Eventuri Intake Mercedes all X205 C63 / C63S / AMG Carbon

Mercedes C63 C63S AMG Intake

Performance Increase - Stage 2: 22-30 HP, 20-24 Nm
Performance Increase - Stock: 10-12 HP, 12-15 Nm

Metering Data:
Factory Airbox 381 CFM (Average per airbox)
Eventuri Airbox 531 CFM (Average per airbox)

Compatibility with the following models: W205 S205 C205 A205 C63 C63S AMG

The intake system for the Mercedes W205 C63S AMG is the result of extensive development and testing. Our design objectives consisted of three main goals:
1) Increase airflow.
2) Lower intake temperatures.
3) Smooth airflow.

The first goal was achieved by utilizing all available space in the C63S engine bay, resulting in a 39% larger airflow compared to the factory system.
The second goal was achieved by designing a fully sealed system. The C63S engine bay reaches high temperatures, and heat sources such as turbochargers are in close proximity to the intake, making it essential to keep it sealed.
The final goal was achieved by designing an organically shaped system with panel filters featuring rounded edges to ensure that the airflow path contains no sharp bends and remains laminar. With smooth transitions from the filters to the turbocharger inlets, our intake minimizes turbulence, allowing the turbochargers to operate more efficiently.

By meeting all three goals, our W205 C63S intake system meets expectations on all fronts and allows for more efficient airflow generation through the turbochargers. This translates to improved throttle response and actual power gains, which increase with higher levels of tuning. Since various turbocharger upgrades are available for the C63S, we have also developed a special solution for larger turbochargers. Our C63S intake system is available in 2 configurations: 61 mm outlets to fit factory and hybrid turbochargers and 3-inch outlets to fit larger aftermarket turbochargers.

Performance Test

Tests were conducted on both a fully stock C63S and a Stage 2 C63S, which had exhaust pipes and a remap installed. Below is a dyno chart for the Stage 2 car, which had the same tuning in all runs, with only the airbox changed. It is essential to note that the hood was closed during all runs to simulate road conditions. Dyno testing with an open hood - especially with open cone filters - does not provide a reliable indication of how intakes affect power. On the road, the hood is closed, so all the heat from the turbochargers stays in the engine bay. In the case of the C63S, this is intense heat, making a sealed system essential. Dyno testing with an open cone filter and an open hood will show gains, but when the car is on the road, engine heating will cause a significant power drop because open cones will suck in hot air. Additionally, as the car accelerates, open cone filters will continue to suck in heat generated by the engine and turbochargers as they spool up. Under load and acceleration, turbochargers generate a lot of heat, which can even be seen on the glowing sides.

Here, it can be seen that our fully sealed system causes power to increase linearly after 4800 RPM, where the demand for airflow increases, and the factory airboxes become a limitation. These gains were simply achieved by swapping the factory airbox for the Eventuri intake - all other modifications were present for both the factory airbox and the Eventuri intake.

Gains measured on the dyno translate to increased response on partial and full throttle on the road, with the car noticeably more eager to rev to the redline. Tests were conducted on the same day, back-to-back, and temperatures were monitored to ensure consistency. Initially, the car was tested with the standard intake - hood closed. Then we left the car on the dyno and installed the Eventuri intake. The car was restarted - hood closed. Several runs were made with both configurations to obtain consistent results.

The following tests were conducted on the dynamic Insoric Road dyno, which measures performance data on the road. Tests were conducted in Germany by CF Dynamics on the same length of highway, on the same day, between the standard airbox and the Eventuri system. The specific C63S model was stage 1 tuned. As can be seen, after 5000 RPM, as the demand for airflow through the engine increases, the standard airbox becomes a limitation, and gains amounted to 31 HP and 39 Nm thanks to the use of the Eventuri intake.

Flow Tests

We conducted airflow tests using the Superflow SF-1020 to measure maximum flow at a pressure drop of 28” H2O. Tests were conducted on the same day under controlled conditions, using the same test fixture for each system. We tested our sealed intake system with our custom filter, the factory airbox with the factory filter, and an open cone intake system with an inlet pipe the same diameter as the turbo inlet. Both left and right boxes were tested.

