02-07-2015, 01:48 PM | #23 | |
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02-07-2015, 02:04 PM | #24 |
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02-09-2015, 07:54 PM | #25 |
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First, I am assuming we agree that MPPK or not the air filter element is the same. With this assumption, the only debate is on the dirty side of the filter.
Looking at the intake tract, it is easy to show how the MPPK lower airbox provides a much larger air inlet than the OE setup. Part 15 in the image below shows a small “intake grill” that is only 50% open! Sure BMW’s engineers could have specified that dealers remove that grill as part of the MPPK, but all the man hours would be unacceptably expensive. The cheap and easy way to open up the inlet to the air filter was to go old school and just punch a hole in the lower airbox. This results in an easy 300% larger opening… How can this not be an improvement over OE? Please note I am not making any comparisons to a “proper” aftermarket intake. Thanks.
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02-09-2015, 08:22 PM | #26 |
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Its open, but I'm not sure if its taking in any extra air. That hole is facing the back of the headlight, and theres not a lot of space back there for air flow. I think the hole is purely for sound, not for induction.
The grille is stupid. I'm gonna gut that when I install the aFe scoop. Need the frame to hold the scoop in place, so I'll just cut out the mesh. Last edited by Mike_L; 02-09-2015 at 08:27 PM.. |
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02-09-2015, 08:27 PM | #27 | |
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BTW... The intake grill is actually taking advantage of a positive air pressure area in front of the radiator (behind the kidneys).
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Last edited by Dog Face Pony Soldier; 02-09-2015 at 08:37 PM.. |
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02-09-2015, 08:36 PM | #28 | |
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If I had a stock box, I'd gut it to see what happens. But the MPPK box is pretty pricey, so I'm not cutting it up. |
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02-09-2015, 08:40 PM | #29 | |
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02-09-2015, 08:59 PM | #30 | |
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The only way to know if it makes a difference is to do pressure testing in the bottom of the box, to see if theres a vacuum being created at WOT, and if there is, if its any different with the different airboxes. No vacuum, no restriction from the box or ductwork. Could also test it further up the line to see restrictions there. |
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02-10-2015, 04:06 AM | #31 |
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When I fitted my AFE ram air scoop on my m135i, the intake grille [part # 15] was 100% pass thru mesh, not 50% as implied in an earlier post.
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02-10-2015, 05:32 AM | #32 |
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Well the opening imo is only to get some additional sound like you get from an open intake. Most air will come from the normal entry.
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02-10-2015, 07:07 AM | #33 | |
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I know this thread has moved on a bit from the original topic of the carbon filter glued to the paper filter in these pictures, but I just wanted to note that I got the MPPK installed in my 2014 (Manufacture date 5/14) 335 yesterday and it did NOT have the carbon portion of the filter. I specifically checked for it this morning before I left for work. I was all ready to order a K&N filter, but I might hold off for a while now because I don't have the carbon filter.
I can also see what my buddy has in his M235. I would assume he has the same intake as the MPPK, but I could be wrong. Quote:
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02-10-2015, 01:38 PM | #34 | |
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02-10-2015, 01:45 PM | #35 | |
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02-10-2015, 02:21 PM | #37 |
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02-10-2015, 03:24 PM | #38 |
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02-10-2015, 10:00 PM | #40 |
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i don't have MPPK in mine (2015 435i conv) but i just check and its there ( the carbon thing). I also notice that there is an opening like in the air box of the MPPK but its a little different since its design to open and close with acceleration (i think) because its basically the same hole but with a restrictive lid that opens with push. (i don't really know if that is standard) i thought NON MPPK had no hole in the air box (also the hole its not red, its all black). So question, is that mechanism standard or new for 2015?
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02-11-2015, 06:55 AM | #41 |
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I also re-checked my filter this morning and there is no felt layer in my airbox. It is not attached to the filter, and it is not laying anywhere in the box.
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02-11-2015, 07:51 AM | #42 |
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For those who have looked inside their stock airbox do you remember seeing dirt at the bottom? Supposedly the design of the box is really good at dropping larger stuff out so it doesn't have to get trapped by the filter.
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02-11-2015, 08:00 AM | #43 |
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mesh was present but none of it blocked off
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