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      01-29-2019, 09:14 AM   #1
Imran@Evolve
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Eventuri Intake BMW F90 M5

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The F90 M5 Eventuri intake system was developed through extensive real world testing and airflow simulation analysis. It demonstrates the perfect balance between allowing for unrestricted airflow with our semi-open filter housings whilst maintaining low IATs through cold air saturation with our scoop and shield combination. The large front air scoops transfer ambient air directly into the intake area thus ensuring the engine doesn’t suffer from heat soak. In addition, the gold heat-reflective lined shields have integrated flow guides which direct the ambient air from the scoops into the filters. They have also managed to increase the inlet tube cross-sectional area by over 30% compared to the stock intake as it feeds through the openings in the strut braces. This allows the turbos to work more with less restriction and reduce the waste-gate duty cycles.

The Eventuri Difference

The F90 M5 Eventuri system uses their Patented Carbon Fibre Housings and Gen 2 bespoke filters, which provide an aerodynamically efficient airflow path from the filter to the turbos. Not just another cone filter with a heat shield but a unique design which invokes the Venturi affect and maintains laminar flow conditions to reduce the drag on the turbo. You can read more about the housing design and how it works here.

Product details





The Eventuri F90 M5 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:

2 x Carbon Fiber Venturi Housings with Integrated Tubes
2 x Bespoke High Flow Generation 2 Filters
2 x Aluminium Inlet Cowls
2 x Carbon Fiber Air Scoops
2 x Laser Cut Heat Shields lined with Gold Heat Reflective Material
2 x Laser Cut Air Ramps integrated into the Heat Shields
High Quality Silicon Couplers and OEM Spec Hose Clamps



INTAKE HOUSING ASSEMBLY



The filter housings comprise of the bespoke generation 2 filters, aluminium inlet cowls, the carbon pods and integrated tubes. The carbon pods shroud the reverse mounted filters and smoothly shape the airflow down to the stock turbo inlet tubes. This is a key feature of the intake design where we have removed the requirement for a convoluted rubber hose between the airbox and the turbo inlet tubes. The filter housings and integrated tubes extend all the way to the stock turbo tubes and are able to move as one piece with the engine through the strut braces. This removes the extra interfaces of having a separate convoluted tube which the stock system requires for flexibility as the stock airboxes are mounted to the chassis so cannot move. The result is a smoother path from the filter to the turbo inlets and therefore the turbos are able to function with less drag. The diagram below summarises the differences between the stock airbox and the Eventuri F90 filter housing.



INTERNAL VOLUME

Another key design feature of the intake housings is the internal volumes of the tubing as they pass through the strut braces. On the F90 M5, the airbox system must pass through an oval opening in the strut brace on each side before reaching the turbo inlets. They have managed to increase the internal size of our intakes at this junction which results in more available volume for the turbos to draw from and therefore less restriction. The increase in cross sectional areas between the Eventuri and the stock airbox is 31% as follows:

Internal Cross Sectional Area of intake tube at the strut brace:
Stock Airbox Tube = 6487mm˛
Eventuri Intake Tube = 8497mm˛

PATENTED TECHNOLOGY

The patented filter housings have a smooth reduction in cross sectional area as they shroud the filters and taper down to the tubing. This geometry 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 patented design and a regular intake system. The bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings.



HEAT SHIELDS AND AIR RAMPS



The filter housings sit on top of these laser cut shields which also have a gold reflective backing to aid against radiated heat transfer. The shields attach to the chassis and also provide an enclosure for the openings of the housings to draw cool air from. This is aided by the integrated air ramps fixed to the inside of each shield. These ramps guide the air from the scoops upwards to the filters so when the car is in motion - the airflow being forced into the ducts from the front scoops is then directly pushed into the filter area displacing any engine bay heat.

FRONT SCOOPS





The final carbon components in this system are the front scoops - essential to direct ambient air to the filters.

The scoops were designed for maximum efficiency in directing the incoming air to the stock duct openings. Many aftermarket scoops have a large flat area almost perpendicular to the oncoming air - not great for channeling it into the ducts as the airflow just "hits" this flat portion and creates turbulence.

Unlike most aftermarket "scoops" the Eventuri Scoops have been designed extend from the stock duct openings all the way to the grills. In order to capture as much air as possible, the scoops are shaped to the same contours as the outsides of the grills and then smoothly channel ambient air through a continuous curve to the duct openings. CAD images to illustrate the shape:



Having an effective cold air feed to the filters is an essential part of our design. Simply having some heat shields in place is not an effective means of avoiding heated air from entering the filters unless the shields create an air tight envelope around the filters. The scoops and shields in our system combine to provide the filter openings with ambient air and maintain low intake air temperature.

Sound Clip

Eventuri BMW F90 M5 Sound

Performance

The intake was tested on the road using a Vbox unit to record the acceleration from 60-130mph . 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 - on stock software, the acceleration times from 60-130mph reduced by 0.22 seconds which is a significant improvement at such speeds. The car was tested three times in each configuration and the best time taken for each configuration for the results below.

Acceleration results summary:

60-130mph with Stock intake = 8.48 seconds
60-130mph with Eventuri intake = 8.26 seconds

The gains are from a combination of reasons:

1) The larger inlet tube volume alows the turbos to work with less drag.

