This hybrid turbocharger, designed for 2.8 TDI engines ranging from 125 to 158 hp, combines a ‘ plug & play ’ configuration with internal components adapted to the tuning package. Depending on the tuning package selected, the modifications include the high-flow MFS compressor wheel, the housings and, for the most advanced tuning package, the turbine section.
Documented specifications include, in particular, the Volkswagen LT2 and LT3 2.8 TDI 158 hp. The choice of tuning package must take into account the engine’s configuration, its intended use and any planned peripheral modifications.
Available configurations — 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 modification is carried out on the compressor impeller to d'adjust the compression capacity and the air flow rate d'air. The 360° thrust bearing helps to distribute the axial forces applied to the rotor more evenly.
Stage 2
Compressor impeller: MFS high-flow oversized
d ’ intake housing: re-profiled for accommodate the new impeller oversized
Bearing system: 360° bearing
Balancing: high-speed balancing at 150,000 rpm on a Cimat VSR test bench
The Stage 2 combines a oversized compressor wheel with a d intake housing, re-profiled. This modification is designed to adapt the air flow d to the new geometry, without prejudging the engine’s final power output.
Stage 3
Compressor wheel: MFS high-flow oversized
Intake housing d: re-profiled for to accommodate the new impeller oversized
Bearing stop system: 360° bearing stop
Turbine impeller: high-flow oversized
Turbine casing: re-profiled for ly to accommodate the new impeller oversized
Balancing: high-speed balancing at 150,000 rpm on a Cimat VSR test bench
This modification alters the compressor and turbine sides of the.. Larger sizing may increase flow capacity under certain conditions, but may also alter the response time and the optimal operating range.
What is a hybrid turbo?
A hybrid turbo retains an architecture suited to the original engine d whilst incorporating targeted internal modifications. Depending on the upgrade stage, these may involve the compressor wheel, the turbine wheel, the housings, the thrust bearing system and the balancing.
dThe aim is to adapt the compression capacity and air flow d. However, a hybrid turbo is not defined solely by the appearance of its wheel: the geometry of the components and their compatibility with the housings are crucial.
MFS compressor wheel: standard or Performance?
MFS stands for ‘Milled From Solid’, meaning 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 d of the original.
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 d'air. A Performance impeller can be given a profile or dimensions suited to the tuning objective, provided these modifications are in keeping with the rest of the turbocharger.
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 blade arrangement all influence its aerodynamic behaviour. The result also depends on the housings, the turbine section, the boost pressure and the engine management system. A larger impeller therefore does not automatically guarantee a better result under all conditions.
Reliability and balancing of the hybrid turbocharger
The 360° thrust bearing, documented across the three stages, distributes the axial forces around the bearing. The rotor benefits from d'high-speed balancing at 150,000 rpm on a Cimat VSR test bench to limit vibrations and mechanical stresses. However, this balancing does not compensate for incorrect installation or inadequate lubrication.
Engine remapping and preparation
Appropriate engine management is required for to make full use of the characteristics d'of a hybrid turbocharger. The mapping, boost pressure, fuel injection, exhaust and cooling must be checked or adjusted according to the level of tuning. The wastegate must be adjusted when remapping the ECU. The clutch, gearbox and other components under stress must also be checked depending on the vehicle.
Turbo part numbers
OEM part numbers
062145701A
062145701AV
062145701AX
90528201007103
9.0529.20.1.0071.04
9.0529.20.1.0071.02
Manufacturer reference
721204-1
Compatible vehicles and assignments
Volkswagen
LT2 — 2.8 TDI 158 hp
Engine type 2.8 TDI — from 1996, end date unspecified
Engine code : unspecified
LT3 — 2.8 TDI 158 hp
Engine 2.8 TDI — from 2003, end date unspecified
Engine code : unspecified
Additional technical specifications
Product type: turbo hybrid
Engine: 2-.-8 TDI
Power documented: 125 to 158 hp
Installation: plug & play configuration, no modifications to the mounting required
Engine code: not specified
Fitting 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 and ensure there are no foreign objects present. Carry out the priming procedure in accordance with the applicable recommendations and follow the manufacturer’s instructions.
A lubrication fault that is not rectified may result in the turbocharger failing again.
How do you identify the correct turbo?
Check the part number engraved on the original turbo d and compare it with the OEM and manufacturer part numbers in this fact sheet. Also check the make, model, generation, engine type, power output at hp, theYear and the engine code where available. 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 d turbocharger with the part numbers listed in this product sheet. An identical engine specification does not always guarantee compatibility.
If in doubt, contact our team with the full part number of your turbocharger.
