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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 05-02-2004, 06:01 PM   #1 (permalink)
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Well, lets start out by saying the e34's intake has been debated for many a year, as to whether or not to go cold air, or bust out a K&N in the stock airbox. Being the silly teenager I am, I opted for the 100 dollar powerflow kit, offered at bavauto.com. Great company, btw. After putt-puttin around for about 2 months with it in, I came across a racing enthuseist(sp?) and his e34 540. Inside that 540 was a K&N in the stock airbox, as he stated no matter how much airflow you get, if its hot, you lose hp. Keep in mind I have the cone setup, but i was also sporting a white trash can cut in half serving as a heat shield. I then took another trip to bavuto.com and bought myself a k&n for the stock airbox and put it in.

Verdict: The cone filter gave me an awesome sound, and better throttle response. The heat shield I made for it looks mad ghetto, so it lost points there. The K&N in the airbox looks nicer, but the sound faded, making my BMW feel stock, but the power was there. I have yet to really determine that the K&N in stock airbox gives that much more hp, but I like the look, so im keeping it.

I'd have to say they are pretty much equal, with one not having the nice sound.


What are you guys running, and what do you think of my experiment?
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Old 05-03-2004, 09:55 PM   #2 (permalink)
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i am on stock filter/ airbox...

over the summer when the school is out, i plan on trying (this being a key word) to build a custom intake. we'll see how that goes.

but first i have to get a new thermostat and fan clutch...there goes around 100 dollars
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Old 05-12-2004, 09:36 AM   #3 (permalink)
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I don't know if anyone has seen this but there is some good info on air filters on this link....


http://www.bmwe34.net/e34main/upgrade/Air_filter.htm


I am running the standard set up, I have thought about a K&N but with all these different opinions about, its hard to know if its gonna make any difference. Nice bit of R&D tho..
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Old 05-12-2004, 11:53 AM   #4 (permalink)
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i dont know, it just felt like the powerflow kit just had more umph to it, as it seems the stock airbox is well, stock. The k&N filter is ok, but it just lacks what the powerflow had. Im too lazy to put the powerflo back on, plus im not sure which is better in hot weather. My next buy is going to be an exhaust, probably triflo, so well see if the airflow gets any better.
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Old 05-13-2004, 10:59 AM   #5 (permalink)
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I've been toying with the idea of a cold air intake... This may have just convinced me to attempt the project.

Hey stuka...Question for you, I just called bavauto and they dont have an intake for my vehicle, its an e34 1993 525i...How did you get yours? Did you get one for a diffrent vehicle and "fit" it? Where did you place it? some pictures would be delightful
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Old 05-13-2004, 07:45 PM   #6 (permalink)
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search for intake on bavauto.com after selecting year and model and it will find a Powerflo for 164.95. it was probably a new guy that you spoke to or something.

later
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Old 05-13-2004, 11:02 PM   #7 (permalink)
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Well, it doesnt show up for the '93 525i, but i punched in your model year ('90) and it came up, any conflicts that you can see out of this? was the engine placement diffrent at all?
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Old 05-16-2004, 04:41 PM   #8 (permalink)
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hey d3iety, i thought this post died, but i have to answer ur question. I bought my powerflo kit for 103.99 (ON SALE) and it was made especially for my car, as it came with bolt on pieces and everything to make it fit right. It came minus a heat shield (69.99) so i used a plastic trash can. It looked so bad i changed it back to stock. Hope that helps a bit.
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Old 05-16-2004, 05:37 PM   #9 (permalink)
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Thanks man, I've since decided to build my own with torque0...

Check the To: Torque thread.
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Old 05-16-2004, 08:29 PM   #10 (permalink)
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The 1990 and the 1993 have a different engine, so im not sure if they will be a perfect fit, its best just to build your own.

My intake sacrificed some torque but gained a BIT of noise and pick up in the higher RPM range (3.5k +)
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Old 05-16-2004, 08:48 PM   #11 (permalink)
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Thats all in the plan man So happy, just found my filter (hopefully)
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Old 05-16-2004, 09:14 PM   #12 (permalink)
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what filter did you find ?
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Old 05-16-2004, 09:32 PM   #13 (permalink)
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www.greenfilters.com

it looks like a decent solution

Look around, search by part then look at thier "universal" filters
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