line
divider Home divider Profile divider Technical Support divider Latest News divider Contact divider Terms divider Privacy divider Returns divider Site Map
line
Owen Developments
Garrett Performance Centre divider Garrett WRC divider Prodrive Centre divider MoTec ECU & Turbo Centre
shadow
Garrett Competition Turbochargers title bar
spacer spacer
spacer
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. The Garrett Performance Centre for Europe, Africa and the Middle East

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.

spacer
line
spacer
Garrett GT28 Ball-Bearing Turbocharger title bar
spacer spacer

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.

Garrett GT 28 Ball-Bearing turbocharger


Garrett GT 28 Ball-Bearing Turbocharger
spacer spacer spacer
GT28 60mm, 60 trim, 0.60 A/R
GT28 Pressure Ratio
Corrected Air Flow (lbs/min)
spacer
spacer spacer  
spacer
Powershift

spacer
Horsepower
Displacement
200 - 280
1.6L - 2.5L
 
    spacer
spacer
GT28 Turbine Flow
spacer
spacer    
spacer Compressor Turbine
spacer spacer spacer spacer
Turbo CHRA Wh Dia Trim A/R Wh Dia Trim A/R
466541-1 446179-12 60mm 60 0.60 53mm 62 0.64
  spacer    

Watercooled CHRA
back to the top of the page
spacer
line
spacer
Garrett GT28RS Disco Potato Turbocharger title bar
spacer spacer

Dual Ball Bearing GT28RS turbo assembly with T25 style turbine inlet. Comes with internal wastegate pre-assembled.

Garrett GT 28RS Disco Potato



This turbo is great for small displacement engines up to 2.2L and has the ultimate spool up time compared to other units. This turbo has a flow capacity of about 320HP.
spacer spacer spacer
GT28RS 60mm, 62 trim, 0.6 A/R
GT28R Pressure Ratio
Corrected Air Flow (lbs/min)
spacer
spacer    
spacer Compressor Turbine
spacer spacer spacer spacer
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
  spacer    

Watercooled CHRA
spacer
Garrett GT 28RS Disco Potato
GT28R Turbine Flow

spacer spacer  
spacer
Powershift

spacer
Horsepower
Displacement
250 - 320
1.8L - 2.7L
 
    spacer
back to the top of the page
spacer
line
spacer
Garrett GT35R title bar
spacer spacer

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.


Garrett GT 35R


Garrett GT 35R



Garrett GT 35R
spacer spacer spacer
GT28R 60mm, 60 trim, 0.60 A/R
GT35R Map
Corrected Air Flow (lbs/min)
spacer
spacer spacer  
spacer
Powershift

spacer
Horsepower
Displacement
400 - 600
3.0L - 4.5L
 
    spacer
spacer
GT35R Turbine Flow
spacer
spacer    
spacer Compressor Turbine
spacer spacer spacer spacer
Turbo CHRA Wh Dia Trim A/R Wh Dia Trim A/R
714568-1 706451-5 82mm 56 0.70 68mm 84 1.06
  spacer    

Watercooled CHRA
back to the top of the page
spacer
line
line
Your Shopping Cart
Your Shopping Cart
Shipping Box
cart symbol



Your cart is empty
*all prices shown in the cart exclude VAT
line
view cart
spacer
checkout
we accept payment by most major credit and debit cards
Other Garrett pages
spacer
bullet Garrett Performance Centre arrow
line
bullet Garrett WRC Turbo Centre arrow
line
bullet Buy Garrett Turbos online arrow
line
bullet Turbocharger Products arrow
line
bullet Performance Tuning Products arrow
line
bullet The Larger Charger Custom Shop arrow
line
bullet Turbosmart Products arrow
line
Garrett Products - top three
bullet Owen Subaru 475+ bhp Garrett Ball BearingTurbo
Designed and developed by Owen Developments. It is an increased volume cast turbine housing with solid billet inconel wastegate...
Owen Subaru 475+ bhp Garrett Ball BearingTurbo
more info
line
bullet Owen Subaru 400+ bhp Garrett Ball Bearing Turbo
Designed and developed by Owen Developments. It has a cast turbine housing, with solid billet inconel wastegate assembly which...
Owen Subaru 400+ bhp Garrett Ball Bearing Turbo
more info
line
bullet Owens Evo/Garrett External Wastegate Turbo Kit 500 bhp+
Developed from the 450 bhp kit, the manifold fits the GT30/35 external wastegate turbos as is used by ourselves in our Evo...
Owens Evo/Garrett External Wastegate Turbo Kit 500 bhp+
more info
line
Garrett Main Features

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.

Turbine Expansion Ratio

2. Turbine Corrected Flow
The turbine flow is also corrected for temperature and pressure at the turbine inlet (exhaust manifold).

Turbine Corrected Flow



Compressor Maps

1. Pressure Ratio
Ratio of ABSOLUTE outlet pressure divided by ABSOLUTE inlet pressure.

Pressure Ratio

2. Corrected Airflow
Represents the corrected mass flow rate of air, taking into account air density (ambient temperature and pressure).

Corrected Airflow

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.

line
spacer                            
The Garrett Performance Centre for Europe, Africa and the Middle East spacer Prodrive Authorised Supplier spacer Motec ECU and Turbo Performance Centre spacer ASNU spacer Revo Engine Management Systems spacer HKS Engine Management Systems spacer UK and European Distributor for Murray Corp. spacer Buy Turbosmart products online
line
Home | About | Technical Support | Latest News | Contacts | Shop | Terms | Privacy | Returns © Copyright, Owen Developments Ltd 2006