Eventuri intake system for Audi RS6 & RS7 C8

Eventuri intake system for Audi RS6 & RS7 C8:

Power increase – Level 1: 45-50 HP, 49 ft-lbs

Level 1 Acceleration 100-200 km/h: Reduced by 0.6 s

Power increase – Level 2: 60-80 HP, 60-70 ft-lbs

The Audi C8 RS6 intake system is the result of extensive development, testing and prototyping. Our goal was to address 2 main criteria: 1) Increased flow rate. 2) Smooth airflow. The first goal was achieved by using all the limited space in the RS6 engine bay, which was severely restricted by the underside of the hood. Our solution was to completely redesign the entire airbox to maximize volume, increase the flow entry ports and create a more favorable filter angle to the turbos. In addition, we dramatically increased the size of the turbo inlets by up to 85% when we measure the cross-sectional area at the ports. The second goal was achieved by developing an organically shaped system with a specially rounded plate filter to ensure that the airflow path contained no sharp corners, thus allowing laminar flow. With smooth transitions from the filter to the turbo inlets, our intake minimizes turbulence formation and the turbos can therefore work more efficiently. We partnered with BMC to develop a custom filter element to ensure the filter area is as large as possible while keeping the airflow clean.

With all targets 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, independently tested, that increase with higher tune states. The measured power gains result from the complete system we developed from the airbox base to the lid to the inlets.

Each intake system consists of:

• carbon fiber airbox base
• carbon fiber airbox cover
• Custom-made BMC panel filter
• Enlarged turbo inlets with CNC-machined reinforcement
• Custom silicone hoses with OEM specification clamps
• Custom-made hardware

test bench testing

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

LEVEL 1 TESTING

Dyno testing was carried out by Awesome GTI in the UK on their own C8 RS6 fitted with an aftermarket OPF rear exhaust and their own Stage 1 remap. They ran the car 4 times in 4th gear with the stock airbox and then switched to the Eventuri while the car remained on the dyno. The car was then run 4 times in 4th gear. All testing was done on the same day and no other changes were made. The graph below shows the peak power of the stock airbox compared to the peak power of the Eventuri intake. Both were the first dyno pulls with subsequent pulls reducing power due to heat impact. As can be seen below the intake provides a noticeable power gain across the entire rev range. The highlighted point shows the highest gain in the 60bhp at the crank rev range.

LEVEL 2 TESTING

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. Figures here are shown at the wheel. They ran the car several times with both the stock airbox and the Eventuri with the results shown below after determining the best results compared to the best Eventuri results. Again we can see a dramatic increase in power and since this is at 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.

DRAG-STRIP TEST

We took a Stage 1 RS6 to a local drag strip to measure the impact of the intake on quarter mile times and also 100-200km/h times. The car ran 3 times on the stock airbox to get a repeatable result and then the intake was swapped to the Eventuri. The car was then run 3 more times to make sure the result was consistent. Results are:

QUARTER MILE

series airbox 11.2s

Eventuri 10.75s

.

100-200km/h

series airbox 7.46s

Eventuri 6.90s