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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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      05-29-2007, 12:55 PM   #23
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      05-29-2007, 12:57 PM   #24
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Quote:
Originally Posted by HyperM3 View Post
Hmm, seems like someone must have read my original post:

http://www.e90post.com/forums/showth...ghlight=airbox
Great minds think alike! I've done this on a few cars in the past (usually while waiting for air intakes to come out), and found it can help slightly. Why haven't you tried it yet?
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      05-29-2007, 01:37 PM   #25
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Quote:
Originally Posted by Terry335 View Post
Great minds think alike! I've done this on a few cars in the past (usually while waiting for air intakes to come out), and found it can help slightly. Why haven't you tried it yet?
I put in an ITG filter and I seem to get more noise now anyway. Plus I can hear the diverter valves and turbos A LOT louder too. I guess I just ended up thinking that if it was there for a reason and not removable from the start then Ill leave it. Its not like the older airboxes that had clipped in ports or baffles that you could remove in 5 mins and make it sound like V-Tec
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      05-29-2007, 01:41 PM   #26
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Originally Posted by HyperM3 View Post
I put in an ITG filter and I seem to get more noise now anyway. Plus I can hear the diverter valves and turbos A LOT louder too. I guess I just ended up thinking that if it was there for a reason and not removable from the start then Ill leave it. Its not like the older airboxes that had clipped in ports or baffles that you could remove in 5 mins and make it sound like V-Tec
Yeah it probably doesn't do a lot one way or the other, but on the plus side its free and I don't think it hurt anything. A friend had the idea to raise the entire air lid 1/4 - 1/2" with a spacer (until it hits the hood). I'm not sure how such a spacer would look, but its something to work on.
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      05-29-2007, 01:47 PM   #27
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Quote:
Originally Posted by Terry335 View Post
Yeah it probably doesn't do a lot one way or the other, but on the plus side its free and I don't think it hurt anything. A friend had the idea to raise the entire air lid 1/4 - 1/2" with a spacer (until it hits the hood). I'm not sure how such a spacer would look, but its something to work on.
The only thing that made sense when I brought this up the first time was that the fins might act as load balancers for the top. Because the fins pretty much touch the filter, they might keep the top from compressing under force. Now with the fins removed, there might be more flex in the lid and actually create less volume of air available to pass through.
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      05-29-2007, 02:38 PM   #28
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Quote:
Originally Posted by HyperM3 View Post
I put in an ITG filter and I seem to get more noise now anyway. Plus I can hear the diverter valves and turbos A LOT louder too. I guess I just ended up thinking that if it was there for a reason and not removable from the start then Ill leave it. Its not like the older airboxes that had clipped in ports or baffles that you could remove in 5 mins and make it sound like V-Tec
+1 i hear my turbos spool with the ITG filter. Its a lot louder.
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      05-29-2007, 03:09 PM   #29
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Quote:
Originally Posted by HyperM3 View Post
The only thing that made sense when I brought this up the first time was that the fins might act as load balancers for the top. Because the fins pretty much touch the filter, they might keep the top from compressing under force. Now with the fins removed, there might be more flex in the lid and actually create less volume of air available to pass through.
I would worry more about the filter sucking up than the lid sucking down, but there isn't enough vacuum in there to do either imo. I didn't notice any addl noise with mine, maybe when I add the K&N filter it will get louder.
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      05-29-2007, 03:35 PM   #30
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At least you tired to do something productive with your boredom.
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      05-29-2007, 04:19 PM   #31
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At least you tired to do something productive with your boredom.
The rest of the day was spent playing Command & Conquer 3.
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      05-29-2007, 04:40 PM   #32
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The rest of the day was spent playing Command & Conquer 3.
Terry, I'm surprised how you have so much free time with a little baby. I can't even find a free minute to go wash my car, but then again... I have two little babies
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      05-29-2007, 04:46 PM   #33
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Originally Posted by bimmerlex View Post
Terry, I'm surprised how you have so much free time with a little baby. I can't even find a free minute to go wash my car, but then again... I have two little babies
Hehe he was being pretty good this weekend, mostly sleeping and trying to teach himself to crawl. Next weekends project is to baby-proof the house. I can't imagine two of them at the same time, I think he's going to be an only child.
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      05-29-2007, 06:49 PM   #34
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I actually did this...... looked at the box and the schematic.... it is a good ideal and it does obvious benifits

Last edited by schneid4323; 05-29-2007 at 07:12 PM.
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      06-01-2007, 11:18 AM   #35
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I was looking at our whole intake setup last night. It seems like it wouldn't be to hard to remove the whole intake box and all and create a "Y" coming from each of the pipes feeding the turbos and add a large cone filter. Then I was planning on fabricating a box around it tying it into the factory snorkel.
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      06-01-2007, 12:18 PM   #36
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Quote:
Originally Posted by AR230WAKEBOARDER View Post
I was looking at our whole intake setup last night. It seems like it wouldn't be to hard to remove the whole intake box and all and create a "Y" coming from each of the pipes feeding the turbos and add a large cone filter. Then I was planning on fabricating a box around it tying it into the factory snorkel.
I had noticed the same thing and considered doing it; but then decided against it as I do not have the time to dedicate to do it correctly.
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      06-01-2007, 01:00 PM   #37
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Brilliant.

BMW paid some guy a lot of money to design that... but you totally made it better.

If only they had hired you instead.
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      06-01-2007, 01:35 PM   #38
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Brilliant.

BMW paid some guy a lot of money to design that... but you totally made it better.

If only they had hired you instead.
Talk to us when you have a 335.
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      06-01-2007, 01:40 PM   #39
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Quote:
Originally Posted by Walked U View Post
+1 i hear my turbos spool with the ITG filter. Its a lot louder.
This is good to hear.
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      06-01-2007, 02:11 PM   #40
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Quote:
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Talk to us when you have a 335.
Noted. I'll come back when I forget that there are complex fluid mechanics at work that have probably been calculated and optimized.
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      06-01-2007, 02:19 PM   #41
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Quote:
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Noted. I'll come back when I forget that there are complex fluid mechanics at work that have probably been calculated and optimized.
In defense, the original designers were also concerned with sound as well as performance with the prior possibly getting the most attention.

But in this case, I doubt the fins provided any real sound suppression.
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      06-01-2007, 02:41 PM   #42
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In defense, the original designers were also concerned with sound as well as performance with the prior possibly getting the most attention.

But in this case, I doubt the fins provided any real sound suppression.
The bar is to help hold down the filter, and I think the fins are there to help draw air across filter more evenly for longer filter life (at the expense of peak flow).
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      06-08-2007, 11:18 PM   #43
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terry c5 guys have zip tie mod. remove the lid and use long zip ties to hold filter down. i havent looked at my lid on the 335 but is that something thats possible?
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      06-09-2007, 01:44 AM   #44
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terry c5 guys have zip tie mod. remove the lid and use long zip ties to hold filter down. i havent looked at my lid on the 335 but is that something thats possible?
Yeah I used to do that. On this car the filter is under the hood so it won't work.
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