AUDI C8 RS6 RS7
Our C8 RS6 intake system delivers performance on all fronts and allows the turbos to generate boost more efficiently. This results in improved throttle response and significant, independently tested, power gains that increase with higher states of tune. The performance gains measured are the result of the complete system we developed from the base of the airbox to the cover and intakes.
Performance Increase – Stock ECU: 15-25 HP, 11-20 ft-lbs
Performance Increase – Stage 1*: 45-50 HP, 40-45 ft-lbs
Acceleration Phase 1 100-200 km/h: reduced by 0.6 s
Performance Increase – Phase 2*: 60-80 HP, 60-70 ft-lbs
AUDI C8 RS6 RS7
Our C8 RS6 intake system delivers performance on all fronts and allows the turbos to generate boost more efficiently. This results in improved throttle response and significant, independently tested, power gains that increase with higher states of tune. The performance gains measured are the result of the complete system we developed from the base of the airbox to the cover and intakes.
Performance Increase – Stock ECU: 15-25 HP, 11-20 ft-lbs
Performance Increase – Stage 1*: 45-50 HP, 40-45 ft-lbs
Acceleration Phase 1 100-200 km/h: reduced by 0.6 s
Performance Increase – Phase 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 meet 2 main criteria: 1) Increased flow. 2) Smooth airflow. The first goal was achieved by using all the limited space available in the RS6 engine bay, which is severely restricted by the underside of the bonnet. Our solution was to completely redesign the entire airbox, maximising volume, increasing the flow inlet openings and creating a more favourable filter angle for the turbos. Additionally, we significantly increased the size of the turbo air intakes by up to 85% when measuring the cross-sectional area at the openings. The second goal was achieved by designing an organically shaped system with a custom rounded panel filter to ensure the airflow path contains no sharp corners and thus allows the flow to remain laminar. With seamless transitions from the filter to the turbo intakes, our intake minimizes turbulence formation and therefore the turbos are able to operate more efficiently. We worked with BMC to create a bespoke filter element to ensure the filtration area was as large as possible, whilst maintaining clean airflow.
*Some images show our optional carbon engine cover.
Each intake system consists of:
DYNAMOMETRIC TEST
Our intake system has been independently tested on both the dyno and on the road. With higher levels of tune, turbos require more air and therefore the stock airbox becomes a greater restriction. Here are some results from respected tuners who have tested the intake.
STANDARD ECU TEST
The dynamometer test was carried out by Awesome GTI in the UK on their C8 RS6 fitted with an aftermarket OPF rear exhaust. They tested the car with the stock map and also with their stage 1 remap. They ran the car 4 times in 4th gear with the stock airbox and then switched to the Eventuri whilst the car remained on the dynamometer. The car was then run in 4th gear again 4 times. The tests were all carried out on the same day and no other changes were made. The graph below shows the highest power from the stock airbox vs the highest power from the Eventuri intake. Both were early dynamometer tests with subsequent runs reducing the power due to heat input. As you can see below, the intake provides significant performance gains across the entire rpm range with the stock map and even more with the stage 1 remap. The highlighted spot shows the highest gain in the rpm range of 23hp at the wheels.
STAGE 1 TESTING
Here are the results of the Awesome GTI stage 1 remap. Both runs had the same map with only the intake swapped between runs. Again, they spun 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 highlighted point shows the highest gain in the rev range of 60bhp at the wheels. The resulting gains are evident on the road with improved throttle response and acceleration times.
PHASE 2 TESTING
The Phase 2 RS6 dynamometer test was performed by Eurocharged Canada on a car with aftermarket downpipe, intercooler and their stage 2 remap. The numbers here are shown at the wheel. They ran the car multiple times with both the stock airbox and the Eventuri with the resulting data shown below after taking the best stock results vs the best Eventuri results. Again we can see a dramatic increase in power and as this is at stage 2 levels the stock airbox is an even bigger restriction. The highlighted dot shows the highest gain in the RPM range of 79 hp at the wheels.
DRAG STRIP TEST
We took a Phase 1 RS6 to a local drag strip to measure the effect of the intake on quarter mile times and also 60-125mph times. The car was run 3 times with the stock airbox to get a repeatable result and then the intake was swapped for the Eventuri. The car was then run 3 times again to make sure the result was consistent. The results are:
FLOW BENCH TEST
Flow tests were conducted using a Superflow SF-1020 to measure the maximum possible flow rate at a pressure drop of 28” H2O. Tests were performed on the same day under controlled conditions using the same test jig for each system. We tested the intakes alone and then also the complete package with airbox and intakes together for both the stock system and the Eventuri.
The intakes alone test shows a 58% increase in flow over stock. This is due to the way our intakes increase in diameter on the airbox side, which allows for much lower restriction. The complete system test with the airbox shows a 90% increase in flow over stock, which is a significant increase. This shows just how restrictive the stock airbox is, with flow dropping by over 25% when adding the stock airbox to the stock intakes. In contrast, flow drops by just 11% when adding the Eventuri intake to the Eventuri intakes. With a 90% increase in flow, it's clear why there are significant power gains once the C8 RS6 is tuned and the turbos require more flow to create more boost pressure.
*Measured gains may vary based on different settings control unit.
