The Eventuri F90 M5 inlets are manufactured from high temperature prepreg carbon fiber and come assembled with a number of other components engineered to perform a specific purpose and fabricated to the highest of standards.
Performance
The intake was tested on the road using Dragy to record the acceleration from 60-130mph . Testing was carried out on the same stretch of road and on the same day to keep the variables minimum. Results show that with just the inlets added the acceleration times from 60-130mph reduced by 0.12 seconds which is a significant improvement at such speeds.
Development
During development we designed 2 versions for comparison. One set to be used with our current intake and also the stock airboxes and another set with larger openings to be used with an oversized intake system. Both designs were prototyped and tested on high powered F90 M5's. The results showed that the gains between both sets were the same and so we moved forward with the inlets which could also be used with our current intake system. The diagram shows the 2 designs which were developed.
Comparisons
The performance gains are produced from providing the turbos with a less resistive flow path which allows them to reach peak boost sooner in the RPM range. When comparing to the stock inlets the differences are clear to see. Where the stock tubes narrow down immediately after the connection to the intakes, our tubes maintain a larger diameter and the reduction to the stock turbos is achieved with an internal radius on the machined flanges. This allows for larger volume whilst maintaining a smooth flow path. One of the drawbacks of the oversized inlets was the more aggressive reduction in size to match the stock turbos which created some flow constraints.