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AVO 420 Ball Bearing Turbo 2.5L STi

AVO 420 Ball Bearing Turbo 2.5L STi
Item# S2A01G06A420A-SPO-S

Product Description

With a medium-sized CHRA center matched to the AVO 4-5 exhaust housing, this turbocharger combines quick response with good mid-range response. The larger exhaust housing allows for higher boost levels without worry of boost creep.

Flow Rate 44lb/min Compressor Housing 0.60 SAR Exhaust Housing AVO 4-5 Turbine Wheel 46.95mm

*Supplied with an AVO adjustable 15psi (1bar) solid boost actuator. Includes all oil and water fittings.

AVO's big ball-bearing turbochargers are true bolt-in applications. Based upon our famous Edge Series design, these turbos have been designed from the ground up to provide better reliability, performance, and response than the factory turbocharger units. All our turbochargers come with all the stainless steel water and oil fittings for the turbocharger. Also included is the famous AVO 15psi adjustable solid boost actuator, which provides for much better boost response and to maintain boost levels at higher RPM.

All of our AVO ball-bearing turbochargers are water-cooled and comes with the proper oil and water lines. Our AVO turbochargers have been designed to perform in the harshest conditions possible, and have been tested in them as well. AVO products are not designed to be as reliable as OEM - they are designed to be much better than OEM. High nickel content housings ensure our turbos will go the distance. Another key performance points is the Garrett® compressor and turbine wheels, which are lightweight with knife-like edges for unmatched spooling, yet built strong for reliability. An AVO ball-bearing turbocharger is likely to outlast your engine.

Thanks to single-cartridge, dual ball-bearing technology, Garrett® turbochargers generate far less frictional drag and are 10 times more durable than traditional journal-bearing turbochargers. New, efficient turbine stages deliver more power to your engine and allow ball bearing turbochargers to spool up faster than ever and have proven to be far more durable than journal bearing turbochargers.

For a long time, journal bearings have been the standard technology used within a turbocharger, dating from when turbochargers were mainly used in diesel trucks. In the last few decades, turbochargers are being used with increasing frequency within passenger cars, which operate over a longer rpm range and use smaller petrol motors. To address the needs of the modern automobile, ball-bearing cartridges were designed to improve turbocharger response. Expensive at first, it is now an affordable technology advancement that provides significant performance improvements to the turbocharger.

The ball bearing design reduces the required amount of oil required to provide adequate lubrication. This lower oil volume reduces the chance for seal leakage. Also, the ball bearing is more tolerant of marginal lube conditions, and diminishes the possibility of turbocharger failure on engine shut down. Ball-bearing cartridges offer much better damping and control over shaft motion, allowing enhanced reliability for both everyday and extreme driving conditions. Too much shaft motion can lead to an early failure of the turbocharger, and is a leading cause of early failure with journal bearing turbochargers. In addition, the opposed angular contact bearing cartridge eliminates the need for the thrust bearing - commonly a weak link in the turbo bearing system.

AVO Edge Series Turbochargers are designed from scratch, so that we could eliminate the inherent design flaws of the factory turbocharger. 1 of the biggest flaws is the small internal wastegate on the factory design. We engineered in an extra large internal wastegate. This has the advantage of keeping the system looking as stock as possible, bolting up to the car like the factory unit, but without the factory faults. The AVO turbine housing is designed for maximum flow within an internal wastegate style housing, as we run the largest wastegate swing valve possible to eliminate chances of boost creep in high horse power engines. The quality of the AVO turbine housing is far above the rest with thousands of hours invested into R&D to insure our turbo housing performance. We only use the highest quality, high-temperature casting, which are machined on a 5-axis CNC machine to insure we maintain the precise tolerances necessary for maximum performance and reliability.