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AVO Turbo Information
AVO Turbos
by AVO Turboworld
AVOTurboworld – For All Your Turbo Needs
Turbo speed (Hz)
Reduced Oil Flow
All AVO ball-bearing turbochargers are water-cooled and come
The ball bearing design reduces the required amount of oil
with the proper oil and water lines. Our turbochargers have been
required to provide adequate lubrication. This lower oil volume
designed to perform in the harshest conditions possible, and have
reduces the chance for seal leakage. Also, the ball bearing is more
been tested in them as well. AVO products are not designed to be as
tolerant of marginal lube conditions, and diminishes the possibility
reliable as OEM - they are designed to be much better than OEM.
of turbocharger failure on
High nickel content housings
engine shut down. Improved
ensure our turbos will go the
Speed response when throttle is suddenly opened
Rotor Dynamics and
distance.
at 2000 rpm (2liter S.I engine)
Durability Ball-bearing carAnother key performance
tridges offer much better
points is the Garrett® com2500
damping and control over
pressor and turbine wheels,
shaft motion, allowing
2000
which are lightweight with
enhanced reliability for both
knife-like edges for
1500
everyday and extreme driving
unmatched spooling, yet built
Ball Bearings
conditions. Too much shaft
strong for reliability. An AVO
1000
Sleeve Bearings
motion can lead to an early
ball-bearing turbocharger is
500
failure of the turbocharger,
likely to outlast your engine.
and is a leading cause of early
0
failure with journal bearing
True Ball-Bearing
-0.2
0
0.4
0.8
1.2
1.6
2
turbochargers. In addition, the
Time (s)
Turbochargers
opposed angular contact bearThanks to single-cartridge,
ing cartridge eliminates the
dual ball-bearing technology,
need for the thrust bearing - commonly a weak link in the turbo
Garrett® turbochargers generate far less frictional drag and are 10
bearing system.
times more durable than traditional journalbearing turbochargers.
New, efficient turbine stages deliver more power to your engine and
Water Cooling
allow ball bearing turbochargers to spool up faster than ever and
Following a hot shutdown of a turbocharger, heat soak begins.
have proven to be far more durable than journal bearing turThis
means that the heat radiating off the hot engine head, exhaust
bochargers.
manifold, and turbine housing finds it way to the center housing of
the turbo, raising its temperature. Extreme temperatures in the cenJournal Bearings vs. Ball Bearings
ter housing can result in oil coking, another cause of turbocharger
For a long time, journal bearings have been the standard technol- failure. To minimize the effects of heat soak-back, AVO only uses
ogy used within a turbocharger, dating from when turbochargers
water-cooled turbo center housings. These use coolant from the
were mainly used in diesel trucks. In the last few decades, turengine to act as a heat sink after engine shutdown, preventing the
bochargers are being used with increasing frequency within passen- oil from boiling and leaving deposits. The water lines utilize a therger cars, which operate over a longer rpm range and use smaller
mal siphon effect to reduce the peak heat soak-back temperatures
petrol motors. To address the needs of the modern automobile, ballafter you turn the car off. Please take care with the layout of the
bearing cartridges were designed to improve turbocharger response. pipes, which should minimize peaks and troughs with the (cool)
Expensive at first, it is now an affordable technology advancement
water inlet on the low side.
that provides significant performance improvements to the turbocharger. The ball bearing cartridge design is a single sleeve sysWastegate & Turbo Housings
tem that contains a set of angular contact ball bearings on either
The AVO380lgt turbo uses an internal wastegate design that is
end, whereas the traditional bearing system contains a set of jourbuilt
into the turbine housing, which consists of a “flapper” valve,
nal bearings and a thrust bearing.
crank arm, rod end, and pneumatic actuator. The AVO turbine housing is designed for maximum flow with an internally wastegated
Turbo Response
housing, as we run the largest wastegate swing valve possible to
When driving a vehicle with the cartridge ball bearing turreduce chances of boost creep in high horse power engines. The
bocharger, you will find exceptionally crisp and strong throttle
quality of the AVO turbine housing is far above the rest with thouresponse. Ball bearing turbochargers spool up 15% faster than tradi- sands of hours invested into R&D to insure our turbo housing pertional journal bearings. This produces an improved response that
formance. We only use the highest quality, high temperature castcan be converted to quicker 0-60 mph speed. And many AVO turing, which are machined on a 5-axis CNC machine to ensure we
bocharger users agree, with some feeling that it feels like they are
maintain the precise tolerances necessary for maximum performdriving a big, normally aspirated engine thanks to the incredible
ance and reliability.
increase in response and the linear delivery of power.
6
Sale Prices are Good Through March 30, 2007