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| Owen Developments have
been appointed as the only
official Garrett Performance
Centre in the UK. Having
direct access to all technical
data and drawings enables
us to apply the GT range
of duel ball bearing turbos
with the ultimate in matching
efficiency. |
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The current range of turbochargers,
cater for power outputs of 150
bhp to well over 1,000 bhp with
externally wastegated turbine
housings. Hybrid
turbocharger combinations
are a regular requirement of motorsport and fast road use vehicles, therefore
with the full support of sophisticated
machine shop, many specials have
been successfully produced, for
example the new Mitsubishi
Evo MR 400 bhp limited edition vehicle which has stunned the
motoring press with its shear
power but retained driveability.
Advantages of the Garrett GT turbocharger
is its ability to withstand high
levels of boost pressure without
rapid axial wear, quick spool
up giving instant throttle response,
is another of its major advantages.
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Dual Ball Bearing
GT28 Turbo assembly
with internal wastegate
assembly. .
64ar turbine with
5 bolt exit. Very
very Good response
turbo for 4 Cyl applications.
This turbo has a flow
capacity of about
280HP.
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Compressor |
Turbine |
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| Turbo |
CHRA |
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Dia Trim A/R |
Wh
Dia Trim A/R |
| 466541-1 |
446179-12 |
60mm
60 0.60 |
53mm
62 0.64 |
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Watercooled CHRA |
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Compressor |
Turbine |
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| Turbo |
CHRA |
Wh
Dia Trim A/R |
Wh
Dia Trim A/R |
| 739548-1 |
446179-66 |
60mm 62 0.60 |
53.8mm 76 0.86 |
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Watercooled CHRA |
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Powershift
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Horsepower
Displacement |
250 - 320
1.8L - 2.7L |
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Supports up to 600
hp. Compressor: 82
mm, 56 Trim, 0.70
A/R. Dual ball bearings
allow for higher efficiency
and much faster spool
up.
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Compressor |
Turbine |
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| Turbo |
CHRA |
Wh
Dia Trim A/R |
Wh
Dia Trim A/R |
| 714568-1 |
706451-5 |
82mm 56 0.70 |
68mm 84 1.06 |
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Watercooled CHRA |
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| *all prices shown in the cart exclude VAT |
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Improved
Efficiency
New,
efficient turbine stages deliver more
power to your engine and allow Garrett
turbochargers to spool up faster than
ever. Our engineers have eliminated
old efficiency killers, including on-center
turbine housings, clipped turbine wheels,
and antiquated aerodynamics with the
new GT product line.
Increased Boost
Capacity
Our
performance turbochargers feature compressor
wheels that can handle a higher boost
presure.
So go ahead - increase the PSI. Your
Garrett turbocharger can handle it.
True Ball-Bearing
Turbochargers
Thanks
to our single-cartridge, dual ball-bearing
technology, Garrett turbochargers generate
far less frictional drag and are 10
times more durable than traditional
journal-bearing turbochargers. While
first developed for racing, over 100,000
ball-bearing turbos have been produced
for OE applications, and are now available
in a range of sizes for the street.
Proven
Durability
Our
engineering team puts our turbochargers
through more than 20 durability and
performance tests befor they reach consumers.
We produce more than 7 million turbos
each year. Rest assured that a Garrett
turbo is a dependable one.
Turbine
Maps
1.
Turbine Expansion Ratio
The
degree of exhaust expansion as it passes
through the turbine.
2. Turbine
Corrected Flow
The
turbine flow is also corrected for temperature
and pressure at the turbine inlet (exhaust
manifold).
Compressor
Maps
1. Pressure Ratio
Ratio
of ABSOLUTE outlet pressure divided
by ABSOLUTE inlet pressure.
2. Corrected
Airflow
Represents
the corrected mass flow rate of air,
taking into account air density (ambient
temperature and pressure).
3. Efficiency
Contours
The
efficiency contours depict the regional
efficiency of the compressor set. This
efficiency is simply the percentage
of turbo shaft power that converts to
actual air compression. When sizing
a turbo, it is important to maintain
the proposed lugline with a high efficiency
range on the map.
4.
Surge Line
The
surge region, located on the left-hand
side of the compressor map, is an area
of flow instability typically caused
by compressor inducer stall. The turbo
should be sized so that the engine does
not operate in the surge range. When
turbochargers operate in surge for long
periods of time, bearing failures may
occur.
5.
Choke Line
The
choke line is on the right hand side
of the compressor map and represents
the flow limit. When a turbocharger
is run deep into choke, turbo speeds
will increase dramatically while compressor
efficiency will plunge (very high compressor
outlet temps), and turbo durability
will be compromised.
It's All
About Better Combustion
Before
you can truly appreciate what a turbocharger
does for an engine, you need to understand
the basics of internal combustion.
Internal combustion engines are "breathing"
engines. That is to say, they draw in
air and fuel for energy. This energy
is realized as power when the air-fuel
mixture is ignited. Afterward, the waste
created by the combustion is expelled.
All of this is typically accomplished
in four strokes of the pistons.
What a turbocharger does is to make
the air-fuel mixture more combustible
by fitting more air into the engine's
chambers which, in turn, creates more
power and torque when the piston is
forced downward by the resulting explosion.
It accomplishes this task by condensing,
or compressing, the air molecules so
that the air the engine draws in is
denser. Now, how it does that is the
real story here.
Not As Easy
As It Looks
The
basic principal behind turbocharging
is fairly simple, but a turbocharger
is a very complex piece of machinery.
Not only must the components within
the turbocharger itself be precisely
coordinated, but the turbocharger and
the engine it services must also be
exactly matched. If they're not, engine
inefficiency and even damage can be
the results. That's why it's important
to follow correct installation, operating
and preventative maintenance procedures.
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