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What’s TMS? GFB’s Turbo Management System is the term we apply to our diverter valves that have features designed specifically for the purpose of turbo lag reduction.
Tests show that TMS features can return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears.
On top of the TMS benefits, the Respons also packs GFB’s patented adjustable venting bias system found on the Stealth FX.
This unique system allows the amount of air vented to either recirc or atmosphere to be infinitely varied to change the venting sound like a stereo volume dial!
So if you want noise with your performance, the Respons can deliver! By fine-tuning the venting ratio, you CAN achieve a blow-off sound WITHOUT throwing a CEL, running rich, stalling, using more fuel or causing any other problems commonly associated with atmo-venting valves on cars with MAF sensors.
Available in a range of universal hose-mount or direct bolt-on configurations for many popular models.
*Features*
* Advanced TMS benefits
* Spring pre-load adjustment for max. response
* Available as universal or direct-fit kit
* Venting configurations:
- Full progressive bias adjustment from recirc (silent) to atmosphere (loud)
- Bias adjustment done manually via cap ring
- C an be locked off in full recirc mode for legality purposes
*Best choice for:*
* Quick and easy venting bias adjustment
* A chieving noise on a car that is sensitive to atmosphere venting e.g. VAG applications
Product Details: This GFB Base Adaptor allows you to fit your GFB valve to a 20mm, 25mm, or 30mm hose or pipe. It is compatible with: Mach 1 (1001), Plumback (1002), Hybrid (1003), Basic (1004), Bovus Maximus (1005).
Most of our kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. It should be noted that our underdrive pulley kits do NOT adversely affect the operation of the accessories. If they did, we would not sell them!
*Features*
* Improved throttle response and acceleration through significant reduction of rotating mass
* Engine feels more free-revving
* Under-driven kits offer more power through reduction of parasitic losses from the accessories with NO adverse affects on their operation
Product Details: This GFB Base Adaptor allows you to fit your GFB valve to a 35mm or 38mm hose or pipe. It is compatible with: Mach 1 (1001), Plumback (1002), Hybrid (1003), Basic (1004), Bovus Maximus (1005).
Product Details: GFB's pulleys are manufactured on the latest Multi-Axis CNC machines from the highest grade 6061-T6 aluminium billet, making them immensely lighter than their factory steel counterparts. This lower weight yields a large reuction in the rotating inertia of the belt train, allowing the engine to accelerate faster. The effect is similar to fitting a lightened flywheel and is particularly noticeable in the lower RPM range before the turbo spools up. This is because the power required to accelerate a heavy pulley accounts for a much greater proportion of the available power at low RPM.
Fits:
Subaru Forester GT (MY98 - 00)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester GT (MY01 - 02)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester XT (MY03 - 04)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester XT (MY05 onwards)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Liberty/Legacy GT (MY03 onwards)
-2001, 2201 and 2010 kits include the required shorter belts.
2009 is the same diameter as factory and therefore uses the original belts.
*No picture available at this time*
Product Details: Fits 1008 GFB Blow Off Valve
Product Details: GFB puts the key to boost control in YOUR hands!
All turbocharged vehicles utilize some form of factory boost control, most of
which display a tendency to be conservative in allowing the boost to build up,
and then taper away noticeably toward redline. A GFB Boost Controller however,
not only allows quick and easy boost level adjustment, but it can also reduce
the boost threshold (the RPM at which boost starts to rise) and maintain a
rock-steady upper limit.
Fits:
Ford Laser TX3 Turbo 4WD KE - KHII (1987 – 1993)
-The TX3, like many turbo cars, is limited in the boost that
it can safely use by the efficiency of its intercooler and turbo compressor and
the capability of its fuel supply system. Boost can be increased to the limit of
the turbo's efficiency, for a good power increase, provided that intake air
temperatures are kept close to ambient and enough fuel is available. Boost
increases should always be made carefully, with the aid of an accurate boost
gauge.
Ford Telstar TX5 Turbo AS - AV (1986 – 1991)
-The TX5, like many turbo cars, is limited in the boost
that it can safely use by the efficiency of its intercooler and turbo compressor
and the capability of its fuel supply system. Boost can be increased to the
limit of the turbo's efficiency, for a good power increase, provided that intake
air temperatures are kept close to ambient and enough fuel is available. For
smaller turbos, like the one used on the TX5, better results are often had by
increasing boost just a couple of psi, rather than pushing it too high and
taking the turbo out of its efficency range.
Holden VL Commodore Turbo (1986 - 1988)
-The VL Turbo uses a screw-in factory pop-off valve on the
inlet manifold, which is nothing more than a spring-loaded overboost protection
device. Typically these leak significantly, and should definitely be removed and
plugged if you intend to raise the boost level.
