GFB Deceptor Pro II Blow-off Valve (part T9505) - Manual (Page 2)

Deceptor Pro II (part # T9505)
Thank you for purchasing the GFB Deceptor Pro II blow off valve. We highly recommend that you familiarize
yourself with the operation and adjustments of the Deceptor Pro II before installing it.
Installing and wiring the in-car volume controller
CAUTION: Because the two valves supplied in this kit are mirrored, one of the extension looms contains a
signal reverser so that both valves work in unison. It is VERY important that the CORRECT valve is
connected to the reversing loom, or damage could occur. Please pay close attention to the steps below:
1) Plug the wiring “Y” loom into the upper BOV slot in the back of the control box
2) Plug the extension wires together according to the numbers attached to each plug and valve, i.e. connect all
plugs with a number 1 together, and all plugs with a number 2 together
3) Plug the power cable (red and black wires) into the lower slot in the back of the control box
4) Connect the red power wire to the positive terminal of your car’s battery or a 12V source. Connect the black
wire to the negative terminal. Upon initial power-up, the valves will perform an open/close cycle before
reverting to the position indicated on the controller dial. By turning the dial and watching through one of the
valve’s venting outlets, you will see the inner sleeve move to open or close each of the venting ports
alternately, which is how the venting volume is adjusted
5) Once the correct operation is confirmed, disconnect the valves and continue with the control box installation
6) Find a suitable location on or around the dashboard, steering column or instrument binnacle for your in-car
volume controller. Clean both mating surfaces with Methylated Spirits or similar cleaner and secure the
controller using the supplied double-sided tape. Press hard and hold the unit for about 30 seconds, and note
that it takes up to 24 hours for the tape to develop a strong bond
7) Using a multi-meter or voltmeter, find a suitable power wire that reads 12V only when the ignition is turned
on. Solder the end of the volume controller positive (red) wire to the 12V source. It is possible to use a wire
tap or crimp instead, but soldering is the most reliable joint. Make sure to insulate the joint properly
8) Find a suitable bolt on the body/chassis and connect the unit’s ground (black) wire to it
9) Pass the controller’s extension leads through the firewall into the engine bay. Often there is an existing
grommet that can be used for this purpose. In any case, it is important to ensure that the lead is protected
where it passes through the firewall to prevent wear or damage. Now proceed with the valve installation
Using the In-Car Controller
When powered up the volume dial rim will glow red, and will brighten for easy reading when you make an
adjustment, then automatically dim 3 seconds later to reduce unnecessary glare. 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 proportion is possible between these limits.
The controller also features a program button on the rear of the casing. This can be used to limit the range of the
atmosphere-venting bias of the Deceptor Pro II. For example, if you prefer that the maximum atmosphere venting bias
is 50%, you can program the controller so that full travel on the dial gives you only 50% 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 program button until the dial flashes. The unit will now record this 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