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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 09-15-2004, 06:19 PM   #1 (permalink)
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has anyone done a 535i AFM upgrade? Does the air box fit? Was thinking about using the 5 air box instead of a cone filter. I just finnished making RAM AIR for my stock box and it works really good.
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Old 09-15-2004, 06:43 PM   #2 (permalink)
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Originally posted by Bimmin'88@Sep 15 2004, 06:59 PM
has anyone done a 535i AFM upgrade? Does the air box fit? Was thinking about using the 5 air box instead of a cone filter. I just finnished making RAM AIR for my stock box and it works really good.
Awesome...no i have not yet tried that AFM so i say give it a shot i have only heard good things about it
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Old 09-15-2004, 06:51 PM   #3 (permalink)
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I've been doing some research on it and it sounds really good. Up to six hp with higher flowing injectors @ 4 bar. I need to get to the salvage yard for a 5 AFM and air box.
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Old 09-16-2004, 02:53 AM   #4 (permalink)
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give some details about your ram air setup
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Old 09-16-2004, 04:53 AM   #5 (permalink)
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ya i got to thinking about that i wanna see it too...
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Old 09-16-2004, 11:12 AM   #6 (permalink)
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Here's a pic of the intake. This photo really doesn't do it justice, looks real good. Now don't laugh I found all the materials a the Depot.

4" to 3" flexible reducer, which fits soo perfect I didn't have to bolt it on.
Small piece of 4" pvc pipe. the inner ring for the 1/4'x1/4" mesh.
1 length of 3" flexible "Fart Fan" ducting (aluminum). This slips rigth over the air inlet tube on the stock air box and inside the 3" side of the reducer. Baisicaly the hardest part was figuring out what would work together. Once that was done this project took about 20 minuts to complete and it only cost $16.00.

I have seen a number of setups where they make the screen for the high beam and they create a box in the engine compartment and use a cone filter. But I'm starting to think that maybe this is not as efficient. Especially when upgrading the AFM. Plus you get a stock "sleeper" look.
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Old 09-16-2004, 12:16 PM   #7 (permalink)
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so the air still has to go through the stock air box and the stock panel filter?
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Old 09-16-2004, 12:30 PM   #8 (permalink)
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Right now it is. I'm going to look for a K&N to improve air flow throught the stock box.

Hers my thinking on this- A cone filter will alow more air in But, the main restriction is AFM and using a cone filter without the heat sheilding can actually lessen your hp. A cone filter with shielding is efficient but, I also think that you cannot get a tight enough seal to maximize the ramming of air into the intake. This were I think a K&N with a tightly sealed intake that maximizes the ramming of cold air would be the most efficient.


check this site out, lots of tasty tidbits.

www.davelength.net
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Old 09-16-2004, 03:30 PM   #9 (permalink)
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here check out this site its all about the amf switch

http://www.davelength.net/car/bigsix.html
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Old 09-19-2004, 10:16 AM   #10 (permalink)
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New here obviously. I picked up a M30 afm from a salvage yard for 75 beans. I'm in the process of polishing it up, stripping the electronics now. Its a slow painful process, but a dremel takes care of the big bits. I still need the FPR, injectors, air filter, af guage, and heat sheield...etc to complete but i'm getting there, i'll keep everyone updated.

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Old 09-20-2004, 01:21 AM   #11 (permalink)
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ken, i sent you a pm.
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