GFB Deceptor Pro II (part T9535) - Manual (Page 2)

Blow-off valve installation
For cars without factory fitted blow-off valves, a
location for the Deceptor Pro II must be found
on the piping between the turbo outlet and the
throttle body, and a suitable adaptor must be
welded in that location. GFB has a range of
weld-on adaptors in aluminium or stainless steel
for this purpose. A hose to connect the Deceptor
Pro II recirc outlet must also be fitted to the
piping before the turbo (after the airflow meter if
one is installed).
NOTE: GFB recommends mounting the BOV
closer to the throttle body rather than the turbo,
since some factory turbo piping can cause
pressure
drops which may affect the
performance of the valve. If an intercooler is
used, it is preferable to mount the valve after the
intercooler, before the throttle.
1) Pipe mounting - Once a suitable 25.4mm (1”) O.D. metal pipe has been welded to the turbo piping,
insert the supplied o-ring into the internal groove in the base of your Deceptor Pro II, and partially
thread the M5 grub screws into the tapped holes. Smear a little oil or grease on the o-ring, and slide
the valve onto the pipe. Make sure that the pipe passes fully through the o-ring and bottoms out in the
valve base, and then lock the valve in place firmly with the grub screws. Thread the supplied nuts
onto the ends of the grub screws and tighten – this is to prevent the grub screws working loose.
2)
Hose mounting – Push the base of the Deceptor Pro II into the hose, and secure with a hose clamp.
Ensure the clamp is seated on the straight section of the hose fitting, and not on the retaining bead.
3) Connect the recirc outlet of the Deceptor Pro II to the recirc hose and secure with a hose clamp.
4)
Connect the vacuum nipple on the top of the Deceptor Pro II to a suitable manifold vacuum source
(after the throttle body), using rubber or silicone vacuum hose of at least 4mm I.D. Try to avoid
attaching any other hoses and t-pieces to the vacuum hose and keep it as short as possible, as this will
ensure rapid response from your GFB valve. DO NOT CONNECT THE VACUUM HOSE TO
BOOST CONTROL, FUEL PRESSURE REGULATOR OR BRAKE BOOSTER HOSES.
Adaptors Available
Base (inlet) adaptors:
5325 – 25mm hose base
5330 – 30mm hose base
5338 – 38mm (1.5”) pipe mount base
Recirc (outlet) adaptors:
5220 – 20mm
5225 – 25mm
5233 – 33mm
Weld-on pipes:
5601 – 1” O.D. mild steel
5602 – 1” O.D. aluminium
5603 – 1” O.D. stainless steel