This shows how limiting the standard airbox is, which we managed to improve by up to 41% in maximum airflow. Interestingly, the open cone intake system, although it had greater airflow than the standard airbox, did not have greater airflow than our sealed system. This is because the diameter of the inlet pipe remains constant from the turbo outlet to the cone. While our system dramatically increases its internal volume from the outlet to the filter, the open cone system remains at a constant, smaller cross-sectional area. It's like sucking through a straw compared to sucking through a funnel.

Eventuri X205 C63 / C63S / AMG Kit

The Eventuri C63S AMG intake system consists of several components designed to meet a specific goal and crafted with the utmost care.

Each intake system includes:

• 2 x carbon fiber covers with inlets for the turbo inlets
• 2 x airbox bases with inlets
• 2 x carbon fiber air inlets
• 2 x individually designed high-flow panel filters
• 4 x CNC machined aluminum filter flanges
• 2 x CNC machined MAP sensors
• 4 x CNC machined rubber mounting brackets
• 2 x custom EPDM connectors
• Laser-cut stainless steel brackets

Airbox Housing

The airbox kit consists of upper and lower parts separated by filter panels. Each section has been carefully designed to achieve maximum internal volume while providing a smooth airflow path to the turbochargers. The most demanding aspect of this design was increasing the internal volume of the airbox housing to increase airflow compared to stock. Achieving this was possible only by maximizing the total height of the internal housing. The most significant increase in volume occurred by enlarging the upper cover. As can be clearly seen, we managed to achieve a significant increase in volume while providing a smoother airflow path.

Examining the side profile comparison between stock and Eventuri, it is evident that the stock airbox has limited space for airflow after the filter in the upper part. It decreases to just 23 mm in height, whereas in comparison, the Eventuri system reaches a height of 56 mm, which is 143% more than stock. The standard housing also has a large area in the upper part occupied by the MAP sensor. This area is taken from the internal volume and thus causes further limitation. We relocated the sensors to the rear part of the upper sections, allowing for full utilization of the volume above the filters for airflow. Another consideration is the inlet to the lower part of the housing, which in the standard system has a flexible section with multiple grooves 43 mm in height. Our system removes these grooves for a smoother inlet and increases the height to 74 mm.

Front Profile

From the front view, the limited nature of the standard version is clearly visible. The upper section narrows down to just 23 mm in most of its part, significantly limiting airflow. In comparison, our airbox maintains a significantly larger inlet area to the turbochargers. The inlet to the lower section has also been significantly increased. The Eventuri inlet has approximately 84% more cross-sectional area compared to stock.

Custom Panel Filters

To achieve optimal airflow, we designed custom panel filters with a double filtration layer made of tested ISO 5011 non-oiled mesh. The filter media is dry, so it does not require oil, which can damage sensitive flow sensors. Additionally, we designed them with a rounded outer profile rather than the traditional rectangular shape with sharp 90-degree angles. This allowed us to maintain a smoother airbox profile, which has no sharp edges, thereby minimizing turbulence in the airflow path.

Looking into the lower part of the housing, the difference between square and rounded corners is clearly visible.

CNC Machined Filter Flanges

A key aspect when using panel filters is ensuring they are always properly sealed inside the airbox. Since we use resin-impregnated carbon fiber for the intake production, we could not rely on relatively large construction tolerances of carbon fiber compared to precisely machined components. Therefore, we designed CNC machined flanges from a single block of aluminum, which are black anodized, inside which the filters are placed. These flanges are mounted inside the carbon fiber intake and provide reliable and precise sealing around the filter rubber gasket.

Carbon Fiber Air Inlets

The final components updated from our previous EPDM hoses are our front carbon fiber hoses. They connect to the housings using our custom EPDM connectors. The carbon fiber hoses are shaped to smoothly transition from the oval inlet holes in the front panel to the airbox while maintaining maximum volume.

CNC Machined Mounting Brackets

To hold the airbox in place, we use factory rubber bushings, and to hold these bushings, we machine CNC brackets for precise and secure fitting.

Every aspect of the design has been meticulously thought out, and the end result is a system that sets a new standard for intake designs in the Mercedes C63S AMG model.