This hybrid turbo for, designed for the 2.7 engine (250 hp ), features d an internal modification designed to adapt the d air flow and the. compression capacity. Depending on the upgrade package chosen, it includes a high-flow MFS compressor wheel, a 360° thrust bearing and modifications to the casings or the turbine section.
Documented applications include the Audi A6 and Allroad models listed below. Installation is advertised as plug & play, subject to precise verification of the original turbo’s part numbers d.
Available upgrades — Stage 1, Stage 2 and Stage 3
Stage 1
Compressor wheel: MFS high-flow
Thrustbearing: 360°
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench
This modification primarily affects the compressor impeller in order d to adapt the air flow rate d whilst maintaining a configuration designed for for a Installation without modification.
Stage 2
Compressor impeller: MFS high-flow oversized
Intake casing d: re-profiled for accommodate the new impeller oversized
Thrustbearing: 360°
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench
The reprofiling of the casing allows d to adapt the housing to the compressor impeller oversized. This modification may alter the air displacement capacity and the compressor’s behaviour depending on the associated engine settings.
Stage 3
Compressor impeller: MFS high-flow oversized
d intake housing: re-profiled for to accommodate the new impeller oversized
Thrustbearing: 360°
Turbine impeller: high flow oversized
Turbine casing: reprofiled for ly to accommodate the new impeller oversized
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench
This modification package combines changes to both the compressor and turbine sides. The sizing of the impellers and the re-profiling of the housings can influence air flow d, back pressure and response time; the result depends on the overall engine set-up.
What is a hybrid turbo?
A hybrid turbo utilises a turbocharger architecture adapted for accommodate modified internal components. Depending on the upgrade package, the modifications may involve the compressor wheel, the turbine wheel, the housings, the thrust bearing and balancing.
The aim is d to adapt the compression capacity and air flow rate d. However, a hybrid turbo is not defined solely by the appearance of its impeller: the dimensions, geometry, machining of the housings and the overall coherence of the assembly are crucial.
MFS compressor wheel: standard or ‘ Performance ’?
MFS stands for ‘Milled From Solid’, meaning a wheel machined from a solid block. This designation describes a manufacturing process and does not, in itself, guarantee an increase in airflow d'. The impeller documented here is made of forged aluminium and features a lighter, larger and taller design than the d'original. The product data indicates an additional 15 per cent compression.
A standard MFS wheel can retain a geometry equivalent to the original. An MFS wheel Performance may adopt a profile, dimensions or blade configuration suited to the tuning objective, provided these modifications are specified.
A standard MFS impeller can be just as polished as an MFS impeller Performance. It is not its appearance that determines its performance, but its geometry and its ability to move more d air. A higher airflow rate can contribute to power output with appropriate engine tuning, though it does not in itself guarantee a gain.
Why does the geometry of the blades influence the air flow rate d?
The compressor wheel draws in and then compresses the air admitted by the engine. Its diameter, profile, height, width and the arrangement of its blades influence its aerodynamic behaviour. A suitable geometry can move more d air under certain conditions, but the result also depends on the housings, the turbine wheel, the boost pressure and the mapping. A larger wheel therefore does not automatically guarantee better performance and may affect response time.
Reliability and balancing of the hybrid turbo
The documented 360° thrust bearing distributes axial forces over a wide surface area. High-speed balancing at 150,000 rpm on a Cimat VSR test bench aims to limit vibrations and stresses on the rotor. However, it does not compensate for a lack of lubrication, nor the presence d of a foreign object, nor incorrect installation.
Engine remapping and preparation
Appropriate engine management is required for to make the most of this hybrid turbo’s characteristics. The mapping, boost pressure, fuel injection, exhaust and cooling must be checked or adjusted according to the configuration. The wastegate must be adjusted when the ECU is remapped. The transmission and other vehicle components must also be checked depending on the level of tuning.
Turbo part numbers
OEM Reference
078145704Q
Manufacturer’s part numbers
53039700070
53039800070
53039880070
53039900070
K03-070
Compatible vehicles and assignments
Audi
A6 2.7 TDI — 250 hp
Engine variants 2.7 TDI — from 2000, end dateunspecified
Engine code : unspecified
Allroad 2.7 i — 250 hp
Engine variants: 2.7 i — from 2000, end date unspecified
Engine code : unspecified
Additional technical specifications
Product type: turbo hybrid
Engine variants: 2-.7 TDI / 2-.7T / 2-.7i depending on the documented application
displacement: 2.7 L
Power: 250 hp
Documented period: from 2000, end unspecified
Installation: plug & play, without modification
Installation advice
⚠️ WARNING — IMPORTANT BEFORE INSTALLATION
Before installation, identify and rectify the cause of the previous fault. Check the lubrication circuit, the oil supply and return d as well as the cleanliness of all pipes.
Check the inlet for any foreign objects. Prime the system in accordance with the applicable guidelines and follow the manufacturer’s instructions.
A lubrication fault that is not rectified may lead to the turbocharger failing again.
How do you identify the correct turbo?
Check the part number engraved or marked on the original turbo d, then compare it with the OEM and manufacturer part numbers in this data sheet.. Also check the make, model, body style, engine type, power output (250 hp), installation period and engine code where available. An identical engine type is not always sufficient to confirm 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 full part number taken from your turbocharger.
