Description AUDI B9 S4 S5 Performance Gain: 13-17hp, 15-20ft-lbV-Box Acceleration : 60-130mph Reduced By 0.5 Seconds The Audi B9 S4/S5 Eventuri intake was developed to give less restrictive airflow to the turbo whilst maintaining low inlet temperatures. The S5/S4 engine bay becomes heat soaked very quickly so simply having an...
The Audi B9 S4/S5 Eventuri intake was developed to give less restrictive airflow to the turbo whilst maintaining low inlet temperatures. The S5/S4 engine bay becomes heat soaked very quickly so simply having an open cone system would result in better airflow but with higher inlet temperatures. We therefore completely re-engineered the inlet track from the turbo inlet pipe to the front grill with a highly efficient sealed system. The restrictive stock airbox and flexible plastic inlet pipe have been replaced with a Venturi filter housing and a duct system with smooth transitions. Furthermore, by removing the convoluted stock inlet pipe and replacing it with our one-piece Venturi housing and solid tube, the airflow is much smoother as it enters the turbo inlet tube. The resulting performance gains and aesthetics are industry leading for this platform.
The Eventuri Difference
The B9 S4/S5 Eventuri system uses our Patent Pending Carbon fibre Housings with our bespoke Gen-2 filter which provide an aerodynamically efficient airflow path from the filter to the inlet tubes. Not just another cone filter with a heat shield but a unique design which invokes the Venturi affect.
The intake was tested on the road using a Vbox unit to record the acceleration from 60-130mph (also 100-200Km/h). Testing was carried out on the same stretch of road - again on the same day to keep variables minimum. Results show that with just the intake added, the acceleration times from 60-130mph reduced by almost 0.5 seconds which is a significant improvement at such speeds. This demonstrates that the gains measured on the Dyno are not represenatative of how the intake performs on the road when it has the correct flow conditions - on the road the intake shows a larger gain by the reduction in acceleration times as compared to the Dyno (please see images).
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.
Acceleration results summary:
60-130mph with Stock intake = 14.72 seconds
60-130mph with Eventuri intake = 14.24 seconds
100-200Km/h with Stock intake = 12.45 seconds
100-200Km/h with Eventuri intake = 12.12 seconds
The gains are from a combination of reasons:
1) The sealed system keeps IATs low - especially with the front air scoop which forces air into the system.
2) The Venturi housing provides a smooth transition from the filter to the intake tube with no convoluted rubber section. This helps the turbo to run more efficiently by maintaining laminar flow in the inlet track.
3) The entire system is constructed from pure pre-preg carbon fibre which is great at insulating from heat.
What's Included
The Eventuri B9 S4/S5 intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards. Here are the details for each component and the design ethos behind them:
Each intake system consists of:
Carbon Fiber Venturi housing with intergated tube
High Flow Generation 2 Filter
Carbon Fiber Intake Duct
Carbon Fiber Front Scoop
High Quality Silicon Couplers and OEM Spec Hose Clamps
Laser Cut Stainless Steel Bracket Work
CNC Machined Mounting Stubs
Features
Carbon Intake Housing Assembly
The filter housing comprises of our bespoke generation 2 filter, the carbon pod and integrated tube. The carbon pod shrouds the reverse mounted filter and smoothly shapes the airflow down to the turbo tube which it matches in diameter to the turbo tube. This is a key feature of the intake design where we have removed the requirement for a convoluted rubber hose between the intake and the engine. The filter housing and integrated tube extends all the way to the stock turbo tube and by mounting this to the engine, the entire filter housing moves with the engine. As the engine and filter housing moves under acceleration, it is able to maintain a seal to the duct through the use of an expanding rubber extrusion which is mounted to the face of the duct (see below).
This smooth reduction in cross sectional area invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack - below is a diagram to show the comparison between our patent pending design and a regular intake system. Our bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings. Further details can be read in the Technology and Filters pages.