Mazda 626 and MX-6 Turbo (1986 - 1991)
-The Mazda 626 and MX-6, like many turbo cars, are limited in
the boost that they can safely use by the efficiency of their intercoolers and
turbo compressors and the capability of their fuel supply system. Boost can be
increased to the limit of the turbo's efficiency, for a good power increase,
provided that intake air temperatures are kept close to ambient and enough fuel
is available. For smaller turbos, like the one used on the 626 and MX-6, better
results are often had by increasing boost just a couple of psi, rather than
pushing it too high and taking the turbo out of its efficiency range.
Mazda RX-7 S4 & 5 (1986 – 1991)
-The main factor limiting the maximum safe boost level of a
13B turbo are the standard 2 mm three-piece apex seals. Factory boost is 6.2 psi
for a series 4 RX-7, and 8.2 psi for a series 5. The reliable limit of these
engines is 10 - 12 psi. If the engine is rebuilt and fitted with more durable 3
mm two-piece apex seals, then the engine will safely handle a higher boost
level, although at above 14 - 15 psi, the factory turbo becomes inefficient and
those seeking more power should install a high flow or larger aftermarket turbo.
Mitsubishi Starion Turbo JA - JD (1982 - 1987)
-GFB recommend that an intercooler is fitted to JA - JB
Starions before attempting significant boost increases. Without one, the boost
could probably be increased 1 or 2 psi fairly safely, but adding an octane
booster to each tank of fuel would be a good measure against engine damaging
detonation. Intercooled JD Starions could probably tolerate 2 or 3 extra psi
using high octane (98 RON) unleaded fuel.
Mitsubishi Cordia GSR Turbo AA - AC (1984 – 89)
Mitsubishi CC Lancer GSR (1992 - 1996)
Mitsubishi Lancer EVO
Mitsubishi Galant VR-4 (1990 - 1993)
Nissan 200SX SR20DET S14 – 15 (1994 – 2003)
-The 200SX typically responds well to a modest boost
increase, but the small factory intercooler poses the first restriction in the
quest for power, being unable to scrub sufficient heat from the intake charge to
ward off detonation at higher boost levels.
Nissan S13 Silvia & 180SX CA18DET
Nissan S13 Silvia & 180SX SR20DET
Nissan Skyline GTS-t R32
-Skylines typically respond well to a modest boost increase,
but the small factory intercooler poses the first restriction in the quest for
power, being unable to scrub sufficient heat from the intake charge to ward off
detonation at higher boost levels.
Nissan Skyline GTS-t R33 and GT-T R34
Nissan Skyline GT-R R32 (1989 – 1993)
Nissan Pulsar GTi-R N14 (1990 – 1994)
N12 Pulsar ET (1984 – 1987)
Nissan Z32 300ZX Twin-turbo
Subaru WRX MY94-96
-The factory ECU cuts fuel if it senses boost exceeding
16-16.5psi (1.08-1.12 bar) for more than about half a second. It is common for
these cars to easily handle boost increases up to this level. Beyond this, the
fuel cut can be lifted or removed, but the small factory intercooler will limit
the amount of boost you can run through it.
MY97-98 WRX and Version 3-4 STi
-On the WRX model the factory ECU cuts fuel if it senses
boost exceeding 16-16.5psi (1.08-1.12 bar) for more than about half a second. It
is common for these cars to easily handle boost increases up to this level.
Beyond this, the fuel cut can be lifted or removed, but the smaller factory
turbo will start to run out of puff beyond 15psi, particularly at high RPM. It
is common to see these models drop back to about 12-13psi by redline, even if
peak boost is set above 16psi.
MY99-00 WRX and Version 5-6 STi
-On the WRX model the factory ECU cuts fuel if it senses
boost exceeding 16-16.5psi (1.08-1.12 bar) for more than about half a second. It
is common for these cars to easily handle boost increases up to this level.
Beyond this, the fuel cut can be lifted or removed, but the smaller factory
turbo will start to run out of puff beyond 15psi, particularly at high RPM. It
is common to see these models drop back to about 12-13psi by redline, even if
peak boost is set above 16psi.
MY01-02 (MY02-03 in the U.S.) WRX and STi ("bugeye")
-On the WRX the factory ECU cuts fuel if it senses boost
exceeding 18psi (1.22 bar) for more than about half a second. Boost can be quite
safely increased by a modest margin, and this model shows the biggest
improvements, thanks to a lethargic factory boost curve. Very good low and
midrange gains can be had by the installation of a boost controller.
