Porsche 944, Audi K26/k27 Stg Ii Hybrid 550 Hp Billet Compressor Turbo on 2040-parts.com

KKK K-26/27 STG II Special Hybrid Billet Compressor, Ported, Blueprinted Turbocharger

      Porsche 944 and Audi owners that are looking for a bit more than a simple upgrade turbo, we have a billet compressor wheel solution here that can deliver up just over 500 HP when asked.  For this special hybrid turbocharger, we at Exclusive Turbosystems have taken the route of basing this hybrid on proven KKK components combined with a lightweight and strong billet compressor wheel upgrade to the stock cast 44 mm Porsche spec wheel.  The precision German engineering applied to manufacture the original Porsche 944 spec turbocharger is retained for the turbine section of this unique performance upgrade turbo.  The compressor section is a much larger K-27 spec for it's additional airflow capacity.  The compressor wheel inducer is a full 54 mm which is well matched to the highly efficient turbine wheel as fitted for use in the Porsche 944.  We have fully modified the CHRA and turbine housing to properly match the flow capabilities of this 55 pound/ hour capacity compressor.

     As with all of our signature series turbos, the CHRA is fully modified for increased durability and performance.  The journal bearings are modified to increase oil flow to the turbine shaft surface.  Of course the turbine shaft bearing journals are polished for reduced friction during operation.  For this level of turbocharger upgrade the thrust plate has been upgraded with a specially fitted 360 degree  plate for better durability with higher boost loads.  Each thrust plate pad is polished and its oil ports chamfered for higher flow at the thrust surface under load.  These modifications don't just reduce the friction of the CHRA but also deliver more lubricating oil to the rotating components and improve the cooling of the bearings during operation.  Friction reduction within the CHRA has a net gain of 150 rpm sooner full boost over an unmodified CHRA rotor group.  Wow, that is worth the effort in anyone's book, lag is nobody's friend.

     The housings are touched by our carbide burs and sanding rolls as well.  The working side of this turbo has been heavily worked over to give the exhaust gasses an easy path to the turbine blade tips.  Velocity improvements in turbine housings directly relate to improved boost response and compressor map efficiency.  Cast surfaces are poor in factory turbochargers and the KKK K26 is no exception.  We have spent a few hours correcting the imperfections of the factory turbine housing casting.  Even the turbine outlet is ported to improve the gas flow after the turbine wheel.  This porting alone will vastly improve the spool-up speed of the turbine owed to the huge reduction in backpressure.  The compressor wheel is not only 10 mm larger in diameter at the entry but the overall diameter of the wheel is larger as well.  This K27 wheel moves air on another level compared to the factory (944 spec) K26 compressor, and because it has updated aerodynamic profiling, it far exceeds the compressor map efficiency of any cast wheel of similar dimensions.

     Because of the above mentioned modifications to this turbocharger, you can expect a 400 rpm sooner onset of boost over an unmodified hybrid offered by another turbo specialist.  And this is with a turbo that fits right on the factory up-pipe and downpipe!  The porting and CHRA really make this a sweet turbocharger, but with a billet compressor wheel it brings modern turbocharger performance to the classic Porsche 944T.  A favorite with 944 owners who have larger injectors, an upgraded intercooler, exhaust system upgrade and high-flow air intake system. 

Features:

- Compressor wheel upgraded from 43.92mm to 54.57mm

- Forged aluminum billet compressor wheel material

- Blueprinted CHRA

- 360 Degree thrust components

- Modified KKK housings

- Fully ported compressor and turbine housings

- Polished compressor housing exterior