This GTA1749V hybrid turbocharger is designed for use with a range of engines Renault 1.9 dCi. Depending on the upgrade package chosen, the modification involves a high-flow MFS compressor wheel, a 360° bearing stop and internal modifications tailored to the purpose of the upgrade.
The documented assignments relate in particular to Renault Grand Scénic 2, Laguna 2 Phase 2, Mégane 2 and Scénic 2. Installation is designed to require no modifications to the mounting, provided that the correct part number and version for the vehicle are selected.
This preparation acts primarily on the compressor wheel’s ability to move air. Its final behaviour depends on the engine management system and all the vehicle’s components.
The wheel oversized requires a casing d're-profiled intake'. This combination is designed to adjust the airflow and compression, although it does not, on its own, guarantee a specific power output.
This course covers modifications to both the compressor and turbine sides. Oversizing can affect the flow rate d'air, conditions d'Optimal utilisation and response time of the turbocharger'.
A hybrid turbo is based on a specially adapted turbocharger design for to receive internal components that differ from the configuration d'origin'. Depending on the course, the preparation may involve the compressor wheel, the casings, the turbine wheel, the thrust bearing and balancing.
The aim is d'adjust the compression capacity and flow rate' d'air'. A hybrid turbo is not defined solely by the appearance of its impeller: the geometry, dimensions, machining of the housings and the overall balance are also crucial factors.
MFS stands for ‘Milled From Solid’, meaning a wheel machined from a solid block. This manufacturing process does not, on its own, guarantee an increase in throughput d'air'. A standard MFS wheel can retain a geometry equivalent to that d'origin'.
An MFS wheel Performance can be designed with a geometry suited to the preparation objective. A standard MFS wheel can be just as shiny as an MFS wheel Performance. It is not its appearance that determines its performance, but its geometry and its ability to move more d'air'. Higher power output can only be utilised effectively with appropriate engine tuning.
The compressor wheel draws in and then compresses the air fed to the engine. Its diameter, profile, height, width and the arrangement of the blades all influence its aerodynamic behaviour. The right geometry can move more d'air under certain conditions, but the result also depends on the casings, the turbine, the boost pressure and the mapping'. A larger wheel therefore does not automatically guarantee better performance and may affect response time.
The 360° stop, as documented in each module, distributes the axial forces around the axis. High-speed balancing at 150,000 rpm on a Cimat VSR test bench is designed to minimise vibrations and stresses in the rotor. However, it does not protect the turbocharger against a lack of lubrication, a foreign object or incorrect installation.
The engine management system needs to be adjusted for make the most of the hybrid turbo’s features. Mapping, boost pressure, fuel injection, exhaust and cooling must be monitored or adjusted according to the level of tuning. The wastegate must be adjusted when remapping the ECU. The clutch, gearbox and other components should also be checked, depending on the vehicle and how it is used.
⚠️ WARNING — IMPORTANT BEFORE ASSEMBLY
Before installation, identify and rectify the cause of the previous fault. Check the lubrication circuit, the supply and the return d'the oil and the cleanliness of all the pipes'. Check the intake and ensure there are no foreign objects present. Carry out the priming in accordance with the relevant guidelines and follow the manufacturer’s instructions. If a lubrication fault is not rectified, it may lead to the turbocharger failing again.
Check the reference number engraved on the turbo d'origin and compare it with the OEM and manufacturer part numbers listed on this sheet'. Also check the make, model, generation, engine type, power output, andYear the mounting code and the engine code, where available. Having the same motor does not always guarantee compatibility.
⚠️ Check your turbo’s part numbers
Before placing your order, Compare the part number on your turbocharger d'origin' using the references given in this fact sheet. Having the same motor does not always guarantee compatibility.
If in doubt, please contact us with the full turbo part number d'Vehicle origin and details'.
ALFI TURBO specialises in the sale of turbochargers for for cars, commercial vehicles, heavy goods vehicles, construction machinery, agricultural machinery and boats: new turbochargers, remanufactured units, hybrid turbochargers, Cartridge and turbocharger spare parts. Over 20,000 items are available.
The turbocharger plays a vital role in the operation and performance d of a turbocharged engine. When a turbocharger needs replacing, it is important d to identify the exact part number before ordering.
ALFI TURBO supplies turbochargers for for a wide range of makes and engine types: cars, commercial vehicles, heavy goods vehicles, construction machinery, tractors and agricultural machinery, as well as various marine applications.
You can search for your turbo based on the vehicle or application, engine type, engine code, or directly using d an OEM or manufacturer part number found on your old turbocharger.
Browse our range of new turbochargers for for diesel and petrol engines. ALFI TURBO has over 5,500 new turbochargers in stock for covering a wide range of makes, engine types and turbocharger part numbers.
View new turbochargers →A standard exchange turbo allows you to replace a turbocharger whilst returning the old part where a deposit is required. Our catalogue includes numerous part numbers for from various makes and engine types.
View standard exchange turbochargers →Hybrid turbos are designed for set-ups requiring greater air flow d and higher performance potential than a standard set-up. Specifications depend on the turbo, its tuning and the engine configuration.
View hybrid turbos →The turbo Cartridge, also known as the central turbo cartridge, comprises the main rotating components of the turbocharger. ALFI TURBO has over 6,000 Cartridge for turbo part numbers.
View turbo Cartridge →Our catalogue covers a wide range of d applications fitted with d a turbocharged engine.
A single engine type may have been fitted with several different turbochargers depending on theYear, power output, engine version or technical evolution.. The application alone is therefore not always sufficient for to accurately identify the correct turbo.
Before ordering, note down the part numbers shown on the identification plate d of your old turbocharger. This may be d an OEM part number or d a part number from the turbo manufacturer.
Compare these part numbers with those listed on our product pages.. If in doubt, our team can help you verify the part number you are looking for before you place your order.
A loss of power, an unusual whistling noise, oil consumption d, abnormal smoke or poor engine performance may be linked to a turbocharger fault.
However, a fault that appears to be turbo-related may also stem d from a lubrication issue, d from contaminated oil, d from a foreign object, from the intake or exhaust systems, or d from another engine peripheral component.
It is therefore important to investigate the cause of the fault before fitting a new turbo or a new Cartridge.
Since 2012, ALFI TURBO has been assisting private individuals and professionals in identifying and replacing turbochargers.
A turbocharger failure may be the result d of another engine problem. Before fitting d a new turbo or Cartridge, identify and rectify the cause of the original fault to d avoid d damaging the new part.
Do you have a turbocharger part number but can’t find the matching part? Are you unsure which part number to choose? Send us the details from your old turbo so that our team can help you identify the part you’re looking for.
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