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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > What happens when you're bored at home with a dremel?



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      05-28-2007, 06:14 PM   #1
Terry335
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What happens when you're bored at home with a dremel?

You make your own "high flow" air lid.

Last edited by Terry335; 12-19-2007 at 11:19 AM.
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      05-28-2007, 06:21 PM   #2
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PS. I wonder if this K&N will fit:

http://store.summitracing.com/partde...5&autoview=sku

The stock size is 9.75x10.9 (from what I could tell), and you'd just use a 1/4" rubber rope gasket to run around the notch to the right of the filter. Hmmmm...
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      05-28-2007, 06:30 PM   #3
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yeah im sure that has got some great horsepower increases
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      05-28-2007, 06:34 PM   #4
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Quote:
Originally Posted by schneid4323 View Post
yeah im sure that has got some great horsepower increases
Easily 40rwhp. I'm going to market it as the Gruppe-T intake with an introductory price of $1,799.
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      05-28-2007, 06:38 PM   #5
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I dunno, now the drivers side filter edge could lift up under load and let non-filtered air through.
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      05-28-2007, 06:39 PM   #6
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you know thats not going to do anything right? its totally out of the airstream
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      05-28-2007, 06:45 PM   #7
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Quote:
Originally Posted by 533ogetnom View Post
you know thats not going to do anything right? its totally out of the airstream
It might not do anything, but here is my theory:

The air squeezes through that thick bar (which helps seal the filter), and the top of the lid (where I've lowered the fins). The bar extends up at least 2mm in to the air stream, and the fins create a lot of surface area to slow the air down.

Joking aside I think there might be a market for a larger volume high-flow lid like they do with the LS1. There is plenty of space under the good to take it up higher.
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      05-28-2007, 06:46 PM   #8
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Quote:
Originally Posted by scalbert View Post
I dunno, now the drivers side filter edge could lift up under load and let non-filtered air through.
Could happen, but I doubt it. The filter is pretty stiff and the remaining groves hold it down tightly.
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      05-28-2007, 06:50 PM   #9
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I still dunno, I doubt that bar makes much if any difference. Just built a new top to the box. Got your fiberglassing skills up to par?
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      05-28-2007, 06:52 PM   #10
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Quote:
Originally Posted by scalbert View Post
I still dunno, I doubt that bar makes much if any difference. Just built a new top to the box. Got your fiberglassing skills up to par?
Take yours off and look at the path the air flows. It only takes a couple of seconds to snap off. Not great with fiberglass, I'll leave that to someone else.
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      05-28-2007, 06:53 PM   #11
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Quote:
Originally Posted by Terry335 View Post
Take yours off and look at the path the air flows. It only takes a couple of seconds to snap off. Not great with fiberglass, I'll leave that to someone else.
Hrmm, maybe I should pick up an extra air box lid as well and make a mold.
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      05-28-2007, 06:56 PM   #12
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Quote:
Originally Posted by scalbert View Post
Hrmm, maybe I should pick up an extra air box lid as well and make a mold.
Yeah someone could make high flow lids that cost $40 each and sell them for $199 pretty easily. Maybe K&N will come out with a lid+filter combo?
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      05-28-2007, 06:59 PM   #13
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Before anything I wuold like to see a dyno with and without the lid in place. If the gains are minimal without the lid then not much point in doing anything further.
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      05-28-2007, 07:01 PM   #14
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Quote:
Originally Posted by scalbert View Post
Before anything I wuold like to see a dyno with and without the lid in place. If the gains are minimal without the lid then not much point in doing anything further.
Been done and posted, it was around 9hp without the lid.

Keep in mind there is less fresh air coming through the "ram air" on a stationary dyno, but there is hope for gains.
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      05-28-2007, 07:06 PM   #15
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this is super budget.....lol
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      05-28-2007, 08:36 PM   #16
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i dont get it, whatd he do?
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      05-28-2007, 11:28 PM   #17
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Quote:
Originally Posted by Terry335 View Post
You make your own "high flow" air lid.
happy that you only had a dremel, expect what you could do with a chain saw ...
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      05-29-2007, 12:35 AM   #18
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Terry, you are the nutty-ist cat on this whole site ...and God bless ya for it!! You are a true enthusiast!
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      05-29-2007, 01:05 AM   #19
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Quote:
Originally Posted by scalbert View Post
Before anything I wuold like to see a dyno with and without the lid in place. If the gains are minimal without the lid then not much point in doing anything further.
Is 0hp minimal?

shiv
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      05-29-2007, 06:49 AM   #20
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Quote:
Originally Posted by shiv@vishnu View Post
Is 0hp minimal?

shiv


Without falling into the red, I would say that is minimal.
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      05-29-2007, 11:00 AM   #21
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Quote:
Originally Posted by shiv@vishnu View Post
Is 0hp minimal?

shiv
These guys picked up 9rwhp at the stock boost level:

http://www.bimmerfest.com/forums/sho...4&postcount=63

Also I noticed that turbonetics engineer picked up ~15hp with the GruppeM. The long runs to the turbo are definitely a restriction but I wouldn't mind seeing more dyno testing on the lid/airboxes.
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      05-29-2007, 12:32 PM   #22
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Hmm, seems like someone must have read my original post:

http://www.e90post.com/forums/showth...ghlight=airbox
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