PRE compressor wheels machined from billet aluminum alloy block. Material selection: Conventional compressor wheels made by casting aluminum alloy.Smaller cross-section hub weighs less for a reduced moment of inertia and faster spool. Flow is increased at same turbo shaft speed. Slim hub increased air volume with each rotation. Slim hub design: Another feature designed to increase air flow.Slim blades have a smaller cross-section allowing more area between blades for air. Flow is increased at same turbo speed. Thinner blades also weigh less for reduced moment of inertia and faster spool. Slim blade design: Performance feature designed to increase air flow.The larger surface area allows for increased flow volume at same turbo speed. This of it like a larger area of an airplane wing allowing for increased lift. Standard exducer diameter is 60mm, while extended tip compressor wheels had 63mm exducer diameter for total blade area increase of 6%.

Extended tip technology originally developed as “cheater” compressor wheels for racing use. Extended tip design: Conventional compressor wheel tips perpendicular to the exducer diameter.Garrett has proven higher flow potential of the 11 blade design and it has been adopted to this compressor wheel for IHI application. 11 blade design: Conventional design is 6 tall and 6 short blades.VF52 (USDM 09-14 WRX, upgrade for 2008 WRX and 05-09 Legacy GT, originally VF40 or VF46).This particular post focuses on billet compressor wheels for IHI VF-series turbocharger found on JDM, USDM, and UKDM Subaru Impreza WRX and STI vehicles. All testing performed on same vehicles within a narrow installation time window to reduce erroneous data. Torque increase was moderate as well in the mid-range engine RPM. We tested these compressor wheels on the dyno with a consistent 25-30WHP gain at same boost level as stock cast wheel. Every time this product proves to make more power than its cast aluminum counterpart! We have been testing these compressor wheels in various turbocharger models and engine combinations. Pavel’s Racing Engines is extremely excited to offer this product to the public.

Legacy gt vf52 installing