What
is an exhaust brake?
Exhaust brakes fit in the exhaust system, downstream from the
turbocharger, and provide braking assistance by creating engine
backpressure from the vehicle's exhaust. The resulting backpressure
safely slows the vehicle without damaging the engine and prevents
wear on the service brakes. Most importantly, backpressure equals
braking power. Controlling the amount of backpressure is what
makes a good exhaust brake.
Introducing
the Pacbrake PRXB
Pacbrake’s flagship product, the PRXB (pressure regulated exhaust
brake), is the unquestioned leader in the supplemental brake industry.
The patented PRXB design delivers the strongest braking horsepower,
greatest speed reductions and shortest stopping distances possible
without the use of service brakes. It maintains optimum retarding
performance by maximizing the exhaust backpressure throughout the
entire RPM range. Unlike a typical exhaust brake, which requires high
RPMs to work properly, the PRXB delivers constant exhaust pressure
(braking) as early as 1200 RPM through to the maximum allowable RPM.
Why choose
Pacbrake's PRXB?
The problem with exhaust brakes in the past is that as the vehicle
slows down, the RPMs drop and you lose backpressure - resulting in
a loss of braking power. Pacbrake's PRXB addresses this ver issue
with a patented waste-gate valve that is designed to close as the
engine RPMs begin to drop. The closing of this valve will maintain
engine backpressure and therefore provide constant braking power,
especially at the lower to mid-range RPMs where you need it the most.
Pacbrake’s
PRXB Exhaust Brake has revolutionized the braking
industry. Adapted for a variety of diesel vehicle applications, the
PRXB provides the strongest braking horsepower, greatest speed reductions
and shortest stopping distances possible without the use of conventional
brakes.
Exhaust
Brakes for Diesel Trucks
If you've ever traveled downhill with a heavy load, you may have asked
yourself "Will I be avle to slow down: Will my brakes hold?"
Not only can hills overpower your truck's braking system, they constantly
contribute to heavy wear on your brake pads. Over time, this unnecessary
wear decreases your brake's effectiveness and can leave you without
the brake power you need while traveling on your next trip. A supplemental
braking system, such as an exhaust brake, will alleviate any doubt
you have of your truck's braking avilities.
Steep
Hills & Red Lights
The PRXB delivers the strongest braking horsepower, greatest speed
reductions and shortest stopping distances possible without the use
of service brakes. Unlik a typical exhaust brake which reuires high
engine RPMs to work properly, the patented PRXB delivers constant
exhaust backpressure (braking) as early as 1200 RPM through to the
highest allowable RPM. Not only does the PRXB provide increased performance,
it offers peace of mind with technology that protects from engine
overpressure potential.
WHAT’S
SO SPECIAL ABOUT THE PRXB?
In order to have consistent and effective braking over
the entire RPM range, it is important (and necessary) to maintain
constant backpressure. To achieve this, Pacbrake’s patented
design has incorporated an additional waste gate on the butterfly
valve to regulate the amount of exhaust flow that is being passed
through. The flow is controlled by a spring-loaded arm, whose pressure
rating and location are key factors in the functionality of the PRXB.
Located outside of the housing and away from the heat, the spring
is able to maintain its strength and durability for years of proper
and precise braking performance.
Stainless
steel sealed air cylinder with high performance seals
Maximum allowable
exhaust backpressure. Factory preset limit designed to meet the
requirements set by the engine manufacture
Both mounting
surefaces are machined, therefore, eliminating the need for gaskets
Arcor nitrided
housing and components to increase resistance to wear and corrosion.
Strengthens and adds lubricity
When not
activated, exhaust flow in unrestricted and doesn't interfere
with the power output
Exhaust
Brake Maintenance with Superlube
Extend the life of your exhaust brake with Pacbrake’s
Superlube, a multi-purpose, heat resistant, synthetic lubricant
that penetrates and protects your exhaust brake. Using Superlube
on your exhaust brake reduces friction and wear, helps prevent
rust and corrosion and protects against binding or sticking.
This high quality lubricant can also be used for household,
hobby, fishing, marine, hunting and automotive applications.
With the engine off, apply a sufficient amount (4-5 drops) to
the highlighted locations shown on the above diagram. Once all
the points have been lubricated, cycle the exhaust brake manually
or electronically a few times to work the lubricant in. These
steps will ensure that the Pacbrake continues to function properly.
Click
here for the Material Safety Data Sheet
PACBRAKE'S
SWITCH-PAC
Designed specially for manual transmission vehicles, Pacbrake’s
Switch-Pac is a shifter-mounted ON/OFF switch. The convenient
fingertip control location provides easy access for exhaust
brake activation. The Switch-Pac can operate not only your vehicle's
exhaust brake, but other vehicle accessories such as Pacbrake's
air horns.
ECM
BYPASS SWITCH
Vehicles with an engine ECU (electronic control unit) experience a
2½ second delay when activating their exhaust brake circuit.
Pacbrake’s ECM Bypass kit eliminates this delay with bypassing
the computer system using a mechanical throttle switch mounted on
the accelerator linkage.
