Somehow I ended up on this page, and thought it might be useful to some to post it and possibly have it as a sticky.
PS. What is no. 3???
http://forums.bimmerforums.com/forum/showthread.php?544874-Official-M50-Manifold-Swap-Thread
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Somehow I ended up on this page, and thought it might be useful to some to post it and possibly have it as a sticky.
PS. What is no. 3???
http://forums.bimmerforums.com/forum/showthread.php?544874-Official-M50-Manifold-Swap-Thread
That's a handy page.
Number 3 is Cold air intake.
Ah! Cheers. They really love abbreviations in the USA eh? :p
Hey folks quick one for yee. Read something about removing the air box "restrictor" over on piston heads, apparently it's there to quiet down intake noise and limit the amount of air going in (in order to comply with the german tax laws - same way the m52 manifold is restrictive and so on.
According to the thread there everybody removes this and all are happy out with no issues. Can anybody confirm if I do this it has 0 negative effects on any other component / how the car runs?
I'm referring to the oval sort of funnel that goes in the air box (I didn't open mine to see but this is what I saw a picture of).
Cut it out of my IS and was only talking to Dean at the weekend and he has cut it out of his 323.
Go for it.
e36 airbox debaffle
Quote:
Originally Posted by Peter-E36
I removed it a few weeks ago, didnt think it really made a difference tbh. I'll get you a pic of it later on if you'd like? Its a ten minute job to take out, easiest to take to whole airbox off and it just clips out.
Yea would be great thanks :)
Here's a guide :wink:
http://www.bmwowner.com/forum/viewtopic.php?f=75&t=68075
Just clips out . Makes more induction noise and feels slightly better in the last 1500rpm maybe its just in my head though. But its definitely louderQuote:
Originally Posted by Peter-E36
Try it and if you dont like it just clip it back in
Will give it a go :)
Did this on my 323 and deffo sounds nice
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Forgot to send it on last night Pete, here is a pic of the baffle:
http://imagizer.imageshack.us/v2/102...0/838/cmns.jpg
EDIT: Did read something about removing the second baffle (the guide venom posted called it a trumpet) has negative effects and its there for a specific reason, I'll try dig it up but was written by a guy that seemed to know what he was talking about.
"The point of the baffle is to promote a Laminar Flow through the rest of the intake. Laminar flow is the opposite of Turbulent Flow. The Mass Air Flow sensor responds much better, and more accurately to a more streamlined, laminar flow of air through the intake system. Good cold air intakes have an inner geometry designed to promote a laminar airflow through them. Cheap intakes or homemade intakes do not.
The baffle is the BMW's design geometry that promotes consistent airflow through intake, so it can be more accurately measured by the MAF. Unless you really have a compelling reason to get rid of it, don't. While I'm grandstanding here, I would go as far as to say probably half of the people with cold air intakes on their car have lowered their performance because they haven't replaced the stock BMW design with something fundamentally better."
Thanks Cethern, yea was reading that alright, so seems the baffle above is ok to remove but not the "2nd one"? Definitely no issues with flat spots in rev range etc removing the "1st" one?
Wasnt the exact guy I was looking for but was a similar point he was trying to make.Quote:
Originally Posted by Peter-E36
Didnt notice anything, but to be totally honest didnt notice a difference positive or negative. I reckon they are both there to provide laminar air flow and has probably very little to do with restricting the engine.