HELP... just put my finger through the MAF and killed it....

[Al Wyn]

[Rusty]

Sorry, my bad. I guess I was confused by teaching fluid mechanics for 11 years at a University.

Duh.

Oh, yeah, the world is ROUND.

But then again, you might not believe that one either.

Whilst I know nothing about you, you also know nothing about me so I suggest that you accept that there are different opinions in the world and stop being so rude. I think it's telling that you have resorted to abuse rather than showing me evidence or studies that support your arguement rather than suggesting that I do an experiment that has rather different parameters to the situation we are discussing.

I have had a quick look around and accept that a fine mesh gives a laminar flow but the mesh on the front of the MAF is quite large and this is the reason I am doubtful that it makes any real differece. However, the open weave also thankfully minimises the pressure difference and thus loss.

Finally, if this effect is so important then why did Porsche replace the mesh with a large plastic grid?

[s2_bo]

I have got s2 mafs for sale... PM me if you want an OEM one

[aesthetics]

now u got a reason to buy an rs2 maf lol

[K Simmonds]

I'm curious to know why your car seems to perform better with a VR6 MAF, could your old MAF have been past it?

[avants2turbo]

100% yes Keith... use the correct maf

but its so gona suck being slow again...

whats the worst that can happen, a couple of melted pistons...

[Al Wyn]

so are you lot convinced i need a new MAF... its much quicker with the one on there now.......

100% yes Keith... use the correct maf

[UrS4boy]

I hardly think that an experiment using a much denser liquid, a completely different mesh with effectively a reservior of water from the restriction of the collinder and gravity tells me anything about the flow of a gas through the mesh in question, neither do I agree that the open mesh is effective in the purpose of inucing lamina flow. I'm sure that if you pour the liquid onto a representitve mesh then you would not see the collinder effect... the mesh is there for protection and not much elso IMO.

Sorry, my bad. I guess I was confused by teaching fluid mechanics for 11 years at a University.

Duh.

Oh, yeah, the world is ROUND.

But then again, you might not believe that one either.

[Error404]

i've just been playing with a seive and a collinder in the sink and i agree with Andy

[avants2turbo]

so are you lot convinced i need a new MAF... its much quicker with the one on there now.......

[Rusty]

I hardly think that an experiment using a much denser liquid, a completely different mesh with effectively a reservior of water from the restriction of the collinder and gravity tells me anything about the flow of a gas through the mesh in question, neither do I agree that the open mesh is effective in the purpose of inucing lamina flow. I'm sure that if you pour the liquid onto a representitve mesh then you would not see the collinder effect... the mesh is there for protection and not much elso IMO.

[quattro20v]

There is also a plastic kind of net in the airfilter box to prevent turbulens, i'm told that you should even keep that if you put a conefilter.

[UrS4boy]

In what way will a mesh stop turbulent flow over the wire?

Try this experiment: Run some tap water through a kitchen collander or a strainer. Observe the water coming out the bottom.

Then think air flow throught the MAF.

[Rusty]

Let me guess, you had previously removed the screens because they "just weren't needed".

Reasons why the factory installed the metal screens

In what way will a mesh stop turbulent flow over the wire? If it was a series of tubes or a long grid like the RS2 MAF then we're getting somewhere but a mesh... er, no. The tube around the wire does that job.

I've removed both meshes on mine as they're a small restriction but it all adds up. All runs tickedy-boo

[Rusty]

I've removed the screens but then I've got a spare MAF from Slovenia and they're the best ones