Dawes Devices MK II Basic
second best boost controller in the World (second only to our
same Quality Features as our Hybrid, but with a stainless steel
mechanism (and no seat polishing). The cost savings are passed on to
Classic Design: at an
Rating of over 99%
Assures Fully Functional Controllers Everytime!
Applications: All turbocharged engines, including OBDII
(includes 7 page online manual)
To provide an inexpensive way to allow more boost by eliminating
computer control of the wastegate, and to save you $300, when
compared to an electronic controller.
works: Our boost controller mounts in-line between the intake
manifold (or turbo nipple) and the wastegate. The controller holds
the signal from the wastegate until the desired boost level is
reached. By conditioning the boost signal this way, the following
a) Time to Peak
Boost is dramatically improved
b) More boost
"area under the curve" for increased mid-range torque!
c) Boost limit
is raised to the point that you, not the ECU, desire!
Is this a
"bleed"?: No. It is a pressure-controlled device, unlike a
bleed. One big disadvantage of a bleed is that the boost signal is
always acting on the wastegate as the boost builds. This means
that the wastegate is allowing exhaust gas to bypass the turbine
at the exact time you need it to be spooling up your turbo. The
Basic Boost Controller holds the signal from the wastegate until
it reaches the level that you have set. Because of its rapid
actuation, "spiking" (momentarily exceeding the boost limit) is
almost completely eliminated. Some electronic controller companies
actually try to promote spiking as a positive feature, because
their controllers cannot react fast enough to accurately control
Install This Myself?: Yes! Probably in about 15 minutes.
Click here for the complete
Basic Boost Controller be used on OBDII equipped vehicles?:
Yes!!! OBDII (On Board Diagnostics--Generation 2) equipped
vehicles (most, since 1995) respond to our boost controller with
the same favorable results as non-OBD vehicles. You may use our
controller to improve turbo spooling at the factory boost level,
or raise the boost to enjoy increased power. Since the engine
computer is programmed to accommodate a spike-prone factory boost
control, it is already set up with fuel maps to support an
increase in boost. In most cases a 15-20% increase in boost can be
supported by the factory ECU programming without danger of a lean
mixture, or illumination of the "check engine" light. If you
already have a boost gauge installed, you will notice that your
"factory" boost level will sometimes overshoot the intended peak
(or "spike") and then settle back to a sustained level. Our
controller is much less susceptible to these boost spikes,
allowing you to use the full boost level programmed into your ECU.
By using our boost controller, you may set the sustained boost to
the level that the factory control used to spike to. This allows
you to safely exploit the large error margin programmed into your
ECU. You may also notice that your boost level will drop after a
sustained period in high gear. With our controller, you will
retain the full boost level available from the turbocharger, right
up until your nerve (or the ECU's speed limiter) intervenes.
How does the
Basic Boost Controller compare to electronic boost controllers?:
Well, for one thing, its about $300 to $600 less expensive. It
also has 2 moving parts and no electronics, so reliability is
improved. Also, many electronic controllers have a "learn" setting
that your engine must endure. This "learning" mode allows your
boost to fluctuate wildly until the controller adjusts it's
response time. This is akin to unplugging your wastegate for a few
full throttle runs. Not the ideal situation to say the least!
Additionally, the SD Boost Controller may be removed in 5 min, to
return the vehicle to factory condition. This provides a distinct
advantage should you choose to hide your modifications from the
dealer, or curious eyes.
Can I use it
with my performance "chip"?: Yes, although the gains will
probably be of a lower magnitude than those of unmodified cars.
This is because many chip manufacturers have already raised the
boost to the upper limit of what the factory fuel system can
support. Additional gains can be found by using the Basic Boost
Controller if the chip manufacturer allows the boost signal to
reach the wastegate before peak boost is achieved. This is usually
the case, as the factory boost control solenoid cannot respond
fast enough to control "spiking" unless the rise-time is slower
back up my factory warranty should I become overzealous and damage
my engine?: Note that carelessly increasing the boost without
monitoring air/fuel ratios or exhaust temperature may damage your
engine. It is not possible for us to accept responsibility for
your actions should damage occur. However, there are many air/fuel
ratio meters available,
to monitor your progress. Such products will help you to avoid
mishaps from lean fuel mixtures. Also, this same risk is present
with an electronic controller or a chip. As those companies must
also limit their responsibility, so must we. We will replace the
valve with an identical one, should a defect in workmanship be
discovered. One benefit of the Basic Boost Controller is that it
is easily removed should a warranty issue arise. However, we do
not endorse this action as it would be dishonest.
Basic Boost Controller hurt my wastegate actuator?: No. In
fact, it can extend its life by preventing a vacuum signal from
reaching the actuator. This reduces the flexing of the diaphragm,
extending its life.
high can I raise the boost?: Provided you have the fuel to
accommodate the extra boost, the Basic Boost Controller will allow
you to raise the boost limit to over 17psi. Actual limits of the
valve are dependent on variables, which include turbo size and
wastegate actuator parameters. The included instructions describe
methods to modify the controller, should you find that you are
unable to reach your target boost with the stock valve
configuration. Also, keep in mind that some turbo systems will cut
fuel delivery above a preset factory limit, usually 14.7psi.
Please see our Fuel Cut Eliminator to eliminate this issue.
What's in it
for us?: Well, for one thing, a little profit. But more
importantly, we want everyone to enjoy a low priced boost
controller. We have been disappointed to see other companies
offering manual and electronic boost controllers that work no
better, but cost 15 times more.
much?: The price is $38. Everything you need is mounted on the
controller. The valve is shipped pre-set at a level that is safe
for all vehicles. You will follow the simple instructions to
gradually and safely raise the boost.
Although most factory turbo systems will easily accept boost
increases of 20-30%, air/fuel mixtures should be monitored when
raising boost above factory limits. This applies to any boost
controller. It is a good idea to use one of the gauges mentioned
above and raise the boost SLOWLY. Again, we can not be held
responsible for damage caused by overzealous boost adjustment.
design, carefully manufactured in our clean, controlled
environment. If you are looking for the best budget
you've found it!
include or email us, your address, vehicle make and model, and
current boost setting with your order. Look for an upcoming review
of our manual boost
Still not convinced? Email us your questions at
An Evolution of
Gus Mahon's G-valve, designed to be an effective,
inexpensive solution to your boost control needs. Take control of
your turbo system today!
$15 Anywhere else in the
world, regardless of order size!