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      04-24-2015, 07:12 PM   #1
Nate@IND
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Examining the F85 X5M: the air intake system

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Many of you have already watched IND’s acquisition of our X5M, as well as our initial dyno testing of the incredible new Super SUV, found in the links below. In addition to product testing and development, our IND company cars serve a second interesting function: they enable us at IND to disassemble, inspect, and study these cars so that our clients don’t have to. Over the coming months we will periodically release images and descriptions of this amazing M truck’s systems, giving BimmerPost members a look into the inner workings on their X5M and X6M vehicles. We’ll start at the front of the car, with the air intake system.

http://f15.bimmerpost.com/forums/sho....php?t=1111936

http://f15.bimmerpost.com/forums/sho....php?t=1113734





As with most modern BMW M cars, BMW has created a stellar intake system to feed the new S63B44B engine. The new airbox directly feeds the turbos with air that is drawn from the very front of the car. The airbox is specifically sized from BMW to generate a pleasing sound, and is likely also designed to take advantage of low inlet temperatures.





We removed the factory airbox lid, expecting to find air filters with built in charcoal sub-filters. Removing these items (for off road use) is a common modification performed by many M car owners, and will net a few extra horsepower at no expense. What we found instead were generously sized air filters with no charcoal sub-filters in sight!







Although we at IND are tinkerers by nature, we have found that the original BMW intake system is a beautifully designed group of parts!

In the coming weeks, we’ll have a look at some other sub-systems of the IND X5M, and inspect some of the components that our clients typically choose to modify. We hope you enjoy our more in-depth look at this amazing Super SUV!
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      04-24-2015, 07:25 PM   #2
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Thanks for the insight! This will be very helpful down the line.
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      04-27-2015, 11:38 AM   #3
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Quote:
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Thanks for the insight! This will be very helpful down the line.
+1
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      04-27-2015, 11:41 AM   #4
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Quote:
Originally Posted by AwesomeM3
Quote:
Originally Posted by Defib View Post
Thanks for the insight! This will be very helpful down the line.
+1
Sweet! Excellent car porn! Lol

Joe
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      04-28-2015, 09:15 AM   #5
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From the looks of these filters, they are allowing air in from 4 of the six sides with 1 side being used for the intake. Impressive
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      04-28-2015, 10:31 AM   #6
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Very impressive, but I wonder why they are still situated in the hot part of the engine compartment. Why not create true cold air intake systems somewhere in the bumper? Maybe I am missing something and technology somehow converts the hot air into cold air....
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      04-28-2015, 10:44 AM   #7
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Seems like BMW always does a great job with its intake systems. That's one area where modifications aren't necessary.
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      04-28-2015, 10:49 AM   #8
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Quote:
Originally Posted by greentrbo95gst View Post
Very impressive, but I wonder why they are still situated in the hot part of the engine compartment. Why not create true cold air intake systems somewhere in the bumper? Maybe I am missing something and technology somehow converts the hot air into cold air....
They are continuously air cooled by exterior air flowing into the intake. Placing the intake down low out of engine compartment would increase risk of hydolock of the engine without much change in intake charge temp. I'm guessing the airbox is closer to ambient temp than the engine bay temp and air flowing thru isn't going to be heated by much flowing thru it.
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      04-28-2015, 10:59 AM   #9
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Loving these new M trucks more and more...very cool!
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      04-28-2015, 11:15 AM   #10
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Quote:
Originally Posted by 1MOREMOD View Post
They are continuously air cooled by exterior air flowing into the intake. Placing the intake down low out of engine compartment would increase risk of hydolock of the engine without much change in intake charge temp. I'm guessing the airbox is closer to ambient temp than the engine bay temp and air flowing thru isn't going to be heated by much flowing thru it.
That's a great point. I forgot not everyone has Southern California weather with two days of rain per year.
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      04-28-2015, 11:55 AM   #11
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Quote:
Originally Posted by greentrbo95gst View Post
Very impressive, but I wonder why they are still situated in the hot part of the engine compartment. Why not create true cold air intake systems somewhere in the bumper? Maybe I am missing something and technology somehow converts the hot air into cold air....
Plus those areas are filled with coolers. Not much real estate down there.
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      04-28-2015, 12:03 PM   #12
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Quote:
Originally Posted by greentrbo95gst View Post
Very impressive, but I wonder why they are still situated in the hot part of the engine compartment. Why not create true cold air intake systems somewhere in the bumper? Maybe I am missing something and technology somehow converts the hot air into cold air....
Seems like sharp throttle response is a very high priority at BMW, intake air takes a very short and relatively straight path to the turbos which is awesome. That really is a beautifully-designed intake system!
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      04-28-2015, 01:10 PM   #13
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For tinkerers by tinkerers
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      04-28-2015, 02:48 PM   #14
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Quote:
Originally Posted by hgmotorsports View Post
Seems like sharp throttle response is a very high priority at BMW, intake air takes a very short and relatively straight path to the turbos which is awesome. That really is a beautifully-designed intake system!
Very good decision by BMW to make the engine be Hot vee back in '08. This eliminated turbo lag before it was introduced in the BMW lineup. Now Audi and AMG have their own hot vee engines... I hope the next engine wont be a 4.0 liter V8 like the Audi and AMG, otherwise the engine choice is boring. I really hope BMW slaps in a 3.5 twin turbo V10 or something mad like that
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      04-28-2015, 07:38 PM   #15
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Quote:
Originally Posted by FilipMPower View Post
Very good decision by BMW to make the engine be Hot vee back in '08. This eliminated turbo lag before it was introduced in the BMW lineup. Now Audi and AMG have their own hot vee engines... I hope the next engine wont be a 4.0 liter V8 like the Audi and AMG, otherwise the engine choice is boring. I really hope BMW slaps in a 3.5 twin turbo V10 or something mad like that
Small displacement V10 would be epic.

