The Turbo Engineers – TTE420 Hybrid KO4 Turbo Charger (EA113 Engines)
The formula to making a TTE420 starts with a much larger 2871X TTE billet compressor wheel, chosen because is highly efficient, new generation type with ultra-thin blades, creating an extremely high flow for comparative size, giving a compressor map that’s very wide. The Re-Profiled compressor cover is machined to an optimized tolerance to ensure maximum compressor efficiency is given. Also, the intake pipe is ported to give a smooth transition for the incoming airflow. We also fit our TTE CNC K04 silencer delete, we modify the turbo discharge silencer, removing the baffle internals and fitting a new straight-through section, removing any restriction and its function as a noise-cancelling device, and so improving the flow, giving less surge and enhancing the sound.
A key part to driving the large 2871X compressor and in turn making this unit produce the huge power advantage over stock and also the competition is machining and fitting a far larger BorgWarner K16 curved clipped turbine and shaft, while still keeping the k04 core, this is not so easy to do. This K16 turbine gives much lower back pressure and keeps EGT lower compared to stock K04 turbine or clipped stock.