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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 06-19-2014, 01:24 AM   #1
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"Double" intake 330i?

Well, I've been shopping around for intakes and noticed a lack of dual filter options. I got to thinking why-not or why this may be and figured a double option must conflict with the most effective way to draw air or poses a maintenance challenge.

Does anyone know why I'm unable to find anything?
Is there a mathematical reason there isnt something like this inside the airbox?

Anyway, I'm really just thinking out loud on the internet. I think it looks pretty cool and figure theres more surface area on the filters (could be way off on that). Chime in if you have a degree in aerodynamic engineering
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Old 06-19-2014, 03:33 AM   #2
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for a given width (space envelope) the cross sectional surface area of the two filter setup inlet tubes is half as much despite surface area of filter element being the same....

also i big filter is cheaper than two little ones most likely

Last edited by reggid; 06-19-2014 at 03:35 AM.
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Old 06-19-2014, 04:18 PM   #3
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The one filter used on common CAI for our cars flows more than enough. Even if a dual filter setup was made that had more capacity it would be wasted. More expense, more complicated fitting getting them in the same area as a single one, more to clean, etc...
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Old 08-13-2014, 12:26 PM   #4
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Correct me if I'm wrong, but that pic looks like it fits on a carb. If that is the case, then that is why it's a dual filter; the single cone doesn't offer enough surface area for the flow needed for a larger engine.

Keep in mind, on the M54, all the air taken in will be routed back into a single pipe, through the MAF, and into the tb. Without dual tb's, there is really no need for dual filters.

Last edited by Bino5150; 08-13-2014 at 12:27 PM.
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air, airbox, double, dual, filter

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