special tools or modifications required.
10-12 Hours fitting time, fully reversible.
is the first to develop and build a supercharger kit with true OEM quality and
drivability for the Volkswagen MK4 chassis. It is also the first truly do-it-yourself
and reversible conversion kit, using the famous "bullet proof" Vortech
Engineering supercharger unit. The key to the design of this supercharger kit
is the simplicity with which it can be bolted on. The kit is supplied with every
part needed to get your car up and running supercharged on the same day.
MK4 VR6 24v was made for the US and Canadian markets from 2002>04 combining
the VR6 heritage but packed with a 4 valves per cylinder newly designed head.
The 24V head was designed by Cosworth Engineering and opened up the VR6's lungs.
The equivalent model was released in the rest of the world earlier in 1999.
Packaged with the 4 motion driveline and titled "V6 4Motion", the
non-US models were otherwise identical. The MK4 24V inherited all the features
from the MK4 12V for example the "egas" also known as "drive
by wire" and the plastic variable runner intake manifold. This combination
is an evolution of the VR6 engine first released in 1991 in Europe. With its
narrow angle V-block and single cylinder head, the VR6 is a powerful and reliable
engine design. In stock form, the VR6 is quick off the mark thanks to the variable
intake, but looses acceleration at high rpms, making it an ideal candidate for
centrifugal supercharging. The VF stage 1 supercharger conversion adds 80hp,
and the stage 2 adds 105hp using an air to air high-flow front mount intercooler.
worked with GIAC engineers to re-tune the ECU which makes this product a comprehensive
tuned package raising the VR6 hp rating by almost 50% at the wheels! All testing
and development was performed with Californian 91 octane gasoline and dyno numbers
reflect this. GIAC engineers extensively re-wrote the ECU software using their
own binary, assembly and disassemble 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 VR6 engine. In tests using
higher octane pump gasoline, power output increased by an additional 5% and
even higher with high octane race fuels.
reliability, and stock feel are major factors in the extensive R&D carried
by VF-Engineering in Europe and the USA. The custom proprietary VF.GIAC software
supplied with this kit safely re-aligns all fueling and engine management parameters.
Unlike other forced induction solutions, VF-Engineering's kit is designed to
work safely within Volkswagen's OEM parameters thus minimizing the likelihood
of spurious DTCs (Diagnostic Trouble Codes) or Check-Engine Lights.
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.
all chassis dynos produce comparable results 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, with stock setups (i.e. throttle
body, exhaust system, cams, 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.
1 is set up to create 6psi manifold pressure at peak boost. This simple to fit
kit is a fully tuned system ready to bolt-on and drive. As a fully reversible
conversion this modification is simple to maintain and understand for most DIY
enthusiasts. Takes approx. 10 hours to fit.
2 is an upgrade package designed to add onto stage 1. A complete combined stage
1&2 can be ordered if desired also. Stage 2 includes a boost increase kit
and larger set of custom fuel injectors, high flow fuel pump, large MAF housing,
idler with bracket for increased belt wrap, 3" thick high flow front mount
intercooler and upgraded ECU software. This is also a reversible and simple
to fit conversion taking approx. 7 hours to fit.
- Product launch
01 Feb 03.
- GIAC custom
tuned stage 1 & 2 software
- RPM limiter
increased to 7000 rpm
- Soft rev limiters
SC pulley belt wrap
idler pulley bracket for high boost stages
- Bosch OEM
pressure relief bypass systems
- Polished ceramic
aluminum coated mandrel bent pipework
- 6061 Billet
aluminum CNC bracketry
- Polished ceramic
aluminum coated pipework
- 4 ply silicon
couplers with OEM screw clamps
swivel fittings with high pressure OEM oil lines
Gates OEM serpentine belt
- Stage 2 high
capacity Bosch fuel injectors
- 1 year unlimited
mileage warranty on major parts
Made in California, USA
Stage 2 Upgrade
- Boost increase
from 6 to 8 psi
- 3" High
flow intercooler rated to 500hp
billet tensioner idler and bracket
- High flow
custom Bosch injectors to fit under the stock manifold
housing for MAF
- Custom in-tank
direct replacement OEM high flow fuel pump (rated to 420+hp)
- An additional
pressure bypass system
product is not compliant with the California Air Resource Board and not for
use on public roads in California. This applies to any aftermarket product that
does not display a CARB EO#.