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Author Topic: Airbox Drilling  (Read 10858 times)

sheepdog

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Airbox Drilling
« Reply #15 on: April 02, 2006, 12:05:52 AM »
I cut a hole in the left side and a bit of the bottom on the left as well for mine.

Did it help, I am sure it did.

There was a retrofit(?) from BMW to the air hose from the box to the front of the car which added a spring, without it, that hose collapses. Putting holes in the box removes that possibility.

Like E9nine said, at stops, yes hot air is sucked but when moving it should be fine. It definately breathes a bit better.

As for noise, with the way mine is, under normal driving it is pretty quiet. at 1/2 to 3/4 throttle though it really gets noisy, but who cares when you are on it.

I like to say it scares women and small children. You can hear me coming if I am on it for a quite a distance (good for getting deer out of the road), but cruising is barely above stock noise levels. I like it. Definately turns heads around town when you punch it.
« Last Edit: April 02, 2006, 12:12:15 AM by sheepdog »
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"When trouble arises and things look bad, there is always one individual who perceives a solution and is willing to take command. Very often, that individual is crazy." --Dave Berry

///Motorsport

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Airbox Drilling
« Reply #16 on: April 02, 2006, 06:34:24 PM »
Quote
it gets old after a while of daily commuting.

on my wrx i have an electronic cutout so for around town and police its stock subaru quiet and when i want some angry noises i have cat-less exhaust off the 3" downpipe..
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M42boy

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« Reply #17 on: April 02, 2006, 09:45:48 PM »
I'm swiss cheezing my airbox next time it comes out and new "upgrade" air cleaner going in.  Why not!!!  Should at least sound cooler, if nothing else.
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D. Clay

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By the way.
« Reply #18 on: April 03, 2006, 12:18:55 AM »
Does anyone know where on realoem.com that baffle behind the headlights is? I am a believer regarding the intake air being as close to ambient as possible. My baffle is also missing. I've had the outside air temp sender under the hood and here in Texas it will go to 108-110 degrees at a red light.
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bullmand

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Airbox Drilling
« Reply #19 on: June 28, 2006, 01:53:58 PM »
Can someone post pictures of a drilled airbox? I've done the Fogg thing on my M44 318ti, but the airbox on my new-to-me '91 318i is much different than that one.
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M42boy

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« Reply #20 on: June 28, 2006, 02:54:06 PM »
Quote from: D. Clay
Does anyone know where on realoem.com that baffle behind the headlights is? I am a believer regarding the intake air being as close to ambient as possible. My baffle is also missing. I've had the outside air temp sender under the hood and here in Texas it will go to 108-110 degrees at a red light.

I've got the trim piece that goes behind the driver's side headlight soaking in my bathtub right now.  I can get you a part number when I get home.  

Mine were all dirty and needed a bath!  :cool:

Does anyone know where to get that screen piece that replaces the driver's side high beam?  That's gotta help flow fresh air!
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e9nine

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« Reply #21 on: June 28, 2006, 03:30:31 PM »
Quote from: M42boy
Does anyone know where to get that screen piece that replaces the driver's side high beam?  That's gotta help flow fresh air!

DIY from an old speaker grille or chicken wire style mesh from Home Depot, Loews etc. I made one from a 6" or 5.75" speaker grille but junked it as it didn't "flow" right to my tastes :rolleyes:
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sheepdog

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« Reply #22 on: June 28, 2006, 04:51:05 PM »
Just cut out the front a bit and the fender side, while maintaining strength.

That is all you need to do. Mine sounds incredible.
Sounds better than a cone filter, that is for sure.
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"When trouble arises and things look bad, there is always one individual who perceives a solution and is willing to take command. Very often, that individual is crazy." --Dave Berry

///Motorsport

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Airbox Drilling
« Reply #23 on: July 02, 2006, 05:37:55 PM »
can't you just de-baffle the airbox?  and i dont think cone-filters are ricey if they have proper heat shielding. all it takes is some duct tape, tools, and aluminium from ACE.
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Minkee

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Airbox Drilling
« Reply #24 on: July 02, 2006, 09:37:32 PM »
well guys i owned a car for 4 years with a drilled airbox.  Granted it was a 8v vw, the drilled box did increase throttle response, but not necessarly the power overall.  Honestly a cone filter sucks hot hair, but its more air.  You'll get a little performance boost at 55+, but not much power gains at lower speeds.
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gjuuu

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« Reply #25 on: July 03, 2006, 12:41:54 AM »
Quote from: ///Motorsport
can't you just de-baffle the airbox?  and i dont think cone-filters are ricey if they have proper heat shielding. all it takes is some duct tape, tools, and aluminium from ACE.


Here is mine.....I have posted this on every other forum I visit so why not here as well...hahahha




At WOT it screams ..... and looks so much nicer than stock
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D. Clay

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Screamin'
« Reply #26 on: July 03, 2006, 06:24:41 PM »
Quote from: gjuuu
Here is mine.....I have posted this on every other forum I visit so why not here as well...hahahha

At WOT it screams ..... and looks so much nicer than stock

Very good looking and also very functional. A guy on another forum told me once that the air temperature didn't matter because the computer adjusted the air/fuel mixture back to stoichiometric. I've even seen those cone filters right behind the radiator resulting in a net HP loss. Going from 110 to 80 degree air results in a 3-4 HP gain from an M42. There's a high pressure area at the base of the windshield that is really good for an air intake. It's hard to access unless you have a track car that you can cut up a little and can forgo  incoming air to the  passenger compartment.
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E30_318is

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« Reply #27 on: November 12, 2008, 01:22:10 PM »
I also swiss cheezed my airbox (cause i bought anothetr oem. airbox and MAF for ~ 2EUR :D ).  
Im pretty sure that the throttle response increased.Sound is also 100x better than stock.Im going to drill more holes to scare people away...

I drilled 76 4mm diameter holes, like in this pic:


http://www.motortraders.net.au/groups/group.asp?group=1&menu=1&article=3
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tjts1

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Airbox Drilling
« Reply #28 on: November 12, 2008, 02:04:16 PM »
I have to ask. Why not just build a real CAI? It sounds great and it actually helps the engine breath.
http://www.m42club.com/forums/showpost.php?p=48698&postcount=9
« Last Edit: November 12, 2008, 05:06:51 PM by tjts1 »
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Sold but not forgotten

This is whats wrong with your car.
http://www.m42club.com/forums/showthread.php?t=2742
[/thread]

Hodge

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Airbox Drilling
« Reply #29 on: November 12, 2008, 08:23:54 PM »
Anyone Swiss cheese an E36 M42 airbox?

This sounds so intriguing. I have heard of it before, but never looked into it.

Even if only for sound improvement, I'd still do it.
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1995 E36 318isc
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