2) The Venturi housings provide a smooth transition from the filter to the intake tube keeping airflow laminar.

3) The large front scoops force ambient air into the intakes keeping the IATs low.





Installation guide:

Eventuri Install Guide F90 M5

More pictures!









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      01-29-2019, 10:00 AM   #2
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Nice write up!!!
Didn't think it could save .22 sec
Did you Dyno before and after to see gains in HP?

It sounds sick, I love mine
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      01-29-2019, 10:34 AM   #3
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Quote:
Originally Posted by Miko M View Post
Nice write up!!!
Didn't think it could save .22 sec
Did you Dyno before and after to see gains in HP?

It sounds sick, I love mine
We prefer Vbox testing as you get real airflow which is not really possible to replicate on the dyno. On the dyno we coudn't keep the IAT between stock and Eventuri but on the road the Eventuri had lower IAT than stock.

Glad you are happy with it. It does look and sound awesome too.
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      01-29-2019, 10:53 AM   #4
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Really like the looks! Hope to have one installed soon!!!
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      01-29-2019, 11:06 AM   #5
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August 24 vs September 11. What was the atmospheric conditions of each test ? Density altitude ?
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      01-29-2019, 11:09 AM   #6
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Also, would love to see your airflow data on a Flowbench at 10" of H20.
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      01-29-2019, 11:14 AM   #7
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Installed on our F90 M5.

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      01-29-2019, 11:24 AM   #8
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Quote:
Originally Posted by onfireX5 View Post
August 24 vs September 11. What was the atmospheric conditions of each test ? Density altitude ?
The tests were done on the same day as close as possible. Those dates are when the graphs are generated from Vbox Tools website not the actual date on the runs.

We would only ever test back to back so conditions are as close as possible.
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      01-29-2019, 11:57 AM   #9
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Quote:
Originally Posted by Imran@Evolve View Post
Quote:
Originally Posted by onfireX5 View Post
August 24 vs September 11. What was the atmospheric conditions of each test ? Density altitude ?
The tests were done on the same day as close as possible. Those dates are when the graphs are generated from Vbox Tools website not the actual date on the runs.

We would only ever test back to back so conditions are as close as possible.
That was mine assumption...back to back testing is the only way to get accurate readings

I would also do multiple runs on each and get average to eliminate any error
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      01-29-2019, 12:00 PM   #10
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Quote:
Originally Posted by Miko M View Post
That was mine assumption...back to back testing is the only way to get accurate readings

I would also do multiple runs on each and get average to eliminate any error
Hopefully we will see more independant data as more kits get out there.
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      01-29-2019, 12:17 PM   #11
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Awesome!

What the expected installation time for this?
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      01-29-2019, 12:30 PM   #12
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Quote:
Originally Posted by shayan30 View Post
Awesome!

What the expected installation time for this?
No more than an hour. Its simple to install
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      01-29-2019, 02:00 PM   #13
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Quote:
Originally Posted by Miko M View Post
Nice write up!!!
Didn't think it could save .22 sec
Did you Dyno before and after to see gains in HP?

It sounds sick, I love mine
I did dyno right before the install... Some time next week, I'll throw her back on the same dyno to see if there are results...

Mustang Dyno
AWD
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      01-29-2019, 03:23 PM   #14
onfireX5
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Quote:
Originally Posted by shoei View Post
I did dyno right before the install... Some time next week, I'll throw her back on the same dyno to see if there are results...

Mustang Dyno
AWD
Killer power on a Mustang.
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      01-29-2019, 05:09 PM   #15
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Quote:
Originally Posted by IND-Distribution View Post
Installed on our F90 M5.

[img]https://c2.staticflickr.com/8/7837/3...1e670c3b_b.jpg[/img]
CF porn!
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      01-29-2019, 06:03 PM   #16
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Very nice
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      01-29-2019, 06:04 PM   #17
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Quote:
Originally Posted by onfireX5 View Post
Quote:
Originally Posted by shoei View Post
I did dyno right before the install... Some time next week, I'll throw her back on the same dyno to see if there are results...

Mustang Dyno
AWD
Killer power on a Mustang.
Yeah I'm not gonna lie, was expecting far worse, lol... There's a reason people call the mustang the "heartbreak machine" lol
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      01-29-2019, 09:08 PM   #18
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Quote:
Originally Posted by shayan30 View Post
Awesome!

What the expected installation time for this?
Quote:
Originally Posted by Imran@Evolve View Post
Quote:
Originally Posted by shayan30 View Post
Awesome!

What the expected installation time for this?
No more than an hour. Its simple to install
An hour is max. This intake design it very good and spot on.
Everything slip in like a glove.
Stupid easy installation.
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      01-30-2019, 04:14 AM   #19
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Quote:
Originally Posted by r33_RGSport View Post
An hour is max. This intake design it very good and spot on.
Everything slip in like a glove.
Stupid easy installation.
Yes thats worst case. It takes our techs around 30 mins.
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      01-30-2019, 07:07 AM   #20
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At 10” of H20 , the stock airbox assembly flows 445cfm with stock filters but charcoal deleted. With BMC filters it flows 492cfm. What does the Eventuri flow at 10” ?
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      03-07-2019, 10:23 AM   #21
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Looks very well made and the data looks promising as well.
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      03-07-2019, 12:34 PM   #22
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