Eventuri BMW G80 M3/M4 Carbon Intake
The F87 M2 Competition intake system is designed to to allow the turbos to work more efficiently. By replacing the stock airbox system with our Patented Venturi filter housings and smoothly curved tubes, the airflow to the turbos is more laminar thus they can spool with less drag. Since the M2 Competition does not have air openings behind the grills, we also added sealed ducts to ensure that the intake temperatures stay as low as possible. The combination of our Venturi housings, organically shaped tubes and sealed ducts result in an optimised intake which sets a benchmark for this platform.
Description
Dyno Testing
This intake has been independently dyno tested by BR Performance in Belgium. Tests were done back to back against the stock airbox and several runs were taken with each configuration. The car tested was without charcoal filters. We took the best results from the stock airbox and the best from the Eventuri system. The dyno results show a consistent gain throughout the RPM range which can be attributed to the turbos reaching peak boost earlier and with a lower wastegate duty cycle due to the higher efficiency of the intake system. This gain is despite the dyno cell temperatures rising from 11.8 deg C for the stock system tests to almost 16 deg C for the Eventuri tests. The performance gain translates on the road to increased part throttle and full throttle response with the car pulling much more eagerly to the redline.
IAT Testing
Turbo charged cars can build up a lot of engine bay heat which can be detrimental to performance if the intake system is not sealed against it. Even with intercoolers and charge coolers, it is important to minimise Inlet Air Temperatures (IATs) as these cooling devices work with an efficiency ratio so the output air temperature is affected by the input air temperature. Derestricting the intake by using open cones, even if heat shielded will inevitably pull in hot air from the engine bay. Our system being fully sealed solves this problem while still derestricting the flow path using bigger volumes. To demonstrate, we data logged air temperatures using thermocouples just before each turbo. Comparisons were taken between stock and Eventuri on the same day with the same ambient conditions. Our M3 was allowed to heat soak and then it was accelerated from 30mph to 90mph in 6th gear to measure the change in temperature across each run. At 90mph, throttle was released and brakes were applied to 30mph at which point the car accelerated again to 90mph. A total of 3 pulls were made with both intake configurations.
The first graph shows the temperatures on before both turbos with eth stock airbox on the left and the Eventuri intake on the right. Due to scaling, the axes are not perfectly matched between both graphs but the numbers can be clearly seen. As expected, the RHS of the intake showed similar data between stock and Eventuri since the flow path and materials are similar. However, the LHS intake shows a significant improvement in IAT for the Eventuri. This can be seen in the second graph where the 2 charts are overlaid. On each successive pull the Eventuri shows a lower IAT as compared to stock and also the spike in temperature as throttle is lifted is significantly lower with the Eventuri. This difference is down to the more direct flow path with the Eventuri and also the materials used in the turbo inlet.
The Eventuri Difference
The G8X M3/M4 Eventuri system uses our Patented Carbon Fiber Housings with our Gen 2 bespoke filters, which provide an aerodynamically efficient airflow path from the filter to the turbos. Not just another cone filter with a heat shield but a unique design which invokes the Venturi effect and maintains laminar flow conditions to reduce the drag on the turbo.