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BMW 3-Series (E90 E92) Forum
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Stock DV's to atmosphere
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05-18-2013, 06:19 PM | #2 | |
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05-18-2013, 07:26 PM | #4 |
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05-18-2013, 09:35 PM | #5 | |
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05-18-2013, 09:51 PM | #6 |
Colonel
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I'm going to state the obvious but as long as you close the holes on the intake you should be fine.
Helix sells a kit with small filters for the DVs, and plugs for the intakes
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05-18-2013, 11:02 PM | #7 | |
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05-18-2013, 11:19 PM | #8 |
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Less then 10 bucks diy :
http://www.e90post.com/forums/showthread.php?t=799821 |
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05-19-2013, 08:07 AM | #10 |
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Haha I love it.. I don't think the cops appreciate it but oh well.. How about you?
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05-19-2013, 08:03 PM | #12 |
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just buy forged diverter valves or a blow off valve instead of half assing the factory diverters...
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05-19-2013, 09:37 PM | #13 |
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Not any more of a problem than recirculating. Go for it, you may not be impressed by the sound though. These valves were not made by BMW to show off sound, they were simply made to be functional. Expect more of a woosh sound.
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05-19-2013, 09:52 PM | #14 |
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05-20-2013, 09:11 AM | #15 |
MMM
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You will need small filters to go on the DVs. At idle they are nearly wide open, sucking in unfiltered air. I've done this before and while it does sound cool for a few days, I put it back to factory.
Since I'm running meth, any leftover meth will shoot out into the engine bay. I'd rather recirculate that back into the intake. This goes for blow by oil too |
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05-20-2013, 11:21 AM | #16 | |
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These vales get pretty gunked up just from being DI. Let alone the oil blow by oil. Last thing you need is more oil in your intake charge or intercooler. Get an OCC |
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05-21-2013, 09:27 AM | #17 | |
MMM
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05-21-2013, 09:51 AM | #18 | |
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05-21-2013, 01:06 PM | #19 | |
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That said some small filters wouldn't hurt anything either, and it might put your mind at ease if you're paranoid.
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05-21-2013, 01:23 PM | #20 |
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I've been running my Forge DVs vented to atmosphere with no filters for about 7 months now with no ill effect. No oils spraying into the engine bay either (not sure where you got that myth from).
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05-21-2013, 02:23 PM | #21 |
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running vented to atmosphere too. it just starts venting air moment ur foot starts easing off the gas.
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05-21-2013, 03:09 PM | #22 |
MMM
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The OP is asking about stock DVs. If you look inside the recirculating hoses there is evidence of oil residue. Now if you remove the hose and vent to atmosphere, the blow by oil will be vented into the engine bay as well. How much oil blow by is dependent on mileage and rings condition.
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