Eventuri® (14-22) Audi RS3/TT RS Carbon Fiber Cold Air Intake System

With so many aftermarket intakes available, the natural question arises:

“So what’s so special about the Eventuri Intakes?”

There are two main elements in explaining the answer to what sets us apart from the rest:

1. The Patented Eventuri filter housing design
2. Our Bespoke Filters
3. Our emphasis on creating a “Complete Solution”

The Patented Eventuri Filter Housing

Even at first glance the Eventuri intake looks very different to many other aftermarket intakes. Unlike the majority of intakes, which use the same cone filter/tube/heat shield configuration, the Eventuri design is fundamentally different and has been Patented.

AFTERMARKET INTAKE SYSTEMS

Most aftermarket intakes use a cone filter mated to an inlet tube with some type of heat shielding. In this configuration airflow must negotiate a path from the large diameter at the base of the filter through to the smaller diameter of the inlet tube in a relatively short distance. There is usually a velocity stack at the base of the filter to help with the transition, however the stack is usually small. This sudden transition in geometry is detrimental for flow. The result is a loss of throttle response and performance gains are usually limited over the OEM intake system. The diagram below shows a typical aftermarket intake using a cone filter secured to an engine inlet tube. The filter uses a standard velocity stack, which has been highlighted in yellow.

THE EVENTURI INTAKE SYSTEM

The Eventuri is a new type of intake design, which has been granted a patent. We use a cone filter – but here it is inverted and decoupled from the inlet tube. By removing the direct connection between the filter and the inlet tube, the filter is no longer dictating the shape of the airflow. This is now being done by the carbon housing, which is designed to smoothly guide the air into the inlet tube without a sudden change in geometry. This means that we keep laminar conditions throughout the intake, which is a lot more efficient. Furthermore, the funnel-shaped housing invokes the Venturi effect where the smooth reduction in cross-sectional area along the length of the housing causes the airflow to increase in velocity. Essentially the entire housing acts as a large velocity stack. On the road this translates to more power with a smoother delivery as well as sharper throttle response since the airflow is not inhibited by abrupt geometry changes andso is more likely to remain laminar. The diagram below shows an Eventuri intake system using a reverse mounted filter inside an Eventuri housing. The large velocity stack area is highlighted in yellow.

Eventuri Bespoke Filters

To compliment our unique filter housings we designed our filters specifically for this reverse mounted configuration in order to provide the optimum airflow through the system. Detailed descriptions of the filters can be seen in the FILTER section.

The Complete Solution

The final element to our design – which is as important, is our emphasis on creating a complete solution. We dedicate a lot of design effort on ensuring the filter housings are provided with ambient air in the most efficient way possible. Allowing the filters to draw in heated air from the engine bay defeats the objective and in many cases is the cause of an actual loss in power over the stock system once the engine bay is heat soaked. Simply using heat shields is not enough – there must also be a method of channeling cold air into the intake. This is where we have seen some companies use “scoops” but on closer inspection are usually very flat and almost perpendicular to the oncoming air. Not the ideal solution for trying to redirect air at high speeds! Our scoop designs have, where possible a curved face for as much of the exposed area as possible in order to smoothly redirect incoming air to the filters. In doing so we ensure that engine bay heat is displaced and so intake air temperatures are kept as low as possible.

From scoop to duct to housing to inlet tubing – by utilizing organic shapes, we invest a great deal of time and effort in providing a smooth path for the airflow to follow. Hence ensuring maximum efficiency of the system.

Flow Bench Testing

We conducted flow rate tests using a Superflow SF-1020 to measure the maximum flow rate possible at a pressure drop of 28” H2O. Tests were done on the same day in controlled conditions using the same test jig for each system. We tested our full intake system against the stock airbox system. The results show just how restrictive the stock airbox is, which we have managed to improve by up to 58% in maximum possible flow rate. Importantly this has been achieved with a sealed intake system so the intake temperatures will also be maintained at a minimum.







Dyno Testing

Our Stage 3 Intake has been tested by various reputable tuners globally who have been building high powered RS3/TTRS projects for road and track use. The first set of results are from BR Performance Netherlands who tested our system on a TTRS equipped with a TTE700 hybrid turbo. Tests were done on the same day back to back with the hood closed. They tested the stock airbox against our stage 3 intake and also with the addition of our 4" turbo inlet tube which is an additional product - details can be seen on our Audi products page.

Dyno Results Summary:

• Stock Airbox with Modified Stock Turbo Inlet for TTE700 = 576.5 HP
• Eventuri Stage 3 Intake with Modified Stock Turbo Inlet for TTE700 = 606.5 HP
• Eventuri Stage 3 Intake with Eventuri Turbo Inlet for TTE700 = 620.8 HP

Our stage 3 intake has also been tested on full frame turbo builds pushing the limits of the DAZA engine. Recent tests from Eurocharged Canada used our stage 3 intake to achieve 1010whp which further proves the flow capability of the Eventuri system. During testing, Eurocharged tuners commented that they were able to make more power at a lower boost setting using our stage 3 intake in comparison to other systems they had been using. Their RS3 has already achieved a 9.1 second quarter mile pass with a 160mph terminal speed and are well set to go under 9 seconds soon.



The gains are from a combination of reasons:

1) The sealed system keeps IATs low - the RS3 engine bay can get heat soaked very quickly so an open cone filter will cause an increase in IAT values resulting in a loss of performance.

2) The Venturi housing provides a smooth transition from the filter to the intake tubes which are both matched to an internal diameter of 103mm. This helps the hybrid and full frame turbo setups to run more efficiently.

3) The entire system is constructed from pure pre-preg carbon fibre which is great at insulating from heat and has smooth internal surfaces as opposed to fibreglass which will have sharp resin lines present.