This hybrid turbocharger is designed for to provide an air flow rate dsuitable for engine tuning, whilst retaining a plug & play -style installation. Depending on the chosen stage, its specification combines a high-flow MFS compressor wheel, a 360° thrust bearing and specific modifications to the wheels or housings.
Documented applications cover several versions Saab, 9,., 3 and 9,., 5 petrol, subject to verification of the part number originally fitted.
Available modifications — Stage 1, Stage 2 and Stage 3
Stage 1
Compressor wheel: MFS high-flow
Thrust bearing system: 360° thrust bearing
Balancing: High-speed balancing at 150,000 rpm on a Cimat VSR test bench
This configuration primarily affects the compression capacity and the dair flow rate on the intake side. Its operation must remain appropriate to the engine’s overall configuration.
Stage 2
Compressor impeller: MFS high-flow oversized
Intake d: Reprofiled for accommodate the new impeller oversized
Thrust bearing system: 360° thrust bearing
Balancing: High-speed balancing at 150,000 rpm on a Cimat VSR test bench
Reprofiling the housing enables it dto accommodate the compressor impeller oversized. This modification may alter the available flow rate and the compressor’s behaviour depending on operating conditions d.
Stage 3
Compressor impeller: MFS high-flow oversized
d’ intake housing: Reprofiled for to accommodate the new impeller oversized
Thrust bearing system: 360° thrust bearing
Turbine impeller: High-flow oversized
Turbine casing: Reprofiled for ly to accommodate the new impeller oversized
Balancing: High-speed balancing at 150,000 rpm on a Cimat VSR test bench
This modification is carried out on both the compressor and turbine sides. Larger dimensions may affect flow rate, response time and the operating range d; it must therefore be combined with appropriate engine tuning.
What is a hybrid turbo?
A hybrid turbo utilises a turbocharger architecture adapted for accommodate modified internal components. Depending on the stage, the tuning may involve the compressor wheel, the housings, the turbine wheel, the thrust bearing or balancing.
The aim is dto adapt the compression capacity and air flow rate d. However, a hybrid turbo is not defined solely by the appearance of its impeller: its geometry, housing and the overall balance of the unit are also crucial.
MFS compressor wheel: standard or Performance?
MFS stands for ‘Milled From Solid’ and refers to a wheel machined from a solid block. This manufacturing process alone does not guarantee an increase in airflow d. A standard MFS wheel may retain a geometry equivalent to that dof the original.
An MFS wheel Performance can be designed with a geometry tailored to the intended modification. For this product, the data shows a forged aluminium impeller that is lighter, larger and taller than the original d. A standard MFS impeller can be just as shiny as an MFS impeller Performance. It is not its appearance that determines its performance, but its geometry and its ability to move more dair.
Why does the geometry of the blades influence the air flow rate d?
The compressor impeller draws in and then compresses the air admitted by the engine. Its diameter, profile, height, width and blade arrangement influence its aerodynamic behaviour. A suitable geometry can move more dair under certain conditions, but the result also depends on the housings, the turbine, the boost pressure and the engine management system. A larger impeller therefore does not automatically guarantee better performance and may alter the response time.
Reliability and balancing of the hybrid turbocharger
The documented 360° thrust bearing distributes axial forces over a wide surface area. The rotor is balanced at high speed, up to 150,000 rpm on a Cimat VSR test bench, in order to minimise vibrations and mechanical stresses. However, this balancing does not compensate for incorrect installation or inadequate lubrication.
Engine remapping and preparation
The engine mapping must be adjusted for to make full use of the hybrid turbo’s characteristics. The pressure control systems, injection, exhaust and cooling systems must be checked or adjusted according to the modification. The wastegate must be adjusted when remapping the ECU. The transmission and other vehicle components must also remain suitable for the intended level of stress.
Turbo specifications
OEM part numbers
55559825
55560601
55561884
55564966
9172180
Manufacturer’s part numbers
49189-01800
49189-01810
49189-01820
49189-01830
49189-01850
Compatible vehicles and assignments
Saab
9.3 — 2.0 i — 205 hpFrom 1998 — end date unspecified
Engine code: not specified
9.3 — 2.3 i — 225 hpFrom 1998 — end date unspecified
Engine code: not specified
9.5 — 2.3 i — 230 hpFrom 1997 — end unspecified
Engine code: not specified
9.5 — 2.3i — 250 hpFrom 2001 — end unspecified
Engine code: unspecified
9.5 restyled — 2.3i — 260 hpFrom 2005 — end unspecified
Engine code: not specified
Additional technical specifications
Product type: Hybrid Turbo
Installation: Plug & play, no modifications to the mounting required
Documented engine variants: 2.0 i and 2.3i
Documented power ratings: 205, 225, 230, 250 and 260 hp
Installation advice
⚠️ WARNING — IMPORTANT BEFORE INSTALLATION
Identify and rectify the cause of the previous fault. Check the lubrication circuit, the oil supply and return lines d, and ensure the pipes are clean. Check the intake and ensure there are no foreign objects present. Prime the system in accordance with the applicable recommendations and follow the manufacturer’s instructions. A lubrication fault that is not rectified may lead to further turbocharger failure.
How do you identify the correct turbo?
Check the turbo’s part number d, the original OEM and manufacturer part numbers, as well as the make, model, version, engine type, power output,Year and engine code. An identical engine type does not always guarantee compatibility.
⚠️ Check your turbo’s part numbers
Before ordering, compare the part number marked on your original turbo d with the part numbers listed in this data sheet. An identical engine specification does not always guarantee compatibility.
If in doubt, please contact us with the part number found on your turbocharger.
