This hybrid turbo is designed for tuning the Volkswagen Transporter T4 1.9 TD. Its design allows for Installation without modification, whilst its internal components are adapted according to the selected tuning stage in order to increase the compression ratio and dair flow.
The configurations on offer combine a high-flow MFS compressor impeller, a 360° bearing stop and high-speed balancing. To make the most of these features, a consistent and correctly adjusted motor configuration is required.
Available configurations — Stage 1, Stage 2 and Stage 2+
Stage 1
Compressor wheel: MFS high-flow
Bearing: 360° thrust
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench
This design is based on an MFS compressor impeller designed for to vary the air flow rate dwhilst maintaining a configuration suitable for Installation without modification. The 360° thrust bearing helps to distribute the rotor’s axial forces.
Stage 2
Compressor impeller: MFS high-flow oversized
d’ intake casing: re-profiled for to accommodate the new impeller oversized
Bearing: 360° thrust bearing
Balancing: high-speed balancing at 150,000 rpm on a Cimat VSR test bench
The Stage 2 combines an MFS impeller oversized with a reprofiled intake housing d. This mechanical modification ensures dthat the impeller fits correctly and can increase the air flow capacity dunder the conditions specified by the engine tuning.
Stage 2+
Compressor impeller: MFS high-flow oversized
d’ intake housing: re-profiled for to accommodate the new impeller oversized
Bearing: 360° thrust bearing
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench
The documented mechanical specifications for for the Stage 2+ also include an MFS impeller oversized and the re-profiling of the intake housing d. The choice of upgrade package must be made according to the vehicle’s complete configuration and the tuning objectives.
What is a hybrid turbo?
A hybrid turbo utilises a turbocharger architecture designed for to accommodate internal modifications. Depending on the tuning, these may involve the compressor wheel, its dimensions and geometry, the housings, the turbine wheel, the thrust bearing system or even balancing.
The aim is dto adapt the compression capacity and air flow d. However, a hybrid turbo is not defined solely by the appearance of its impeller: the consistency between the components, the machining and the engine tuning determines its performance.
MFS compressor wheel: standard or Performance?
MFS stands for ‘Milled From Solid’, meaning a wheel machined from a solid block. This technology primarily describes a manufacturing process: it does not, on its own, guarantee an increase in air flow d.
A standard MFS impeller may retain a geometry equivalent to that of the original d. An MFS ‘ Performance ’ impeller may feature a profile, dimensions or blade configuration tailored to the tuning objective. On this product, the wheel shown is made of forged aluminium; it is lighter, larger and taller than the original d, with a claimed 15 per cent higher compression capacity.
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 higher airflow can contribute to power output only when combined with appropriate engine tuning.
Why does the geometry of the blades influence the air flow rate d?
The compressor impeller draws in and then compresses the air sent to the engine. Its diameter, profile, height, width and the arrangement of its blades directly influence its aerodynamic behaviour and the amount dof air it can move under certain conditions.
The result also depends on the compressor housing, the impeller and the turbine housing, the boost pressure and the engine set-up. A larger impeller does not automatically guarantee better performance and may alter the response time as well as the range dof optimal operation.
Reliability and balancing of the hybrid turbo
The 360° thrust bearing, documented across the three stages, distributes axial forces over a wide surface area. It contributes to the mechanical integrity of the assembly, without making the turbocharger immune to faults in assembly, lubrication or adjustment.
The rotor is balanced at high speed, up to 150,000 rpm, on a Cimat VSR test bench. This process aims to minimise vibrations and mechanical stresses when the turbocharger is operating at high revs.
Engine remapping and preparation
The engine management system must be adapted for to make full use of the hybrid turbo’s characteristics. The mapping, boost pressure and wastegate settings must be checked during reprogramming. Depending on the level of tuning, the fuel injection, exhaust, cooling, intake and transmission may also require checking or adjustment. Fitting da hybrid turbo alone does not guarantee a power gain.
Turbo part numbers
OEM part numbers
028145701L
028145701LV
028145701LX
Manufacturer part numbers
454064-2
454064-1
Documented accuracy: fitted from chassis number -T-200001.
Compatible vehicles and applications
Volkswagen
Transporter T4 — 1.9 TD –68 hp
Engine variants 1.9 TD — from 1990, end date unspecified
Engine code: unspecified
Documented allocation from chassis number -T-200001.
Additional technical specifications
Product type: turbo hybrid
Engine: 1,.,9 TD
displacement: 1,..9 l
Power as stated in the title: 68/75 hp
Documented period: from 1990
Installation: no modifications required
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 das well as the cleanliness of all pipes.
Check the inlet and ensure that no foreign objects can reach the compressor. Carry out priming in accordance with the applicable recommendations and follow the manufacturer’s instructions.
A lubrication fault that is not rectified may lead to further damage to the turbocharger.
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, generation, engine type, power output at hp, the period of fitment, the chassis number and the engine code where available. An identical engine specification 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 specification sheet. An identical engine specification does not always guarantee compatibility.
If in doubt, please contact us with the full part number of your original turbo dand your vehicle details.
