Author Topic: Looking for cold air intake (Read 9021 times)

elementskater_xx · « **on:** May 04, 2008, 08:52:19 PM »

I have searched high and low for a cold air intake for my 1992 318is i can not find it. I can't find any intake for that matter. Anyone got some reference or know where i can get one?

haledj · « **Reply #1 on:** May 04, 2008, 09:05:27 PM »

http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0344&hg=13&fg=20

tjts1 · « **Reply #2 on:** May 04, 2008, 09:10:13 PM »

Quote from: elementskater_xx;48596

I have searched high and low for a cold air intake for my 1992 318is i can not find it. I can't find any intake for that matter. Anyone got some reference or know where i can get one?

You can make one.

Quote from: haledj;48598

http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0344&hg=13&fg=20

Take your outside air temperature sensor from the left side brake duct and stick it inside the airbox to monitor the intake air temperature for a week or so. The average intake temp varies from 10f above ambient at highway speeds to 40f above ambient in stop and go traffic. There is nothing wrong with the stock airbox but you can improve on the stock intake tube (part 12 the diagram). Part 12 is also the biggest source of restriction in the stock intake system. It starts with a 1.75" hole at the back of the headlights and ends 3" at the airbox even though the total area of the throttle plates is much bigger.

nomad · « **Reply #3 on:** May 04, 2008, 10:12:50 PM »

I got a MAF adaptor for $11 on ebay and I'll use a K&N filter I have sitting around just because I have it already. I'll make an air box for it and remove the headlight cover. If I didn't have it i'd get a K&N drop in filter and mod the front of the airbox.

tjts1 · « **Reply #4 on:** May 05, 2008, 01:18:06 AM »

Quote from: nomad;48610

I got a MAF adaptor for $11 on ebay and I'll use a K&N filter I have sitting around just because I have it already. I'll make an air box for it and remove the headlight cover. If I didn't have it i'd get a K&N drop in filter and mod the front of the airbox.

Are you sure about that K&N?
http://www.bolhuijo.com/airflowtest/
I like your idea of using the high beam but my approach is a little different. I'll post some pics when I have it finished.

nomad · « **Reply #5 on:** May 05, 2008, 02:02:59 AM »

hey, pretty cool!

swiss318is · « **Reply #6 on:** May 05, 2008, 05:32:45 AM »

hmm..pretty interesting..

nomad · « **Reply #7 on:** May 05, 2008, 10:24:05 AM »

I've got a cheap fram in the box right now, and the K&N is free. So I'll probably use it for a bit. Once I get suspension done and can have more fun with it maybe I'll look into a large intake tube into the stock box.

tjts1 · « **Reply #8 on:** May 05, 2008, 09:52:29 PM »

I had some time on my hands tonight so I slapped this together because it beats driving around with 3 headlights everywhere.
Take one sealed beam frame.

And one 6" strainer ($3 at ross.. LOL)

And epoxy the 2 together.

Spray paint the inside of the headlight bucket silver and reinstall minus the headlight. People with elipsoids, you're on your own.

The paint work doesn't quite match the brightness of the low beam reflector with camera flash, but under normal day light they are damn close. I still have a dual filament bulb on the outside so 3 bulb 300w highbeam I can live with.

Then get about 14" worth of 3.25" ID tubing (McMaster) and an over sized hose clamp from my old volvo.

The 3.5" OD of the hose fits perfectly into the back of the headlight bucket.

And done. Now before anyone starts going off about how you would have to be going 160mph to get any effect from a ram air intake and all the other R3V spawned BS, may I suggest some reading.

http://autospeed.com/cms/A_2518/article.html
http://www.autospeed.com/cms/A_0663/article.html
http://www.mz3.net/articles/149.html

gjuuu · « **Reply #9 on:** May 07, 2008, 06:07:09 AM »

hey tjts1, that's pretty cool.

if you sprayed that silver it would probably look like you still had the light in there - and not attract attention from the cops

Cobra Jet · « **Reply #10 on:** May 07, 2008, 09:22:12 AM »

Quote from: gjuuu;48813

hey tjts1, that's pretty cool.

if you sprayed that silver it would probably look like you still had the light in there - and not attract attention from the cops

Pulling out your high beam headlights (on a vehicle w/ 4 front headlights) or modifying the front of the vehicle within reason is not a crime. As long as he still has the outer "low beam" headlights (or any type of front headlight for that matter) for driving at dusk or night and retains the appropriate parking/blinker lights, it's a non-issue.

Very good air intake idea though!

nomad · « **Reply #11 on:** May 07, 2008, 10:20:47 AM »

Looks like I'll have to stick with the stock airbox. The ABS module is in the way. Funny thing is that the ABS doesn't work so it's a huge waste.

Guess I should check the relay. Probably something more expensive though.

tjts1 · « **Reply #12 on:** May 07, 2008, 11:06:10 AM »

Yeah, I think I will paint it silver at some point. Right now I just enjoy driving it. You wouldn't believe the throttle response especially over 30mph. Still rocking the 87 octane :p

Quote from: nomad;48819

Looks like I'll have to stick with the stock airbox. The ABS module is in the way. Funny thing is that the ABS doesn't work so it's a huge waste.

The ABS got in the way of this setup as well. It was a bit of a squeeze but it worked... just.

batsbats · « **Reply #13 on:** May 07, 2008, 11:13:12 AM »

Quote from: tjts1;48827

Yeah, I think I will paint it silver at some point. Right now I just enjoy driving it. You wouldn't believe the throttle response especially over 30mph. Still rocking the 87 octane :p

The ABS got in the way of this setup as well. It was a bit of a squeeze but it worked... just.

87? No pinging?

Cobra Jet · « **Reply #14 on:** May 07, 2008, 12:38:06 PM »

Quote from: batsbats;48829

87? No pinging?

here's a new "87 octane" thread:

http://www.m42club.com/forums/showthread.php?t=5569