Supplier design and components
TURBO INLETS
The biggest restriction in the stock system are the turbo inlets. The stock inlets not only are small in size but they also have 2 flexible sections. The flexible section immediately in front of the turbo creates turbulence as the engine moves under acceleration. To combat this, the stock inlets also have flow guides at the exit of the inlets but these also create a restriction. Eventuri removed the first flexible section, which also allowed the internal volume to be increased. By increasing the inlet sizes, the turbos are able to pull in air with less restriction hence allowing for a quicker spool.
Eventuri went further and introduced a novel dimpled pattern to the inside surfaces. In theory, small dimples can increase the flow rate by reducing the frictional pressure losses through a tube.
A lot of R&D went into simulating different sizes and shapes until Eventuri settled on an optimised version which demonstrated a higher flow rate through the inlets in comparison with a smooth surface. Applying such an intricate pattern was only possible due to the advanced manufacturing technique used to make the inlets, where traditional methods would not have given the accuracy required. The dimples create an "air cushion" effect over the surface of the inlet which then allows the main body of air to "slip" with less friction through the body into the turbo. This results in a more even velocity profile in a dimpled tube with the net effect being a higher velocity for the same boundary conditions.
The complete system comes together to provide an intake which improves on the stock airbox in performance, aesthetics and sound.
