Is the 0.25 inch GXR55-88 Super Core suited to Limited Drag Radial?

Yes. Garrett lists this GXR55-88 Super Core, part 934174-5001S, for LDR, for X275 and for classes with an 88mm compressor inducer rule. It is the map groove version Garrett names for LDR, though the rule book should still be checked for the current groove and inducer requirements.

What is the difference between the 0.18 and 0.25 inch map groove?

The width of the groove machined into the compressor housing ahead of the wheel. Garrett builds the GXR55-88 with either width so each core matches a class rule that specifies one. The compressor wheel, rating and speed limit are the same, so the rule book decides which to buy.

Which turbine housing do I need?

One of the two GXR55 housings Garrett lists for the 103mm turbine: 1.24 or 1.40 A/R, each with a V-band inlet and outlet. The 1.24 favors response and the 1.40 favors flow at high rpm. Both are free float, so an external wastegate is required as well.

How much horsepower does Garrett rate it for?

Garrett lists 1000 to 2350 horsepower for engines from 3.0L to 12.0L. The rating is calculated from compressor choke flow and represents potential flywheel horsepower. In LDR or X275 the compressor is fixed by the rules, so the engine package and calibration decide the result.

Is a speed sensor included?

No. The core has a fully machined, flange-style port ready for one, and the Garrett speed sensor kit is sold separately. Garrett sets a limit of 84,000 rpm, and a sensor lets the tuner log shaft speed on every pass and stay under it.

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Description

Garrett G-XRace GXR55-88 Super Core, 0.25 Inch Map Groove, 103mm Turbine

Garrett’s GXR55-88 Super Core in the 0.25 inch map groove, 103mm turbine form is the version Garrett lists for Limited Drag Radial as well as X275. The compressor housing carries the wider 0.25 inch groove around an 88.9mm by 133mm XBoost wheel, and the turbine is the 112mm by 103mm wheel with an 86 trim. Garrett rates it at 1000 to 2350 horsepower on 3.0L to 12.0L engines. For an LDR car it is the obvious place to start in this family; for a class with a 0.18 inch groove rule it is the wrong part.

Turbine and Housings

The 103mm wheel works with GXR55 103mm turbine housings in 1.24 and 1.40 A/R, each with V-band inlet and outlet and a free-float layout. Garrett fits an aluminum backplate and a fully machined flange-style speed sensor port, and quotes 21 percent more compressor flow than the G55-1950.

Features

0.25 inch map groove compressor housing
Listed by Garrett for LDR and X275
103mm exducer turbine wheel with an 86 trim
88.9mm by 133mm XBoost compressor wheel

Specifications

Compressor inducer and exducer: 88.9mm and 133mm
Compressor trim and housing A/R: 44 and 0.88
Map groove: 0.25 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

Is the 0.25 inch GXR55-88 Super Core suited to Limited Drag Radial? Yes. Garrett lists this GXR55-88 Super Core, part 934174-5001S, for LDR, for X275 and for classes with an 88mm compressor inducer rule. It is the map groove version Garrett names for LDR, though the rule book should still be checked for the current groove and inducer requirements.
What is the difference between the 0.18 and 0.25 inch map groove? The width of the groove machined into the compressor housing ahead of the wheel. Garrett builds the GXR55-88 with either width so each core matches a class rule that specifies one. The compressor wheel, rating and speed limit are the same, so the rule book decides which to buy.
Which turbine housing do I need? One of the two GXR55 housings Garrett lists for the 103mm turbine: 1.24 or 1.40 A/R, each with a V-band inlet and outlet. The 1.24 favors response and the 1.40 favors flow at high rpm. Both are free float, so an external wastegate is required as well.
How much horsepower does Garrett rate it for? Garrett lists 1000 to 2350 horsepower for engines from 3.0L to 12.0L. The rating is calculated from compressor choke flow and represents potential flywheel horsepower. In LDR or X275 the compressor is fixed by the rules, so the engine package and calibration decide the result.
Is a speed sensor included? No. The core has a fully machined, flange-style port ready for one, and the Garrett speed sensor kit is sold separately. Garrett sets a limit of 84,000 rpm, and a sensor lets the tuner log shaft speed on every pass and stay under it.

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.

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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, 0.25 Inch Map Groove, 103mm Turbine [934174-5001S]

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Garrett G-XRace GXR55-88 Super Core, 0.25 Inch Map Groove, 103mm Turbine

Turbine and Housings

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews