[UhhItsANT]

Originally Posted by thejeremyman9

You mean the silver part right after the filter? That's the most important part of the intake as it mimics the OEM MAF housing shape, which is critical to ensure accurate MAF readings...

Yeah that silver part lol. My mst intake and inlet is arriving next week. Thinking of getting the AFE air scoop too. Do you recommend that or have another brand?

[boosted14]

I went with the turbosmart diverter with a injen/greddy hybrid intake. Its the best sounding on a bmw that i have ever heard, and there is no beating foam element filters.

[boosted14]

Paper filter - smallest particle filtered 30 micron. Dust clogs paper rapidly and by 15k miles flow can be reduced by as much as 70%.

Oiled cloth - smallest particle filtered 45 micron. Lets a lot of dirt through but flows well when clean.

Oiled foam - smallest particle filtered 5 micron. Foam provides better filtering and has a greater filtration depth so doesn't clog as quickly as paper. 5000 miles cleaning interval recommended.

[boosted14]

Most my friends drive bmw's and they have all switched to foam element. Here is a N54 during an engine swap with ramtech foam element filters.

[mike@x-ph.com]

Originally Posted by boosted14

I went with the turbosmart diverter with a injen/greddy hybrid intake. Its the best sounding on a bmw that i have ever heard, and there is no beating foam element filters.

Looks good

[thejeremyman9]

Originally Posted by AntBabeee

Yeah that silver part lol. My mst intake and inlet is arriving next week. Thinking of getting the AFE air scoop too. Do you recommend that or have another brand?

I don't run a scoop. It might direct some more "cold" air into your intake area if you aren't running a closed intake setup but its effect is probably going to be negligible.

[UhhItsANT]

Originally Posted by boosted14

I went with the turbosmart diverter with a injen/greddy hybrid intake. Its the best sounding on a bmw that i have ever heard, and there is no beating foam element filters.

that filter looks cool, do you have audio clips?

[boosted14]

I will get them sometime tonight

[mike@x-ph.com]

Originally Posted by boosted14

I will get them sometime tonight

[AmuroRay]

Originally Posted by boosted14

I went with the turbosmart diverter with a injen/greddy hybrid intake. Its the best sounding on a bmw that i have ever heard, and there is no beating foam element filters.

I'll believe it when I hear it. New BMWs sound like vaccum cleaners, and my buddies E30 325i with the M20B25 sounded like a sewing machine. I loved it.

[GPM]

Originally Posted by AmuroRay

I'll believe it when I hear it. New BMWs sound like vaccum cleaners, and my buddies E30 325i with the M20B25 sounded like a sewing machine. I loved it.

I've never understood the appeal of a loud sucking sound, unless its tolerated for the benefit of power gain. But, obviously many disagree as intakes seem to sell quite well.

[AmuroRay]

Originally Posted by GPM

I've never understood the appeal of a loud sucking sound, unless its tolerated for the benefit of power gain. But, obviously many disagree as intakes seem to sell quite well.

I don't get it either. My M52 and N52 both sounded pretty good, with nice bassey exhaust (the M52tu had a Super Sprint Muffler)

Newer cars just sound so artificial and kinda boring - or they are all intake noise with nothing from the exhaust.

[johnung]

Originally Posted by thejeremyman9

I don't run a scoop. It might direct some more "cold" air into your intake area if you aren't running a closed intake setup but its effect is probably going to be negligible.

I was skeptical also until I recently read the Instructions at this link below. I didn't realize that the stock vent that directs front grill air is at a 90 degree angle to the air flow. So it is not getting that direct forced cold air flow. In that respect an air scoop at that 90 degree opening that is redirecting frontal air has to increase cold air flow to the intake box area. Check out the photos in the aFe air scoop instructions at the link below. I may try one. I can't see how it could hurt and it might help.

https://afepower.com/afe-power-54-12...amic-air-scoop

[AmuroRay]

Originally Posted by johnung

I was skeptical also until I recently read the Instructions at this link below. I didn't realize that the stock vent that directs front grill air is at a 90 degree angle to the air flow. So it is not getting that direct forced cold air flow. In that respect an air scoop at that 90 degree opening that is redirecting frontal air has to increase cold air flow to the intake box area. Check out the photos in the aFe air scoop instructions at the link below. I may try one. I can't see how it could hurt and it might help.

https://afepower.com/afe-power-54-12...amic-air-scoop

I have the CF version from Evolve. Maybe I should log and see how (if) it works..

[johnung]

Originally Posted by AmuroRay

I have the CF version from Evolve. Maybe I should log and see how (if) it works..