Carbon Fiber Intake Duct
The duct channels ambient air from the scoop to the filter housing. It also creates a sealed volume of ambient air before the filter so that there is a ready supply which the filter can draw from. The duct has been designed to take maximum advantage of the volume available in the engine bay. In order to ensure a good seal against engine bay heat - the duct also has a flexible rubber edging around the openings which press against the filter housing and OEM front duct creating the desired seal yet allowing the housing to move with the engine. To further enhance the airflow we added a secondary opening at the rear of the duct in the cold region of the engine bay. This geometrically complex piece is a key part of our B9 S4/S5 design.
Carbon Fiber Air Scoop
The final carbon components in this system is the front scoop - essential to direct ambient air to the duct and then to the filter.
The scoop was designed with a constant bend radius for maximum efficiency in directing the incoming air to the duct opening. It allows the inlet air temperatures to be as low as possible and increase the rate of drop in IATs after the system is heat soaked during a standstill.
Custom Bracket Work
To ensure a perfect fit we spend a lot of development time on the mounting hardware. Like all our intakes, the brackets are specifically designed for the application and for the B9 S4/S5 system, the brackets are laser cut from stainless steel and then powder coated for durability. The CNC machined mounts are then secured to th ebrackets and push into the stock rubber mounts which the stock airbox uses to secure to. This ensures our intake fits just like the OEM system.
All the components come together in the engine bay to produce a genuine improvement in the driving experience as well as providing an incredible visual display of form and function in complete harmony.
Yes we do, to almost anywhere in the world though remember the postage is often high when shipping anything bulky. Most bulky items we export will go by UPS so you can track the package online and could reach America within 48 hours providing its in stock !
However there are a few countries we do not ship to, some of these include: Israel, Thailand, Malaysia, Indonesia, Russia, Nigeria, Macedonia, Syria, Ukraine, Lebanon.
Why is postage on bulky items to some countries expensive compared to some other companies ?
LFor both yours and our safety we use well known couriers such as DPD Local and UPS for shipping, then we know exactly where it is in the world at any time and we know its going to arrive safely. Shipping small items can be cheap, but items such as bodykits are expensive to ship - we have a very small margin on the postage fees merely to cover packaging. We can now ship using standard post on some items, however using all methods you may incur import charges when you receive the goods for which we cant be responsible for.
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Not everything on our website is in stock, if you need a part desperately please contact us first to confirm availability before placing your order.
How do I place an order if I live within the UK ?
You can either order here in our online shop or you can phone us or email us, using the following number/address are below.
Phone: 07985319479
Email: darkroadperformance@outlook.com
How do I place an order if I live outside the UK ?
Returns Procedure:
- Before returning any goods please read all our terms and conditions.
- Dark Road Performance must be informed by e-mail or telephone on 0044 (0) 7985319479 of any items that you wish to return for credit or exchange within 7 working days commencing the day of delivery. A member of staff will provide you with a Returns Notice Number.
- Please also ensure that you include a copy of your invoice when shipping any items back to us as well as your Returns Notice Number.
- If an item is sent back to us without a Returns Notice Number; a refund will not be given.
- No parts that have been used, fitted or installed will be accepted for Credit or Refund.
- Any parts returned must be in resalable condition.
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For orders that have been supplied correctly & assuming goods are in re-saleable condition:
-Within 14 days from the day of delivery - Goods can be returned for ANY reason for a full refund of goods and initial delivery charge.
-We do not cover returns postage back to us
-After 14 days from the day of delivery - Goods can be returned but with a 20% handling charge. The initial delivery charge & return delivery charges will NOT be refunded.
-After 28 days from the day of delivery – Goods are not accepted back for refund.
For orders that have been supplied incorrectly & assuming goods are in re-saleable condition:
-Within 28 days from the day of delivery – Goods can be accepted back for full refund, refund for initial shipping and refund for return shipping.
-If goods are not in re-saleable condition e.g fitted/test fitted, original packaging not present, covered in grease/lube etc, supplied correctly or incorrectly we will not accept for a refund.
At our discretion, we may drop ship your order direct from a UK supplier. If we arrange to drop ship an item it will be arranged internally, you only pay the price agreed in advance.
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