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F10 / F11 (2011 - Current)
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  #1  
Old 09-29-2012, 10:37 PM
lll F10 lll lll F10 lll is offline
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N55 Intake Idea

Anyone have thoughts on doing this for an N55? Im so tempted to try it...so..so.. tempted. But as far as I know the N55 much more sensitive to all changes on the cold side compared to the N54 correct? Input please. Thanks!

http://www.e90post.com/forums/showthread.php?t=349293
http://www.e90post.com/forums/showthread.php?t=549854
http://www.e90post.com/forums/showthread.php?t=333538
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  #2  
Old 09-30-2012, 04:26 AM
Gypsy550i Gypsy550i is offline
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Location: Las Vegas
 
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if that works for a F10 550i i will do it with you lol
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  #3  
Old 09-30-2012, 07:40 AM
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Needsdecaf Needsdecaf is offline
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1. Why would the N55 be more sensitive to changes on the cold side? And what do you even mean by that?

2. These types of intakes are only beneficial if your turbo is causing negative pressure in the pre-turbo intake while boosting. To see if this will have an effect, you need to do some manometer testing on the intake along several points. Otherwise, all you're doing is marginally cooling down the intake air and letting more sound out.



This setup is actually pretty stupid. There is no need to add a filter on the end of the secondary intake hose. In fact, you're defeating the purpose of this hose. The hose should ideally face forward in the front of the valence with a scoop to collect air while driving. The idea is to pressurize the airbox with as much air as possible to prevent negative pressure. Adding a filter here is redundant and counter to the original purpose.

Here is a better setup. This was from my Volvo days. Not my pics, but I had a similar setup. Another engineer and I did extensive testing to see gains. Even running a tune with 21 psi of boost, it was less than you would think.



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Last edited by Needsdecaf; 09-30-2012 at 08:04 AM.
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  #4  
Old 09-30-2012, 04:50 PM
lll F10 lll lll F10 lll is offline
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^ I believe the issue is MAP vs MAF.

Also, I know what you mean in terms of the filter bring redundant but I guess it was for the purpose of filtration. You're increasing air intake but retaining the same amount of filtration, so I supposed the guy who made it figured why not stick a filter on it as well. In California, we've been hitting high 90's-100's consistently. Considering it costs less than $30 in materials(if not including the cone filter), I wouldn't mind doing it.
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  #5  
Old 09-30-2012, 07:16 PM
Gypsy550i Gypsy550i is offline
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so the question is....is there anyone in vegas that could do this? And does it have a sound difference
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  #6  
Old 02-20-2014, 12:40 PM
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Don Juan Don Juan is offline
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Quote:
Originally Posted by Needsdecaf View Post

This setup is actually pretty stupid. There is no need to add a filter on the end of the secondary intake hose. In fact, you're defeating the purpose of this hose. The hose should ideally face forward in the front of the valence with a scoop to collect air while driving. The idea is to pressurize the airbox with as much air as possible to prevent negative pressure. Adding a filter here is redundant and counter to the original purpose.
Actually is not redundant . Take a look of the N54 intake. The side where Mr5 attached the hose is the side of where the clean air goes into the Turbos (after the drop in filter) . If he did not add the 2nd filter in the new hose, dirt, debris and whatever elsel will get into the Turbos. The whole idea here is to provide a 2nd source of air to the factory intake. The BMS DCI and Cold air intakes will heat soak rapidly in warm weather areas, defeating the purpose. You could add an intercooler and may help some.
So the idea is great but not sure if I would cut into my airbox. Instead more interested in doing air scoops... anyone ?
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  #7  
Old 02-21-2014, 06:38 AM
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hufington hufington is offline
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Why don't you try the Burger Tuning cold air intake?

http://burgertuning.com/N55_BMW_Performance_intake.html
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  #8  
Old 02-21-2014, 09:02 AM
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Don Juan Don Juan is offline
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Quote:
Originally Posted by hufington View Post
Why don't you try the Burger Tuning cold air intake?

http://burgertuning.com/N55_BMW_Performance_intake.html
The bms is nice but not good for my location. Too hot and it will get heat soaked with the standard intercooler. As soon as the car starts getting hot it starts to minimize any gains. The method above avoids that plus it provides another nostril ( for lack of better words) to suck more cold air.
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