GFB DV+ (part T9355) - Manual (Page 4)

Installation - continued
? Install the DV+ assembly onto the turbo,
making sure to hold the piston so it doesn’t fall out
during this process. Don’t forget to use the
supplied longer screws.
? Clip the electrical connector back on, then re-
install the turbo intake pipe.
? Re-fit the rubber dipstick boot.
? Re-install the engine cover, making sure the
vacuum hose on the top right corner is connected.
This product is intended for racing use only, and it is the owner's responsibility to be aware of the legalities of
fitting this product in his or her state/territory regarding noise, emissions and vehicle modifications.
GFB products are engineered for best performance, however incorrect use or modification of factory systems
may cause damage to or reduce the longevity of the engine/drive-train components.
GFB recommends that only qualified motor engineers fit this product. Warranty is for the period of one year
from the date of purchase and is limited only to the repair or replacement of GFB products provided they are used
as intended and in accordance with all appropriate warnings and limitations. No other warranty is expressed or
implied.
Using the main spring
The DV+ can be configured in two different ways, depending on your desired outcome. Fitting the DV+
with the main spring installed as shown on the previous page can be thought of as a “Sport” mode,
offering the best possible throttle response and boost recovery during on/off throttle applications (i.e.
during gearshift with a manual transmission).
Using the main spring means the DV+ can open and close progressively in response to how much boost
pressure is present, unlike the factory diverter which just opens fully regardless of whether there is boost
to vent or not. Because this operation method is different from the factory diverter, it is not unusual to
hear a different sound from the intake when lifting off the throttle at low RPM, especially if you have an
aftermarket intake or a larger turbo installed.
Additionally, in some cases this different operating method may be mis-interpreted by the ECU as a faulty
diverter valve (is simply sees the diverter doing something different, it doesn’t know the diverter is
actually attempting to improve throttle response), resulting in fault code P2261 being recorded. This
does not indicate that the DV+ is faulty, nor does it cause any issues to the turbo or engine.
If the idea of a possible fault code of different sound bothers you, and you simply want a direct
replacement for the factory diverter that is stronger, holds boost better, and lasts longer, you can choose
to install the DV+ WITHOUT the main spring behind the piston. This configuration can be thought of as an
improved “Standard” mode, which behaves just like the factory diverter, but with the added benefits of
better boost-holding, strength, and reliability.