made.

Specs:
- GIAC custom tuned stage 1 software
- RPM limiter increased to 7000 rpm
- Soft rev limiters and top speed governor removed
- Vortech V2 Super Quiet SC trim polished supercharger
- 3 year unlimited mileage limited product warranty
- VF- CNC machined 6061 aluminum bracket system
- OEM BMW idler pullies
- OEM High flow fuel injectors
- VF- Custom molded polypropylene ducting
- VF- Custom tuned supercharger intake
- Bosch overrun bypass valve system
- Custom crank case ventilation system
- 4 ply silicon couplers with OEM screw clamps
- VF- CNC oil fittings with high pressure OEM oil lines
- Additional OEM serpentine belt
- Bolt on crank pulley and OEM belt tensioner
- K&N induction filter with cold air intake and optional air box
- Comprehensive installation CD-ROM
- Compatible with automatic transmission (please specify)
- Precision Made in California, USA