Eventuri Intake Honda FK8 Civic Type R Black Carbon

Intake HONDA CIVIC FK8 TYPE R

*Some images show optional turbo pipe and engine cover

Performance Increase: 14-20 HP, 22-29 Nm
V-Box Acceleration: 0.9 seconds quicker from 100-200 km/h

The Honda FK8 Type R intake is the result of extensive design iteration through dyno testing and flow analysis. It was developed to achieve two goals:
1) Maintain low intake temperatures.
2) Unblock the path to the turbo inlet.
The first goal is achieved by placing the filter inside a carbon fiber airbox and utilizing the factory hood seal to block heat soak from the engine. As the intake is located directly behind the radiator, it's crucial for the filter not to be exposed to external factors that could lead to power loss through high intake temperatures. The second goal is achieved by removing the flexible hoses and optimizing the intake path using a Venturi cone directly connected to the filter. Additionally, we added a second inlet to the filter housing with a funnel that draws air from the inner fender area. This nearly doubles the total cross-sectional area from which the turbocharger can draw compared to a single inlet in the stock system. Our carbon fiber airbox capsule housing is designed to maximize available volume and block all heat sources, resulting in industry-leading performance and aesthetics for the FK8 Type R model.

Performance Test

The stock airbox draws air from a single inlet located behind the front bumper. The size of this inlet is very small, measuring approximately 35 cm². Turbocharger requirements make this opening a bottleneck. However, simply opening the filter in the engine bay is unfavorable because the filter position is directly behind the radiator, and as the engine heats up, the filter quickly receives heat. Our intake system solves this problem by keeping the filter enclosed inside the airbox and adding an additional inlet that opens the inlet area by another 28 cm². This, combined with our Venturi cone filter for smooth airflow, results in an immediate power increase across the entire RPM range of 14-20 HP. The dyno graph below shows the comparison between the stock intake and the Eventuri intake system on a stock car with standard mapping and exhaust. Dyno runs were conducted one after the other on the same day, with the engine cover closed. The following results come from independent tuners worldwide:

MSL Birmingham - UK

Master Tuning Asia - Hong Kong

BR Performance - Belgium

Road Acceleration Tests

We also conducted road tests using a Vbox device to record acceleration from 100 to 200 km/h. The tests were performed on the same road - again on the same day to minimize variables. The results show that by adding just the intake, acceleration times from 100 to 200 km/h were shortened by approximately 1.2 seconds, which is a significant change at such speeds.

Summary of acceleration results:

100-200 km/h with stock intake = 13.04 seconds
100-200 km/h with Eventuri intake = 12.17 seconds

Eventuri Honda Civic FK8 Type R Kit

The Eventuri FK8 Type R intake system consists of several components designed to fulfill a specific task and made with the highest care.

Each intake system includes:

• Impregnated carbon fiber filter housing
• Individually designed high-performance filter tested to ISO standard
• Carbon fiber Venturi cone with built-in MAF tube
• Additional inlet funnel
• All components connected with silicone connector with outlets
• Laser-cut sheet metal bracket

Carbon Fiber Filter Housing

The housing is designed to efficiently utilize the available volume after removing the factory airbox. It protects the filter from multiple heat sources in the engine bay. The most direct heat source is the radiator and fan, which direct a stream of hot air directly into the intake area. Other significant heat sources include the turbocharger and intake pipe, which are adjacent to the intake area, and when the engine reaches operating temperature, the engine compartment quickly becomes heat-saturated. All these heat sources require a complete airbox system as a shield - a simple cone and heat shield are unable to perform the same task. During development, we tested open filters with heat shields, and intake temperatures increased significantly, causing power loss. The filter housing prevents the negative impact of these heat sources on the cone filter.

Carbon Fiber Intake Pipe

To connect our cone filter to the factory turbocharger pipe, we designed a pipe with an integrated MAF sensor mount and an innovative Venturi cone filter matched to the inner diameter of the filter neck. This bend allows for maintaining laminar airflow as it passes through the filter and enters the pipe. This replaces the stock flexible rubber hose, which has several deep ribs and creates turbulence in the airflow path. To maintain some degree of flexibility, the pipe is independent of the airbox housing and can move inside it, eliminating stresses caused by engine movements. The Eventuri pipe design provides an aerodynamically efficient airflow path from the filter to the turbocharger, allowing for more effective acceleration generation by the turbine and reducing lag. On the road, this is noticeable as the car responds to accelerations faster and more eagerly, as it is generated more quickly.

As part of our research and development process, we conduct flow simulations through our intake systems to ensure that our initial concepts and calculations match reality. The simulation also helps us further optimize the system for smoother airflow, if possible.

Second Inlet Channel

To increase airflow to the turbocharger, we needed to increase the cross-sectional area from which air can be drawn. The stock opening at the back of the bumper was simply too small, measuring about 35 cm², so we added a second inlet in the form of this funnel, which seals against the base of the filter housing and opens in the inner fender area, away from engine heat sources. This adds an additional cross-sectional area of 28 cm² from which the turbocharger can draw air, and tests have shown that this is significant enough to improve overall engine performance. The diagrams below show how the funnel and airbox housing connect to each other after installation.

Silicone Hose

The final component is our new silicone hose, which replaces the OEM hose and intake kit all the way to the metal turbocharger pipe. The hose removes all interfaces between the carbon intake and the metal turbo pipe. Additionally, we introduced an internal step that matches the stock metal pipe. This eliminates the protruding edge of the metal pipe, which occurs with other replacement silicone hoses. This silicone hose is the final element of the intake and allows for smooth airflow from the intake to the turbocharger pipe.