XR 71•64 [71lb/min 500-710HP]
- Compressor wheel - 59.1MM Inducer / 82MM Exducer.
- Turbine Outlet - 64mm
- 71lb/Minute Flow Rating.
- 500-710HP Applications.
- Variable preload angular contact bearings.
- Twin gas ring seals at the compressor and turbine.
- Highs strength, lightweight stainless steel center housing.
- Full hydraulic damping of the rotating assembly .
- Integrated oil contaminate filter.
- M62 race material allows higher temperature operation.
- Metallic bearing cages.
Xona Rotor has implemented new features in its XR line of performance
turbochargers. The rotating assembly incorporates a variable preload
angular contact bearing system. The variable preload system reduces
bearing problems associated with ball sliding and scuffing due to high
shaft speeds with insufficient bearing preload and adds an additional
axial damping for the bearings. For expanded details on this
groundbreaking improvement click here:
Xona Tech : Variable preload bearing system
Most performance turbochargers today use a single gas ring for
sealing the shaft. XR turbochargers utilize twin gas ring sealing. This
feature dramatically reduces gas and oil leakage rates for both the
compressor and turbine ends of the rotating assembly. Since the sealing
load is spread across 2 rings, wear rates are reduced and seal life is
also extended. To complement this, large diameter oil slingers are
incorporated into the shaft design at both ends further reducing splash
oil at the piston ring seal location within the cartridge.
Xona uses high accuracy ABEC 7 bearings with M62 advanced powder
races matched to ceramic balls and high strength metallic ball cages,
thus negating the possibility of melted ball cages, which is an
unfortunate downside of older styler phenolic ball cages. These features
result in vast improvements in
high temperature operation and durability.
XR turbochargers offers
7/16 inverted flare oil inlet threads and a
modular oil drain flange that allows for a variety of bolt spacing for
the drain flange. 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
The bearing housing itself is a fully machined high strength
stainless steel piece that has an extended water jacket that fully
surrounds the turbine seal ringland area of the CHRA for improved
cooling of the turbine piston ring seals. This advanced cooling helps
prevent ring collapse resulting in improved durability when operating at
high temperature. The compressor register of the CHRA features an
overbuilt compressor plate and cover interface system that is very
tolerant of external forces and limits distortion of the compressor
wheel to cover clearances that can lead to rubbing and premature