Though nobody has eliminated turbo lag.
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      04-28-2015, 10:06 PM   #16
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What's the material constituent of the filter themselves? Cotton, synthetic blend, etc.?
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      04-29-2015, 01:06 AM   #17
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Quote:
Originally Posted by greentrbo95gst View Post
Very impressive, but I wonder why they are still situated in the hot part of the engine compartment. Why not create true cold air intake systems somewhere in the bumper? Maybe I am missing something and technology somehow converts the hot air into cold air....
The intake snorkels are pulling air in from the high pressure zone I front of the radiator. The air is cool since it is before the rads and with the higher preasure zone in that area of the car it helps with reducing the effort for air intake. Lower in the bumper would not add any real benefit being that it is a turbo motor.

If your talking about having the actual filters outside if the engine compartment the you would have more plumbing and bends which would be more of a detriment. You would still have heat soak on any pipe in the engine comparent. Plus there are intercoolers. Having 20 degree cooler air as it is compressed and running past 1500 degree turbos will notake much of a difference.
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      04-29-2015, 10:57 AM   #18
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Quote:
Originally Posted by aajami View Post
Small displacement V10 would be epic.

Though nobody has eliminated turbo lag.
It's close enough. The throttle might not as responsive as it was with the NA cars, but there is definitely no turbo lag. Maybe a slightly softer throttle, but if you are talking about lag, then I highly doubt it.
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      04-29-2015, 09:13 PM   #19
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Non dickhead question here: the market for this vehicle is so small, even smaller is the tuning market, why so much effort on the x5m?
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      04-29-2015, 10:38 PM   #20
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nice,
really like the engine bay look of the new x5/6m
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      07-10-2015, 09:58 AM   #21
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I guess no one will attempt to make an intake for the X5m. At least carbon fiber covers on OEM box? Coming from an F80, the X5m engine bay needs carbon fiber.
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      07-10-2015, 12:06 PM   #22
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Quote:
Originally Posted by classyfast
Non dickhead question here: the market for this vehicle is so small, even smaller is the tuning market, why so much effort on the x5m?
Real enthusiasts love a challenge?

I know I do.
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