GFB Respons TMS Valve (part T9025) - Manual (Page 4)

Adjusting the Noise
The unique patented venting bias adjustment feature on
the GFB Respons lets you vary the amount of air vented
to atmosphere or recirc, thereby changing the volume of
the sound.
Turning the venting bias adjuster fully anti-clockwise
means all the air will vent through the trumpet, which is
the loudest setting.
Turning the adjuster clockwise from this position will
begin to open up more of the recirc outlet, until a ratio of
50/50 is reached. As you turn the adjuster further clockwise, the recirc port is fully open and the
trumpet port will begin to close. When the adjuster reaches the maximum clockwise position, the
trumpet is completely closed, and the valve will operate like a factory recirculating bypass valve.
Notes on atmosphere-venting:
Typically, most engines will allow at least 50% atmosphere venting with no problems, provided the
spring pre-load is adjusted correctly. Some cars will even accept up to 100% atmosphere venting
without any issues, whilst others may require less than 50%. The key benefit of the venting bias
adjustment feature is it allows you to dial in exactly how much air is vented to atmosphere without
causing problems that are typically associated with atmo-venting valves such as stalling and check
engine light error codes.
Do not be afraid to experiment with the spring and noise settings, no harm will come to the engine
if wrong setting is used, however if a check engine light error does occur, simply dial back the
amount of atmosphere venting.
Maintenance
GFB blow-off valves are designed to be as maintenance-free as possible. In most cars the small
amount of crankcase and rocker-cover oil vapor that is directed into the intake system is enough to
keep the piston well lubricated. However, if you notice the sound of the valve changing over time
(e.g. slow response time, intermittent operation), or if you can see that the piston is not moving
smoothly, it may require a clean and re-lube.
Put a rag under the valve to catch any parts that may drop, or better yet, remove the Respons from
the car entirely. Remove the four screws holding on the cap, taking care as the spring will try to
push the cap off as the last screw is removed. Remove the spring and the brass piston, and wipe any
grime from the inside of the valve and the piston with a rag. Apply normal engine oil to the piston
and the inside of the bore, and re-assemble.
Technical Support
If you experience any issues during installation or use of your GFB Respons that are not answered
in these instructions, please contact the GFB tech support team on +612 9534 0099, or email
[email protected] .