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AFE air scoop - new YT "test"

7.8K views 40 replies 11 participants last post by  Jamie214  
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I was thinking about one of these for my M135i. But I was wondering whether there may be an issue in wet weather with water coming through the grille and being "scooped" into the air intake and up into the filter etc.

That said, you guys have more wet weather than I have in Oz. Any comments?
 
#7 ·
Jahjaman said:
That test is a bit silly.

In a turbo car, I assume that the physical spooling of the compressor is what helps to suck in that air from the outside.

A leaf blower simply creates positive air pressure outside the intake, but that in no way is representive how the air flows from outside into the intake.

Simple analogy is your breathing:

The benefit for that piece of plastic is in smoothening that airflow and making sure there is sufficient air volume to satisfy the amount of air that is being "sucked" in.
Jah,

As a doubter about the credibility of the test, watch this evolve YT vid..


Your assumption about turbo car is correct. Benefit of RAM AIR effect works on na and forced induction engines. My experience via jb4 logs shows scoop ram air effect helps lower IATs and load on the turbo.

You lost me on your breathing analogy - sorry but your spiel is irrelevant.

Your final point, yes something worthwhile - smoothing airflow and helping amass a greater volume into a closed intake. As I mention above, helping to build volume thru a higher flow filter to a turbo demanding tuned (remap or tuning box) levels boost works !!

BP
 
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BP

Yep you've just touched on a point I didn't consider.

Ram air effect will ensure there's sufficient positive air pressure at the point of air intake (filter).
At speeds, the ram air effect would be multiplied, whilst an intake opening at 90 degrees to the direction of air flow (aka the stock intake) would struggle with "sucking in" sufficient air.

Was completely wrong before. I should go back to school.

I think what I misinterpreted was that I thought the videos were showing that the ram air scoop would flow MORE air into the system by forcing air into the intake plenum. But actually it's just showing that the scoop will ensure sufficient positive pressure at the filter so that the turbo/engine doesn't struggle to breathe.

My bad! Ignore me.
 
#9 ·
The B58 intake point looks to have an identical opening ()

I wonder if this same scoop will fit?

But also, Marco and BP, given that the intake is a sealed system, when it rains hard and there is some water ingression, I assume it'll be caught before the filter, but have either of you observed any need to open the filter plenum and dry off any excess water build up?

I have a feeling the original intake is set up at a 90 degree angle to the direction of airflow to mitigate water ingression?
 
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Blind Pugh said:
B58 intake finishes with part 13 so parts 14 & 15 are not fitted.

B58 snorkel points straight fwd.

No problems of water ingress into either oem or Dinan CAI.
So I had a squiz whilst changing my grills.

Interestingly enough, after I opened up the flap on the driver's side, you can see that the "unfiltered air snorkel part 12" and "intake duct part 13" are there, but it just stops there? Not sure where fresh air enters that particular part of the engine bay?
Image
 
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Jahjaman said:
Blind Pugh said:
Looks like 4cyl afe air scoop might work as it fits behind driver side grille

Looks like it. Thanks

My question is, if it's blocked off from factory, where does that snorkel get fresh air from..?
According to Realoem US spec M240i have this open with an elbow and grille [item 14 and 15] to fit the location of blanked hole. 4 cyl scoop would fit US spec M240i.


From your photo, looks like M140i has item # 13 fitted - which would need to be removed to fit item 14 - a lot of phaff to fit a scoop !!!