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MR 325
10-10-2003, 02:17 PM
I currently have a cone air filter with the adapter and want to take out my high beam for a cold air system. I have never actually seen one done but I am wondering if flexable dryer hose works?! Or, would a piece of solid tubing work better?

Anyone done this on their E30??

flyingbrick
10-11-2003, 01:35 AM
smoother is better, but you probubly wont know the dff.

bimmerjim®
10-13-2003, 11:40 AM
i had this done for a time on my e30. it didnt make a bit of difference IMO.

i took out the high beam and put a flexible black 5" hose (like the silver dryer hose but made for plumbing) to the cone filter.

before i just had the cone filter with a heat sheild. if your looking for "ram air" its a myth. true "ram air" cannot be acheved below the speed of sound. if anything you may get some power increase on the highway (maybe 1 or 2 hp) but the power increace is impossible to meter on a dynamometer. i found that it gets enough cold air from the grill and headlights as long as theres a heatsheild.

Jay Stock E30
10-13-2003, 04:04 PM
sorry this is off topic...but Flyingbrick..I love your sig...its cracking me up..but maby thats because my car is the same way......

Dirty E30
03-10-2004, 12:48 AM
its not so much about performance at a h.p. standpoint, but more from a response and power efficiency(how ever you spell that word) standpoint. I had a cone filter on my car for a long time in order to feed my 3.5 MAF, however, when the outside temp started to warm up and would get on it in opperating temperatures, i would just suck in hot air that the electric fan blew off of the block. It felt almost like it bogged.

So i made a custom airbox/heatshield using thick ducting. I bent it, molded it, sealed it, and spayed the "filter" side of the shield with a high temp tollerance latex spay and removed my high beam. Problem solved.

bimmerjim®
03-10-2004, 09:31 AM
right, youll get your best throttle responce and performance from just a cone filter with a heat sheild. but youll get your best efficency from just a open filter in the engine bay.

you probibly already know this but, ill explain for those who dont.

in order for the computer to make a stoichmetric burn in the engine uses the air temp sensor and the afm to determine the volume of air incoming into the engine. cold air is dencer than warm air. so if the computer sees the lower tempature air it will provide more fuel to acomodate the more dence air. causeing gas milage and efficency to decrease and overall power output to increase. (more fuel + more air = more power) however when the computer sees warmer, less dense air, it reduces the fuel suply to mantain a stoichmetric burn, increasing gas milage and efficency but reducing overall horsepower. this is why some car manufactures produce cars with restrictive intake systems. its in effort to increase gas milage.

this is true to a point. when the horsepower becomes so low that it takes more throttle imput to reach a desired speed, it defeats the purpose of a restrictive/warm intake.

diegom6
03-10-2004, 02:32 PM
it's worthless take out the high beam for that matter....IMO :P

Bristol 335iTC
10-23-2004, 07:45 PM
Someone did a scientific test on the "ram-air" effect. They did like 180 mph with all the test equipment and got something lik 0.2 psi or something ridiculously low. Anyway, after eading the writeup you basically had to do around 750 mph to get any "boost" at all". Of course my beemer does that all the time, which is why im turboing!!!

Ram air... you mean hot air!!!

Bob Loblaw
10-23-2004, 08:22 PM
it's worthless take out the high beam for that matter....IMO :P

I agree. But I think it looks nice. ;)

http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=34&viewkey=



http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=33&viewkey=

Bristol 335iTC
10-23-2004, 08:25 PM
You can use a mini stone-chip guard to make it look nicer

DC
10-30-2004, 06:12 PM
I had headlight intake on my last 325i aswell

for your inspiration :wink:

http://bmw.zpevak.net/blau/b052.jpg

Matt325e
10-30-2004, 08:05 PM
I did both high beams on my car, but my H4 low beams have the 55/100 watt bulb, so I still have the high beam function. My high beams were the sealed throw-outs anyway.

Mr. Anderson
10-30-2004, 08:08 PM
it's worthless take out the high beam for that matter....IMO :P

I agree. But I think it looks nice. ;)

http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=34&viewkey=



http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=33&viewkey=
It also looks like you're missing a headlight.

Don't sacrifice nighttime visibility for such a low-yield mod.

Matt325e
10-30-2004, 08:16 PM
that's why I did both high beams, and painted the headlight bucket metallic silver, then put a mesh grill over it. From a distance, it looks like they're still there, but up close it looks agressive. Although, if I had the smoked headlights, the intake high beams would be gone in a heart beat.

DC
10-31-2004, 01:27 AM
bi-xenon tech. solved my problem with light :)

http://bmw.zpevak.net/blau/b042.jpg
http://bmw.zpevak.net/blau/b043.jpg

sorry for image quality :wink:

Bob Loblaw
10-31-2004, 01:37 AM
It also looks like you're missing a headlight.

Don't sacrifice nighttime visibility for such a low-yield mod.

Thanks for the warning. ;)

THe Sly
10-31-2004, 09:30 AM
it's worthless take out the high beam for that matter....IMO :P

I agree. But I think it looks nice. ;)

http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=34&viewkey=



http://www.e30tech.com/index.php?module=photoshare&func=viewimage&iid=33&viewkey=
It also looks like you're missing a headlight..

I have to say that many people do not notice the mising headlight until i tell them and yes it does look good...
SLy

e30cabrio
10-31-2004, 10:49 PM
I'm gonna do it because I want to make my car look more like a 2002. :wink: :wink:

Matt325e
11-01-2004, 10:21 PM
hey bob, what material did you use for your headlight intake cover, and where did you get it?

THe Sly
11-02-2004, 07:22 PM
Matt325e..I made both of them ...On Bob's e30 and the 87IS also.

I got the stuff from a hardware store...they use it for the exhaust fan above your stove :idea:

Matt325e
11-02-2004, 11:47 PM
thanks, I'm curently using a small chicken wire mesh :lol: