Mesh Removal From AFM = KW Increase?

[-Joel-]

Does the removal of the Mesh which is in front of the AFM and rear actually make a noticible change to response in an R32 GTS-T?

[Doctor]

G'day Joel,

I have questioned the same thing, surely it must restrict the airflow from the air filter. Remove it and find out, and then tell me.
As for how much power it is robbing I imagine it could only be a kilowatt or two.

Cheers,
Doc

[-Joel-]

I am known as the FIDDLER.. So i guess i might do just that then let u know ))

[blacksky33]

i would not touch the mesh if i were you it takes just 1 bit of crap to stuff up your hot wire and then you can pay $200 atleast for a new afm

[MarioGTR]

Never, ever, remove the fine mesh from the air flow meter. It is there for a reason.

Yes, it does restrict flow. It is there to disrupt laminar flow and induce turbulence.

Think of the grate in your tap on your kitchen sink, same principle, it is there to add turbulence to the water so that the flow, no matter how small, will use the entire width of the pipe.

As the element that measures the intake air stream is small and sits in the middle of the pipe, if you didn't have the mesh there, you'd get a natural boundary layer of air sticking to the outer side of the pipe and thus all measurements would be wrong.

Mario.

[wil25t]

damn i accidently poked a hole in the mesh when i was installing the pod filter... hope it doesnt make ne diff

[TINDUCK RACING]

damn I accidentally took mine off and threw it away ages ago.......
.......NOW you tell me........Doh!!!

[flupstar]

*points at tinduck and laughs*

sorry

[Dak]

Mario is pretty much smack on there, the reasons he gives are dead on.

[WDRacing]

Not to go against anything Mario said. But I have 4 or 5 MAF's in the garage. Some with and some without the screens. I haven't noticed any performance loss or gain. I do believe though that it might tend to make your car run a bit rich without the screens installed. Which is never good. I can't be sure it was the MAF causing it but it could have been.

WD

[MarioGTR]

Your very lucky, I'd say!

It could be just that your airfilter is right in front of the AFM, in which case, the short tract length would preserve the disruption to airflow as the air is drawn through the fine mesh of the air filter itself.

I performed testing of this many moons ago, and found that the AFR would significantly be changed due to incorrect measurments from the AFM - in some cases so much so that the test engine would run very lean (over 13:1)...

Mario.

[NIF]

I would have to agree with both points about the mesh. If it came with the mesh you can bet that sensor was calibrated as such. I have also seen sensors come without mesh but to support Mario the actual sensor was on the sidwall.

[Ethan_R33]

mario, my air flow meter was buggered so i got another one to replace it, and everything was good. The one i replaced it was 2nd hand, and it already had the mesh removed, but my car runs fine.
I understand what you said about having the mesh, but howcome mine still runs fine??

[NIF]

Teh effect of the missing mesh might be very minimal, they could also cause you to run rich/lean. Finding a replacement of sorts might be a good idea if you properly secure it.

[WDRacing]

My Filters are always mounted directly in front of the MAF.

WD