Do you have a link for it? Couldn't find it. Thanks.

[AmuroRay]

Originally Posted by johnung

Do you have a link for it? Couldn't find it. Thanks.

https://www.evolvetuning.us/catalog/...f20-f21-m135i/

Let me take a picture. I paid WAYYYY less (as I just bought the scoop from another member.) We should make one out of ABS plastic or 3D print it.

Edit: pictures. And yes, it’s very dirty.

[thejeremyman9]

Those scoops might have some sort of a ram air effect at high speeds with a closed airbox but if you have MPPK or anything else that would be negated. I would be seriously surprised if you could see anything quantitative in testing. There's also discussion about removing the OEM grate at the airbox intake to reduce restrictions, but i find both unncessary with MPPK airbox since you have the 2nd opening. I dont want to be forcing debris or rain or anything into my airbox anyways.

[AmuroRay]

Originally Posted by thejeremyman9

Those scoops might have some sort of a ram air effect at high speeds with a closed airbox but if you have MPPK or anything else that would be negated. I would be seriously surprised if you could see anything quantitative in testing. There's also discussion about removing the OEM grate at the airbox intake to reduce restrictions, but i find both unncessary with MPPK airbox since you have the 2nd opening. I dont want to be forcing debris or rain or anything into my airbox anyways.

All I Can say is that I ran it with the Dinan, and dryflow and that area was particularly dirty when it came time to clean the filter.

I got it because it mostly looked cool, but I never noticed anything when I added it. You'll also not in the picture it looks like it blocks a portion of it, but when I installed it, it looked pretty flush.

[johnung]

Originally Posted by thejeremyman9

Those scoops might have some sort of a ram air effect at high speeds with a closed airbox but if you have MPPK or anything else that would be negated. I would be seriously surprised if you could see anything quantitative in testing. There's also discussion about removing the OEM grate at the airbox intake to reduce restrictions, but i find both unncessary with MPPK airbox since you have the 2nd opening. I dont want to be forcing debris or rain or anything into my airbox anyways.

For a ram air effect, wouldn't the air scoop have to be attached to the air opening on the air filter box? I have the impression that the scoop just forces more cold air into the open area in front of the air box openings. So it would also help my MPPK lower airbox with dual openings. See photo.

I wouldn't want a grill mounted scoop directly attached to my airbox for fear that in a flood situation with water splashing into my grill that an attached scoop could force water into my engine.

[thejeremyman9]

Originally Posted by johnung

For a ram air effect, wouldn't the air scoop have to be attached to the air opening on the air filter box? I have the impression that the scoop just forces more cold air into the open area in front of the air box openings. So it would also help my MPPK lower airbox with dual openings. See photo.

I wouldn't want a grill mounted scoop directly attached to my airbox for fear that in a flood situation with water splashing into my grill that an attached scoop could force water into my engine.

The scoops are directly attached to what you call "stock air hole" and do in theory force air into the airbox. They can also force anything else... debris, rain, water, etc.

The whole "cold air" thing is another area of debate. All my intake testing showed that the temperature of the intake air had zero impact on IATs measured post-IC, so a open air underhood intake didnt show higher IATs than a closed box intake. In theory i would argue if you are sucking in very hot air (imagine a filter right on our turbo which is next to manifold) then you might heat soak your IC faster but under most conditions the air temp at the filter seems to not be relevant for IATs

[johnung]

Originally Posted by thejeremyman9

The scoops are directly attached to what you call "stock air hole" and do in theory force air into the airbox. They can also force anything else... debris, rain, water, etc.

The whole "cold air" thing is another area of debate. All my intake testing showed that the temperature of the intake air had zero impact on IATs measured post-IC, so a open air underhood intake didnt show higher IATs than a closed box intake. In theory i would argue if you are sucking in very hot air (imagine a filter right on our turbo which is next to manifold) then you might heat soak your IC faster but under most conditions the air temp at the filter seems to not be relevant for IATs

See I'm under the impression that the side facing vent that the air scoop is attached to, and the stock air hole on the stock air box are not attached. That's what I as told by someone who has the aFe air scoop.

Haha, it's too cold right now or I would go outside and start taking my car apart.😀

[AmuroRay]

Originally Posted by johnung

See I'm under the impression that the side facing vent that the air scoop is attached to, and the stock air hole on the stock air box are not attached. That's what I as told by someone who has the aFe air scoop.

Haha, it's too cold right now or I would go outside and start taking my car apart.😀

They are attached. The airbox connect to the grill vent by an "arm."