When is the 0.92 A/R G25-585 G-Series II Turbocharger the right pick?

Choose this G25-585 G-Series II Turbocharger for a larger engine in the 1.4L to 3.0L range, or a smaller one that revs high and makes its power late. The 0.92 A/R housing keeps exhaust back pressure down at high rpm. A street engine that needs boost low in the rev range is better served by the 0.72 A/R.

How much power is the G25-585 rated to support?

Garrett rates it at 300 to 585 horsepower. The rating comes from compressor choke flow and represents potential flywheel horsepower, and the 0.92 A/R housing is the configuration best placed to approach the upper end, given enough fuel, boost and a calibration built for this turbocharger.

How does Garrett test G-Series II turbos?

Garrett states that each G-Series II design goes through burst containment testing, 1,000-hour engine durability cycles and 500-hour gas stand runs, along with thermal, fatigue, vibration and bearing tests. Rotating assemblies are high-speed balanced. The turbine wheel is Mar-M alloy rated to 1050 degrees Celsius.

Can I run an external wastegate with this turbo?

Not with this housing. This part number uses an internal wastegate turbine housing with a calibrated actuator. Garrett sells separate free-float G25 turbine housings in 0.72 and 0.92 A/R for external wastegate builds, which fit the G25-585 super core instead of this complete turbocharger.

Will this unit work on a twin-turbo engine?

Only as the standard rotation half of a pair. A mirrored twin-turbo layout needs one standard and one reverse rotation turbocharger, and Garrett builds a matching 0.92 A/R reverse rotation G25-585. Two of these standard units suit a twin layout only where both turbochargers turn the same way.

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Description

Garrett G25-585 G-Series II Turbocharger, 0.92 A/R V-Band Internal Wastegate

Garrett’s G25-585 G-Series II Turbocharger with the 0.92 A/R housing is the high-flow end of the standard rotation G25-585 range, built with V-band turbine inlet and outlet and an internal wastegate on a 0.5 bar actuator. The large housing lowers exhaust back pressure at high rpm, which suits a 2.5L to 3.0L engine or a high revving four-cylinder pushing toward Garrett’s 585 horsepower rating. On a small engine that lives below 6,000 rpm the 0.92 A/R will feel lazy, and the 0.72 or 0.49 versions make more sense.

Why G-Series II

Garrett redesigned the compressor aerodynamics for G-Series II and quotes up to 10 percent more compressor flow than the first generation at peak pressure ratio and peak turbo speed, along with higher efficiency at high flow rates. The housings are unchanged from the first generation, so G25 plumbing designed for the earlier turbo still lines up.

Features

Largest G25-585 turbine housing, for engines that need flow at high rpm
V-band joints at both ends of the turbine housing
Assembled and calibrated by Garrett, with the 0.5 bar actuator already set

Specifications

Garrett turbo reference: 4849
Compressor inducer and exducer: 48mm and 60mm
Turbine inducer and exducer: 54mm and 49mm
Turbine housing: 0.92 A/R, V-band inlet and outlet
Wastegate actuator: 0.5 bar
Maximum turbocharger speed: 185,000 rpm
Rotation: Standard

What’s Included

G25-585 G-Series II turbocharger with 0.92 A/R internal wastegate housing and actuator
Oil restrictor and water fittings

Applications

The G25-585 G-Series II Turbocharger is not vehicle specific. Garrett sizes it by engine and output:

Engine displacement: 1.4L to 3.0L
Power range: 300 to 585 horsepower (Garrett rating)

Notes

Smaller 0.49 and 0.72 A/R versions and reverse rotation G25-585 turbos are also available
The Garrett speed sensor kit is sold separately
Garrett states that running above 185,000 rpm is at the owner’s risk and can cause damage and premature failure
Expect boost to arrive later than with the smaller G25-585 housings

Frequently Asked Questions

When is the 0.92 A/R G25-585 G-Series II Turbocharger the right pick? Choose this G25-585 G-Series II Turbocharger for a larger engine in the 1.4L to 3.0L range, or a smaller one that revs high and makes its power late. The 0.92 A/R housing keeps exhaust back pressure down at high rpm. A street engine that needs boost low in the rev range is better served by the 0.72 A/R.
How much power is the G25-585 rated to support? Garrett rates it at 300 to 585 horsepower. The rating comes from compressor choke flow and represents potential flywheel horsepower, and the 0.92 A/R housing is the configuration best placed to approach the upper end, given enough fuel, boost and a calibration built for this turbocharger.
How does Garrett test G-Series II turbos? Garrett states that each G-Series II design goes through burst containment testing, 1,000-hour engine durability cycles and 500-hour gas stand runs, along with thermal, fatigue, vibration and bearing tests. Rotating assemblies are high-speed balanced. The turbine wheel is Mar-M alloy rated to 1050 degrees Celsius.
Can I run an external wastegate with this turbo? Not with this housing. This part number uses an internal wastegate turbine housing with a calibrated actuator. Garrett sells separate free-float G25 turbine housings in 0.72 and 0.92 A/R for external wastegate builds, which fit the G25-585 super core instead of this complete turbocharger.
Will this unit work on a twin-turbo engine? Only as the standard rotation half of a pair. A mirrored twin-turbo layout needs one standard and one reverse rotation turbocharger, and Garrett builds a matching 0.92 A/R reverse rotation G25-585. Two of these standard units suit a twin layout only where both turbochargers turn the same way.

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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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Garrett G25-585 G-Series II Turbocharger, 0.92 A/R V-Band Internal Wastegate [934076-5003S]

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Garrett G25-585 G-Series II Turbocharger, 0.92 A/R V-Band Internal Wastegate

Why G-Series II

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews