Eventuri Carbon intake system for Audi C8 RS6/RS7

AUDI C8 RS6 RS7 intake system
Power increase - Stage 1 : 45-50hp, 49ft-lbs
Stage 1 acceleration 100-200Km/h: reduction by 0.6s
Performance increase - Stage 2 : 60-80hp, 60-70ft-lbs

The Audi C8 RS6 intake system is the result of extensive development, testing and prototyping. Our goal was to meet 2 main criteria: 1) Increased flow rate. 2) Smooth airflow. The first goal was achieved by taking advantage of the limited space in the RS6's engine bay, which was severely restricted by the underside of the hood. Our solution was a complete redesign of the entire airbox, maximizing volume, increasing the airflow entry ports and creating a more favorable filter angle to the turbos. We also dramatically increased the turbo inlets by up to 85% when measuring the cross-sectional area at the ports. The second goal was achieved by designing an organically shaped system with a specially rounded plate filter to ensure that the airflow path contains no sharp corners and thus the flow remains laminar. By providing smooth transitions from the filter to the turbo inlets, our intake system minimizes the formation of turbulence, allowing the turbos to work more efficiently. In collaboration with BMC, we have developed a custom filter element to ensure that the filter area is as large as possible while keeping the airflow clean.

When all targets are met, our C8 RS6 intake system delivers on all fronts, allowing the turbos to produce boost more efficiently. This results in improved throttle response and significant power gains that have been independently tested and increase with higher tune levels. The measured power gains are a result of the complete system we have developed from the airbox base to the cover and intakes.

dyno tests

Our intake system has been independently tested both on the dyno and on the road. At higher tuning levels, the turbos require more air and the stock airbox becomes a greater limitation. Here are some results from reputable tuners who have tested the intake tract.

STAGE-1 TESTS

Dyno testing was carried out by Awesome GTI in the UK on their own C8 RS6 fitted with an OPF exhaust and their own Stage 1 remap. The car was run 4 times in 4th gear with the stock airbox and then switched to the Eventuri whilst the car remained on the dyno. The car was then run 4 times in 4th gear again. The tests were all carried out on the same day and no other changes were made. The graph below shows the highest power with the stock airbox compared to the highest power with the Eventuri intake. In both cases these are the first dyno runs with power decreasing on subsequent dyno runs due to heat buildup. As can be seen below the intake offers a significant power gain across the entire rev range. The highlighted point shows the highest power gain in the 60bhp rev range at the crankshaft. The resulting performance improvements are noticeable on the road, with better throttle response and improved acceleration times.

STAGE-2 TESTS

Dyno testing on a Stage 2 RS6 was done by Eurocharged Canada on a car with aftermarket downpipes, intercoolers and their own Stage 2 remap. The numbers shown here are measured at the wheel. The car was run several times with the stock airbox and the Eventuri. The resulting numbers are shown below after comparing the best stock and the best Eventuri results. Again, we see a dramatic increase in power and since this is Stage 2, the stock airbox is an even bigger limitation. The highlighted point shows the highest gain in the RPM range of 79 hp at the wheels.