Is the 1.01 A/R G30-825 G-Series II Turbocharger right for a street engine?

Only if the engine is large or revs high. The 1.01 A/R housing on this G30-825 G-Series II Turbocharger favors flow near redline, so boost comes in later. For a street engine used mostly at low and medium rpm, the 0.83 A/R version gives better response with the same compressor.

How much power can the G30-825 make with this housing?

Garrett rates the G30-825 at 475 to 825 horsepower, calculated from compressor choke flow as potential flywheel horsepower. The 1.01 A/R housing gives an engine the best route toward the top of that range, provided fuel, intercooling and calibration are built to match.

Should I choose the G30-825 or the G30-900?

The G30-825 is G-Series II with a 58mm compressor and a 475 to 825 horsepower rating. The first-generation G30-900 has a 62mm compressor rated 550 to 900 horsepower. Choose the G30-825 for a wider operating range, and the G30-900 only when the target is clearly above 800 horsepower.

Can I fit an external wastegate instead?

Not to this housing, which is internally wastegated. Garrett offers the G30-825 as a super core and sells free-float G30 turbine housings in V-band, T3 and divided T4 inlets for external wastegate builds. Those are a separate purchase from this complete turbocharger.

What do I need besides the turbo?

Garrett supplies this G30-825 assembled with its actuator, an oil restrictor and water fittings. The installer still needs a V-band manifold flange, a downpipe, oil and coolant lines, intake plumbing and a calibration. A speed sensor kit is recommended to keep shaft speed under 140,000 rpm.

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Description

Garrett G30-825 G-Series II Turbocharger, 1.01 A/R V-Band Internal Wastegate

Garrett’s G30-825 G-Series II Turbocharger with the 1.01 A/R housing is the high-flow complete G30-825, with the 58mm compressor, the 60mm G30 turbine and a V-band internal wastegate housing calibrated by Garrett with a 0.5 bar actuator. Its Garrett rating spans 475 to 825 horsepower for 2.0L to 3.5L engines. The 1.01 A/R housing helps a 3.0L to 3.5L engine, or a high revving 2.0L, reach the upper half of that rating. A street engine that spends most of its time below 4,000 rpm will feel the slower spool and is better on the 0.83 A/R version.

Features

Larger 1.01 A/R internal wastegate housing for lower back pressure at high rpm
V-band joints at the turbine inlet and outlet
Mar-M alloy turbine wheel rated by Garrett to 1050C (1922F)

Specifications

Garrett turbo reference: 5855
Compressor inducer and exducer: 58mm and 71mm
Turbine inducer and exducer: 60mm and 55mm
Turbine housing: 1.01 A/R, V-band inlet and outlet
Wastegate actuator: 0.5 bar
Maximum turbocharger speed: 140,000 rpm
Rotation: Standard

What’s Included

G30-825 G-Series II turbocharger with 1.01 A/R internal wastegate housing and actuator
Oil restrictor and water fittings

Applications

The G30-825 G-Series II Turbocharger is not vehicle specific. Garrett sizes it by engine and output:

Engine displacement: 2.0L to 3.5L
Power range: 475 to 825 horsepower (Garrett rating)

Notes

A 0.83 A/R version is available for quicker spool
The Garrett speed sensor kit is sold separately
Garrett states that running above 140,000 rpm is at the owner’s risk and can cause damage and premature failure
Garrett lists free-float G30 housings from 0.61 to 1.21 A/R for builders who prefer an external wastegate

Frequently Asked Questions

Is the 1.01 A/R G30-825 G-Series II Turbocharger right for a street engine? Only if the engine is large or revs high. The 1.01 A/R housing on this G30-825 G-Series II Turbocharger favors flow near redline, so boost comes in later. For a street engine used mostly at low and medium rpm, the 0.83 A/R version gives better response with the same compressor.
How much power can the G30-825 make with this housing? Garrett rates the G30-825 at 475 to 825 horsepower, calculated from compressor choke flow as potential flywheel horsepower. The 1.01 A/R housing gives an engine the best route toward the top of that range, provided fuel, intercooling and calibration are built to match.
Should I choose the G30-825 or the G30-900? The G30-825 is G-Series II with a 58mm compressor and a 475 to 825 horsepower rating. The first-generation G30-900 has a 62mm compressor rated 550 to 900 horsepower. Choose the G30-825 for a wider operating range, and the G30-900 only when the target is clearly above 800 horsepower.
Can I fit an external wastegate instead? Not to this housing, which is internally wastegated. Garrett offers the G30-825 as a super core and sells free-float G30 turbine housings in V-band, T3 and divided T4 inlets for external wastegate builds. Those are a separate purchase from this complete turbocharger.
What do I need besides the turbo? Garrett supplies this G30-825 assembled with its actuator, an oil restrictor and water fittings. The installer still needs a V-band manifold flange, a downpipe, oil and coolant lines, intake plumbing and a calibration. A speed sensor kit is recommended to keep shaft speed under 140,000 rpm.

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 G30-825 G-Series II Turbocharger, 1.01 A/R V-Band Internal Wastegate [934118-5004S]

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Garrett G30-825 G-Series II Turbocharger, 1.01 A/R V-Band Internal Wastegate

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews