Using the In-Car Head Unit
When powered up the dial backlight will glow bright red, and will then automatically dim 10 seconds later to reduce
unnecessary glare, and will also reduce power to the motor –this is the “sleep” mode. To wake the unit up, simply
press the dial briefly before making adjustments.
The position of the dial is directly proportional the venting bias - turning the dial fully anti-clockwise sets the valve to
100% recirc, fully clockwise results in 100% atmosphere venting, and any ratio is possible between these limits.
The head unit also has a range limiting feature. This can be used to limit the maximum atmosphere-venting bias of the
Deceptor Pro II. For example, if you prefer that the maximum atmosphere venting bias is 60%, you can program the
controller so that full travel on the dial gives you only 60% movement at the valve. This is particularly useful on cars
that, through experimentation, find that full atmosphere venting does not agree with them.
To use this feature, set the dial in a position that you want as your maximum atmosphere-venting limit, then press and
hold the dial until the lights flash. The unit will record this new position as the maximum atmosphere-venting limit.
Now when you turn the dial fully clockwise, the Deceptor Pro II will only open as far as the point which you have just
set. For example, if you pushed the button with the dial set in the middle (50% atmosphere venting), full travel of the
dial will now move the valve from full recirc to 50% atmosphere-venting only.
Every time the button is pushed, the position of the dial will determine the maximum venting bias of your Deceptor
Pro. So to re-set the range to maximum again, simply turn the dial fully clockwise, then press and hold the dial.
Maintenance
All GFB valves are designed to be as maintenance free as possible. In most cars the small amount of crankcase and
rocker-cover blow-by oil that is directed into the intake system is enough to keep the piston well lubricated. However,
in some cases oil deposits or dirt can dry out and create a build-up on the piston that causes erratic operation or
sticking. If you notice a grey film on the piston or erratic venting behavior, it is a good idea to clean the valve.
This is best done with the valve removed from the car. Flush out the piston with a penetrating spray such as WD40,
whilst working the piston up and down. Using a rag, wipe off as much of the grime and build-up as possible. Re-
lubricate the valve by applying a small amount of engine oil to the piston through the side outlets and the underside of
the valve, and working the piston up and down by hand. It is a good idea to keep the trumpet area clean and free from
oil, as it attracts dirt which can result in damage to the piston.
Customer Support
GFB’s engineers are always available to help with any enquiries or issues you may have with the installation or use of
Within Australia: 02 9534 0099
International: +612 9534 0099
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/drivetrain 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.