-The smaller factory turbo will start to run out of puff
beyond 16psi, particularly at high RPM. It is common to see these models drop
back to about 12-13psi by redline, even if peak boost is set above 16psi.
-A word of warning on this model, there is a catalytic
converter placed before the turbo in the up-pipe, and it has been known to fail
with increased power levels (Subaru deleted this cat on the MY03 model). There
is also an exhaust sensor in the same position, which can sometimes trigger the
check engine light with increased power levels. There are a number of companies
making replacement cat-less up-pipes for these models, which is worth looking
into if you plan to modify your car significantly.
MY03-current (MY04-current in the U.S.) WRX and STi
-On the WRX model the factory ECU cuts fuel if it senses
boost exceeding 18psi (1.22 bar) for more than about half a second. Boost can be
quite safely increased by a modest margin, but keep in mind with the higher
compression ratio of this model, large increases should not be made without
proper modifications. This model uses a smaller capacity fuel pump and injectors
than previous models, so the safety headroom is reduced.
Subaru Forester GT (MY98 - 00)
Subaru Forester GT (MY01 - 02)
Subaru Forester XT (MY03 - 04)
Subaru Forester XT (MY05 onwards)
Subaru Liberty/Legacy GT (MY03 onwards)
Toyota Celica GT4 ST205 (1994 – 1995)
Toyota Soarer JZZ30 Twin Turbo 1JZGTE
Toyota Supra JZA80 2JZGTE
Additional Notes:
*Boost increases should always be made carefully, with the aid of an accurate boost gauge*
*Recommend having large boost increases performed on a dyno by an expert*
Product Details:
20mm: This GFB Base Adaptor allows you to fit your GFB valve to a 20mm hose or pipe. It is compatible with: Stealth FX (1008) and Deceptor Pro (1025).
25mm: This GFB Base Adaptor allows you to fit your GFB valve to a 25mm hose or pipe. It is compatible with: Stealth FX (1008) and Deceptor Pro (1025).
30mm: This GFB Base Adaptor allows you to fit your GFB valve to a 30mm hose or pipe. It is compatible with: Stealth FX (1008) and Deceptor Pro (1025).
33mm: This GFB Base Adaptor allows you to fit your GFB valve to a 35mm hose or pipe. It is standard fitting on these blow-off valves: Stealth FX (1008) and Deceptor Pro (1025).
38mm: This GFB Base Adaptor allows you to fit your GFB valve to a 38mm pipe. It is compatible with: Stealth FX (1008) and Deceptor Pro (1025).
Product Details:
Part #2100: Belt kit to fit pulley kits: 2002, 2003 and 2010. 4PK 850 Belt
Part #2101: Belt kit to fit pulley kits: 2000, 2001 and 2200. 5PK 836 Belt
Includes: both kits include 2 belts
Product Details: Install a GFB light-weight under-drive pulley kit and
get better throttle response and more power!
How do they do this?
1. Less weight - GFB's pulleys are manufactured on the latest Multi-Axis CNC
machines from the highest grade 6061-T6 aluminium billet, making them immensely
lighter than their factory steel counterparts. This lower weight yields a large
reuction in the rotating inertia of the belt train, allowing the engine to
accelerate faster. The effect is similar to fitting a lightened flywheel and is
particularly noticeable in the lower RPM range before the turbo spools up. This
is because the power required to accelerate a heavy pulley accounts for a much
greater proportion of the available power at low RPM.
2. Under-driving - Additional power increases also come from making the crank
pulley smaller, thereby slowing down the accessories and reducing the driven
load (particularly at high RPM), without affecting their operation.
Fits:
Subaru WRX MY94-96
-2001 and 2003 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
MY97-98 WRX and Version 3-4 STi
-2001 and 2003 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
MY99-00 WRX and Version 5-6 STi
-2001 and 2003 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
MY01-02 (MY02-03 in the U.S.) WRX and STi ("bugeye")
-Note that the power steering pulley is not removable in this
model, hence only the 2001 two-pulley (crank and alternator) kit fits. 2001 kit
includes the required shorter belts. 2009 is the same diameter as factory and
therefore uses the original belts.
MY03-current (MY04-current in the U.S.) WRX and STi
-2001 and 2003 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester GT (MY98 - 00)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester GT (MY01 - 02)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester XT (MY03 - 04)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Forester XT (MY05 onwards)
-2001 and 2201 kits include the required shorter belts. 2009
is the same diameter as factory and therefore uses the original belts.
Subaru Liberty/Legacy GT (MY03 onwards)
-2001, 2201 and 2010 kits include the required shorter belts.
2009 is the same diameter as factory and therefore uses the original belts.
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