Which class is the 0.18 inch GXR55-88 Super Core with the 103mm turbine made for?

Garrett lists this GXR55-88 Super Core, part 934174-5008S, for X275 and for classes with an 88mm compressor inducer rule. The 0.18 inch map groove has to match what the rule book specifies, so Garrett asks every buyer to verify the class rules before purchasing.

What turbine housing fits the 103mm turbine wheel?

Garrett lists two dedicated GXR55 housings for the 103mm wheel: 1.24 and 1.40 A/R, both with a V-band inlet and outlet and no internal wastegate. The standard G55 housings with a T6 inlet are listed for the 106mm turbine versions, not for this one.

How much power is it rated for?

Garrett rates it at 1000 to 2350 horsepower on engines from 3.0L to 12.0L. That figure is calculated from the choke flow of the compressor map and represents potential flywheel horsepower. Inside a class, the inducer and groove are fixed, so boost, fuel and the calibration decide the result.

How does this compare with a G55-1950?

Garrett quotes 21 percent more compressor flow for the GXR55-88 than for the G55-1950, along with higher pressure ratio capability and better efficiency at high flow. Like the rest of the range, it has an aluminum backplate and a fully machined, flange-style speed sensor port.

What is the maximum shaft speed?

Garrett sets 84,000 rpm as the maximum allowable speed for this core. Going above it is at the risk of the owner and can cause damage and premature failure, so a speed sensor is a sensible addition. The Garrett sensor kit is sold separately.

Description

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Description

Garrett G-XRace GXR55-88 Super Core, 0.18 Inch Map Groove, 103mm Turbine

Garrett’s GXR55-88 Super Core in this version combines a 0.18 inch map groove in the compressor housing with the smaller of two GXR55 turbine wheels, 112mm at the inducer and 103mm at the exducer. The compressor is an 88.9mm by 133mm XBoost wheel in a 0.88 A/R housing, and Garrett rates the package at 1000 to 2350 horsepower on 3.0L to 12.0L engines with 21 percent more compressor flow than the G55-1950. Garrett lists it for X275 and other classes with an 88mm compressor inducer rule. It only makes sense for a racer whose rule book calls for the 0.18 inch groove; a class that specifies 0.25 inch needs a different part number.

Turbine and Housings

The 103mm turbine wheel has a trim of 86 and pairs with dedicated GXR55 103mm turbine housings, offered in 1.24 and 1.40 A/R with V-band inlet and outlet. Both are free float, so an external wastegate controls boost. The backplate is aluminum and the speed sensor port is fully machined and flange style.

Features

0.18 inch map groove compressor housing for class rules that specify it
88.9mm inducer, 133mm exducer XBoost compressor wheel
103mm exducer turbine wheel with an 86 trim
Fully machined flange-style speed sensor port

Specifications

Compressor inducer and exducer: 88.9mm and 133mm
Compressor trim and housing A/R: 44 and 0.88
Map groove: 0.18 inch
Turbine inducer and exducer: 112mm and 103mm
Turbine trim: 86
Maximum turbocharger speed: 84,000 rpm
Rotation: Standard

Applications

The GXR55-88 Super Core is not vehicle specific. Garrett sizes it by engine and output:

Engine displacement: 3.0L to 12.0L
Power range: 1000 to 2350 horsepower (Garrett rating)
Garrett turbine kits: GXR55 103mm turbine housings in 1.24 and 1.40 A/R, V-band inlet and outlet, free float

Notes

The turbine housing is not included; Garrett’s matching GXR55 103mm turbine housing kits are sold separately
An external wastegate is required, because every turbine housing Garrett lists for this core is free float
The Garrett speed sensor kit is sold separately
Garrett states that running above 84,000 rpm is at the owner’s risk and can result in damage and premature failure
Garrett asks buyers to verify class rules before purchasing a core for an inducer-limited class
Other map groove and turbine combinations are listed in the GXR55-88 range

Frequently Asked Questions

Which class is the 0.18 inch GXR55-88 Super Core with the 103mm turbine made for? Garrett lists this GXR55-88 Super Core, part 934174-5008S, for X275 and for classes with an 88mm compressor inducer rule. The 0.18 inch map groove has to match what the rule book specifies, so Garrett asks every buyer to verify the class rules before purchasing.
What turbine housing fits the 103mm turbine wheel? Garrett lists two dedicated GXR55 housings for the 103mm wheel: 1.24 and 1.40 A/R, both with a V-band inlet and outlet and no internal wastegate. The standard G55 housings with a T6 inlet are listed for the 106mm turbine versions, not for this one.
How much power is it rated for? Garrett rates it at 1000 to 2350 horsepower on engines from 3.0L to 12.0L. That figure is calculated from the choke flow of the compressor map and represents potential flywheel horsepower. Inside a class, the inducer and groove are fixed, so boost, fuel and the calibration decide the result.
How does this compare with a G55-1950? Garrett quotes 21 percent more compressor flow for the GXR55-88 than for the G55-1950, along with higher pressure ratio capability and better efficiency at high flow. Like the rest of the range, it has an aluminum backplate and a fully machined, flange-style speed sensor port.
What is the maximum shaft speed? Garrett sets 84,000 rpm as the maximum allowable speed for this core. Going above it is at the risk of the owner and can cause damage and premature failure, so a speed sensor is a sensible addition. The Garrett sensor kit is sold separately.

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 G-XRace GXR55-88 Super Core, 0.18 Inch Map Groove, 103mm Turbine [934174-5008S]

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Garrett G-XRace GXR55-88 Super Core, 0.18 Inch Map Groove, 103mm Turbine

Turbine and Housings

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews