Xona Rotor X2C XRC4951S | 260-510 HP | Performance Turbo

All prices are in EUR, excluding VAT.

Price shown for: Turbine Housing: Supercore Only; Actuator: No; Speed Sensor: No. Other configurations may cost more. Please contact TDP to confirm the required specification, availability and lead time.

Previous naming convention: X2C XR4951S

Features of a XRC4951S Turbo: 

• XRC Aero Package
• 49LB/Min HTC Compressor Wheel
• 260HP – 510HP
• 57/51MM Turbine Wheel
• 49.2/68MM Compressor Wheel
• C/H A/R: 0.56
• Dual Ceramic Ball Bearing
• Billet Stainless Steel Lightweight Bearing Housing
• Integrated oil contaminate filter
• M62 race material allows higher temperature operation
• Metallic bearing cages
• Only 2.5kg 

Product Information

Xona Rotor has implemented innovative features in its XR line of performance turbochargers to enhance performance and durability. Among them is Xona’s proprietary variable-preload ball bearing cartridge system. Traditional bearing systems with insufficient preload can experience ball sliding and scuffing at high shaft speeds, leading to fretting of the bearing races and short bearing life. For expanded details on this groundbreaking improvement, click here:

Xona Tech : Variable preload bearing system

The bearing housing itself is a fully-machined, high-strength stainless steel component with an extended water jacket. By fully surrounding the turbine seal ring land area, this advanced cooling feature combats heat soakback, preventing piston ring collapse for enhanced durability at high temperatures.

A turbocharger’s bearing system is its heart, and Xona Rotor has left nothing on the table. Xona XR turbochargers use hybrid (ceramic balls and steel races) ball bearing cartridges unlike those found elsewhere. These high-precision ABEC 7 angular contact ball bearings are made with advanced M62 high-speed powder metal steel races, silicon nitride ceramic balls and metallic ball cages. No melted ball cages here. Together these features deliver significantly elevated robustness and durability at extreme temperatures compared to conventional ball bearing systems.

Most performance turbochargers today use a single piston ring for sealing the shaft at each end. By contrast, Xona XR turbochargers employ twin rings at both the compressor and turbine ends. This feature dramatically reduces oil leakage and gas intrusion at both ends of the rotating assembly. Furthermore, since the sealing load is spread across two rings, wear rates are reduced and seal life is extended. Complementing this are large-diameter oil slingers incorporated into both ends of the shaft, further reducing splash oil at the piston ring seal location within the bearing cartridge.

The compressor register of the CHRA features an overbuilt compressor backplate and cover interface system that is very tolerant of external loads, limiting structural distortion that can lead to compressor wheel rubbing and premature failure.

At the oil inlet, XR turbochargers offer a choice of 7/16″ inverted flare or straight M12x1.25 connections. Built into the oil inlet cavity of the CHRA is a large volume “last ditch” oil filter element that prevents oil contaminants from entering the bearing system and plugging oil passages within the turbocharger. At the other end of the Xona XR’s bearing housing, a modular oil drain flange allows for a variety of bolt spacing.

Available configurations

Configuration choices listed by AET; contact TDP for pricing beyond the configuration stated above.

Turbine Housing

• Supercore Only
• SS V-Band 0.52A/R
• SS V-Band 0.63A/R
• SS V-Band 0.86A/R
• SS V-Band IWG 0.62A/R
• SS V-Band IWG 0.80A/R

Actuator

• No
• Actuator with bracket-rod-kit (14 psi)

Speed Sensor

• No
• Speed Sensor Machining Only
• Speed Sensor & Speed Sensor Machining
• Speed Sensor Unterminated Extension Lead & Speed Sensor Machining
• Speed Sensor & Speed Sensor Unterminated Extension Lead & Speed Sensor Machining