Eventuri carbon intake system for Mercedes GLC63(S) AMG

MERCEDES GLC63S AMG


Performance increase - Level 2: 22-30hp, 20-24ft-lb

Performance upgrade - OE: 10-12hp, 12-15ft-lb

Flowbench data: OE airbox 381 CFM: Eventuri 531 CFM (average per airbox)



The Mercedes GLC63S AMG intake system is the culmination of extensive development and testing work. Our design brief consisted of 3 main objectives: 1) Increased flow rate. 2) Low intake temperatures. 3) Even airflow. The first objective was achieved by utilizing all of the limited space in the GLC63S engine compartment, resulting in a 39% higher flow rate over the original system. The second objective was achieved by designing a completely sealed system. The GLC63S engine compartment reaches high temperatures with heat sources such as the turbos in close proximity to the intake, so it is critical that the intake remains sealed. The end goal was achieved by designing an organically shaped system with custom-made, rounded panel filters to ensure that the airflow path has no sharp corners and thus the flow remains laminar. With smooth transitions from the filters to the turbo inlets, our intake system minimizes the formation of turbulence, allowing the turbos to work more efficiently.



When all 3 goals are achieved, our W205 C63S intake system delivers on all fronts, allowing the turbos to generate lift more efficiently. This results in improved throttle response and real performance gains that increase with higher maps.


Performance increase: Stage 2 C63S: 22-30 hp, 20-24ft-lb


Performance increase: C63S series: 10-12hp, 12-15ft-lb

Dyno testing was performed on both a stock C63S and a Stage 2 C63S with downpipes and a remap. Below is the dyno chart for the Stage 2 car, which had the same tune on all runs and only had the airbox changed. Importantly, the hood was closed during all runs to simulate road conditions. Dyno testing with the hood open - particularly with open tapered intakes - does not give a reliable indication of how the intakes affect performance. On the road, the hood is closed, so all the heat from the turbos is trapped in the engine compartment. In the C63S, this is intense heat, which is why a sealed system is so crucial. Dyno testing with an open cone system with the hood open does produce gains, but once on the road the heat exposure results in significant performance degradation as the open cones suck in the hot air. Because the higher air temperature is less dense, the turbos won't produce as much lift, resulting in less power. Additionally, after the vehicle accelerates and is pulled through the standing hot air, the open cone intakes will continue to attract heat generated by the engine and turbos as they coil up. When the engine is under load and accelerating, turbos produce a lot of heat, which can even be seen on the red-hot hot sides.



Here with our fully sealed system you can see that power increases linearly after 4800 RPM where airflow requirements increase and the stock airboxes become a limitation. These performance gains were measured after replacing only the stock airbox for the Eventuri intake - all other modifications were in place for both the stock airbox and Eventuri intake.



The increases in performance measured on the test bench lead to increased partial and full throttle response on the road, with the car being pulled to the red line much more eagerly. Tests were conducted consecutively on the same day and temperatures were monitored to ensure consistency. The car was initially tested with the hood closed using the stock intake. Then we put the car on the test bench and installed the Eventuri. The car was then driven again with the hood closed.