BOV Manufacturers - BOV Kits
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BOV Manufacturers - BOV Kits
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BOV Manufacturers - BOV Kits
Apexi
The Spec-II BOV is Apex’s latest version of our popular blow off valve.
The Spec II’s unique design allows for quicker response without causing
any excessive turbo lag between gears. Adjustable spring tension allows
the release point to be matched to specific engine set-ups.
Bailey
Dump valves/BOVs are not a new idea and have been around since the early
1980’s. Their function is to release un-used boost pressure when lifting
off the throttle of a turbocharged car.
After many years of exhaustive testing on road and high powered race
cars, Bailey Motorsport introduced the piston design in 1997.
All 3 types of Bailey Motorsport piston dump valve/BOVs are precision
CNC machined state of the art seal technology, and are designed to be
re-buildable.
Blitz
1.Employs the Dual Drive System succeeded from the Super Sound Blow Off
Valve DD.
2.Employs high quality aluminum die-cast for the body.
3.Ensured heat dissipation radiation by designing the body and funnel
with ribs.
4.Creates a sharp sound by adopting the Venturi effect.
5.Defric Coated Piston made smooth movement even under dusty conditions.
36mm Diameter Big Valve with Special Rubber Seal ensured an outstanding
sealing ability at high boost.
6.Recirculation Flanges are available at optional in 3 diameter sizes.
Forge
Motorsport
Forge make a massive range of BOVs and special in VAG vehicles. From
recirculating to blow off valves Forge has got you covered. Forge also
manufacturer a "Splitter" BOV which is the best of both worlds, it
recirculates and makes the normal BOV sound at the same time. The
Splitter is guaranteed to work without causing a check engine light.
Greddy
GReddy Blow Off Valves (BOV) are easily adjustable to eliminate
compressor surge and preventing premature boost leakage, while
increasing boost response between shifts. Each valve is made of durable
cast and billet aluminum frame and the valve to diaphragm ratio provides
performance that cheap piston types cannot offer. The spring stiffness
adjustment screw and the three different sizes give the GReddy user the
option to match vehicles with mild upgrades to heavily tuned engines.
There are many factors in matching a blow-off valve to an application,
valve location, turbocharger size and pressure, but as a general rule of
thumb, we recommend the Type RS for 100-400hp, Type R for 260-450hp and
the Stiff Spring Type R for over 400hp applications. Also available in
easy to install kit form for many turbocharged vehicles.
HKS
HKS compressor blow off valve (BOV) and bypass valves play a vital role
in any turbo system because they not only improve the performance of
your vehicle but they also increase the longevity of the turbocharger as
well. The primary function of any blow-off or by-pass valve is to
prevent compressor surge by relieving the compressed airflow that
reverses direction as the throttle is closed. HKS blowoff (BOV) and
bypass valves reroute the pressurized air, that is normally forced
backwards into the turbo compressor, into the intake stream or by
venting it to the atmosphere. Subsequently, engine performance is then
increased from quicker turbo spool up, as the compressor speed is not
reduced by the backward airflow. The longevity of the turbo is also
increased, as its bearings will not suffer from the impact that is also
produced by compressor surge. Though many vehicles incorporate factory
by-pass valves, they are often undersized and quickly are beyond their
capable operating range as airflow levels are increased. HKS offers four
types of compressor blowoff and bypass valves: Standard, Racing, Super
SQV, and the Super SQV Racing Single Valve.
Turbosmart
All Turbosmart blow off valves BOVs are made out of tough and durable
billet aluminium and offer a host of features designed to give them
superior flow and performance. Turbosmart’s Universal Fit BOVs have been
developed to fit most popular makes and models and come supplied with
pictorial fitting instructions on a CD.
TurboXS
With new and improved styling, the BOV-H-RFL remains true to it's roots
- it's still really f'n loud! Like all our valves, the RFL relieves
compressor pressure surge caused by changing gears or backing off the
throttle and has been used on turbo charged engines running upto 35 psi
boost. If you need to ask how loud it is, this valve is too loud for
you! Blow Off Valve Type H-RFL comes standard with both a mild steel and
aluminum weld-on adapters. Bolt-on kits are available for most OEM
turbocharged applications.
BOV FAQ @ Alltrac
An article going into the working of a BOV in more detail
"Pressure release valve or more commonly known as a "Blow Off Valve", releases turbo pressure when the throttle plate is closed. The turbo is still spinning and still creating pressure. The forced air will hit the throttle plate and return where it came from. When a BOV reads vacuum from the manifold, it either opens a valve, or softens the valve. Which lets the pressure escape from it's opening. In order to work correctly the air must go back into the intake before your turbo because the Air Flow Meter has accounted for it. If not you will have a temporary rich condition which will upset your idle slightly. Proper tuning can get around this hassle. Most choose to vent to the air, as they love the sweet sound the air makes when it runs to the atmosphere. If the pressure release valve (as some call it) contains a horn or small holes/vents it will cause the air to make a louder/higher pitched sound depending on what is used. " - read the full article here
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