Will the PowerMax MGT1446Z Turbocharger fit my Fiat 500 Abarth?

Garrett lists it for the 2009-2023 Fiat 500 Abarth with the 1.4L four-cylinder, as the replacement for factory turbo 55275806, which is Garrett part 812812-5006S. It is a complete assembly built to the original footprint. The non-Abarth Fiat 500 models are not on the Garrett application list.

How much power will it support?

Garrett states that the PowerMax MGT1446Z Turbocharger supports up to 250 horsepower, or 186 kW, based on laboratory compressor flow testing that represents the total capability of the turbo. It is not a measured result on an Abarth. What a car makes depends on its supporting modifications, fuel and the ECU calibration.

Garrett advises that the ECU may need calibrating, depending on the setup and the performance goal. The 26 percent extra compressor flow of the PowerMax MGT1446Z Turbocharger only becomes power when the calibration asks for more boost and fuel. On factory software the car drives much as before, with the new turbo working well inside its range.

Is installation a straight swap?

Yes. Garrett engineers the turbo to match the original footprint, so it reuses the factory mounting locations, oil and coolant connections and the intake and exhaust interfaces, and Garrett describes it as bolt-on with no fabrication. The actuator arrives calibrated, so there is no setup of the wastegate on the car.

Should I fit a speed sensor?

Garrett recommends monitoring turbo shaft speed to help prevent overspeed and protect durability, particularly on a car running higher boost. The compressor housing has a machined port for the G-Smart Bluetooth module 923586-0002 or speed sensor kits 781328-0001 with gauge and 781328-0002 without. Garrett publishes no maximum speed figure for this turbo.

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Description

Garrett PowerMax MGT1446Z Turbocharger for 2009-2023 Fiat 500 Abarth 1.4L

Garrett’s PowerMax MGT1446Z Turbocharger is a direct-fit upgrade for the 1.4L four-cylinder in the 2009-2023 Fiat 500 Abarth, built to replace the factory turbo that Garrett itself supplied, Fiat part 55275806 (Garrett 812812-5006S). Garrett quotes 26 percent more compressor flow than the original and a capability of up to 250 horsepower from laboratory flow testing. That suits an Abarth owner with a calibration and supporting parts who has reached the limit of the stock turbo, while keeping factory drivability. On an otherwise stock car it is a high-quality replacement with headroom the engine will not use until the calibration changes.

Fit and Monitoring

The turbo comes as a complete assembly with a calibrated actuator and matches the original footprint, so the factory mounting locations, oil and coolant connections and intake and exhaust interfaces are reused without fabrication. Garrett machines a turbo speed sensor port into the compressor housing and recommends monitoring shaft speed to help prevent overspeed and protect long-term durability.

Features

Bolt-on replacement for the factory Abarth turbocharger, Fiat 55275806
26 percent more compressor flow than the original turbo
Complete assembly with a calibrated actuator
Fully machined speed sensor port; sensor sold separately

Specifications

Garrett turbo model: MGT1446Z
Compressor inducer and exducer: 36.2mm and 46mm
Turbine inducer and exducer: 39mm and 34mm
Compressor flow over factory: 26 percent more
Garrett power capability: Up to 250 horsepower (186 kW)
Replaces: Fiat 55275806, Garrett 812812-5006S

Applications

Garrett lists the PowerMax MGT1446Z Turbocharger for:

Fiat 500 Abarth: 2009-2023 | 1.4L I4

Notes

Speed sensor options are the G-Smart module 923586-0002 or sensor kits 781328-0001 and 781328-0002, sold separately; see Garrett speed sensor kits
Garrett recommends monitoring turbocharger shaft speed to help prevent overspeed
Garrett notes that ECU calibration may be required depending on the setup and performance goals
The 250 horsepower figure comes from laboratory compressor flow testing; results on the car depend on configuration, modifications and tuning

Frequently Asked Questions

Will the PowerMax MGT1446Z Turbocharger fit my Fiat 500 Abarth? Garrett lists it for the 2009-2023 Fiat 500 Abarth with the 1.4L four-cylinder, as the replacement for factory turbo 55275806, which is Garrett part 812812-5006S. It is a complete assembly built to the original footprint. The non-Abarth Fiat 500 models are not on the Garrett application list.
How much power will it support? Garrett states that the PowerMax MGT1446Z Turbocharger supports up to 250 horsepower, or 186 kW, based on laboratory compressor flow testing that represents the total capability of the turbo. It is not a measured result on an Abarth. What a car makes depends on its supporting modifications, fuel and the ECU calibration.
Do I need a tune? Garrett advises that the ECU may need calibrating, depending on the setup and the performance goal. The 26 percent extra compressor flow of the PowerMax MGT1446Z Turbocharger only becomes power when the calibration asks for more boost and fuel. On factory software the car drives much as before, with the new turbo working well inside its range.
Is installation a straight swap? Yes. Garrett engineers the turbo to match the original footprint, so it reuses the factory mounting locations, oil and coolant connections and the intake and exhaust interfaces, and Garrett describes it as bolt-on with no fabrication. The actuator arrives calibrated, so there is no setup of the wastegate on the car.
Should I fit a speed sensor? Garrett recommends monitoring turbo shaft speed to help prevent overspeed and protect durability, particularly on a car running higher boost. The compressor housing has a machined port for the G-Smart Bluetooth module 923586-0002 or speed sensor kits 781328-0001 with gauge and 781328-0002 without. Garrett publishes no maximum speed figure for this turbo.

About Garrett

Garrett Motion has turbocharged engines since 1955, when its T15 was matched to the Caterpillar D9 crawler, and in 1962 a Garrett turbocharger went into the Oldsmobile Jetfire Turbo Rocket, the first turbocharged production car. Garrett has supplied turbocharging in Formula 1 with Scuderia Ferrari, the FIA World Rally Championship and the 24 Hours of Le Mans. It has operated as a stand-alone company since 2018, and its technology is fitted to around 150 million vehicles worldwide.

Additional Information

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BP Pricing Difference

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Garrett PowerMax MGT1446Z Turbocharger for 2009-2023 Fiat 500 Abarth 1.4L [953223-5001S]

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Garrett PowerMax MGT1446Z Turbocharger for 2009-2023 Fiat 500 Abarth 1.4L

Fit and Monitoring

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

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