De-meshing MAF

Welly

Welly

335D Driver :-)
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Morning all.

I've had an interesting convo with Bill about MAF demeshing and the added air flow it can give.

So I thought I'd give it a blast.

Easy to do, I just snapped all the plastic things out, and then ripped the wire mesh out with some rat nosed pliers.

A bit of a tidy up of the rough edges left and off we go. I haven't logged results yet, but will post up figures when I have to see if this is a good mod, or a plop mod.

See, here I am again, trying things out so you don't have to.... :detective2:
 
I wonder if this actually makes an noticeable difference? Well if it is, it's a very easy mod :) Looking forward for any results


// Andy
 
Andy´;987475 said:
I wonder if this actually makes an noticeable difference? Well if it is, it's a very easy mod :) Looking forward for any results


// Andy
Click to expand...

I thought this too and was skeptical. Until I really looked at the layout of the MAF. I estimate that the meshing (both layers) take up about 4-5% of the MAF's total entrance area. That's got to inhibit air flow surely?

I'm interested to see also!
 
Good point dude - but you can just replace the MAF element.... and keep the same tube so I'm not sure what the deal is with that i.e. whether they will take the element only in exchange.
 
Funny enough Bill and I were having the very same conversation the other day too... I have been a sceptic of this in the past but I am changing my MAF and pre-cat lambda in the next week or so and thought I may give it a try.

My understanding is that the mesh is to stabilise the airflow over the sensor but as Welly has said the setup does look restrictive... be interesting to see if it makes any difference on mine

<tuffty/>
 
Rather than shag yours dude, you can try mine out before with your element in if you so wish? Saves knackering a good MAF tube if it won't make a dot.
 
and we all know our MAFs has to be replaced now and then :p But it is worth those extra £137? (In my case). But if you are after all the power you could get this wont matter?
 
audi upgrades
I thought about doing this until some guy on here did it and was like yeah made a difference... Then a few weeks later said his car wasn't running right at all and was looking for a new MAF... needless to say put me right of!
 
fran-s3 said:
I thought about doing this until some guy on here did it and was like yeah made a difference... Then a few weeks later said his car wasn't running right at all and was looking for a new MAF... needless to say put me right of!
Click to expand...

Either coincidence, or unlucky. Knowing my luck, that will be me....

I do plenty of miles, so I will know pretty quick! Don't worry matey, if my MAF packs up, I will be sure to let everyone to avoid doing this....

And then steal the one off of the other S3.
 
fran-s3 said:
I thought about doing this until some guy on here did it and was like yeah made a difference... Then a few weeks later said his car wasn't running right at all and was looking for a new MAF... needless to say put me right of!
Click to expand...

It shouldn't make any difference to the MAF sensor at all... the mesh/grid doesn't filter air and increasing the airflow across the sensor won't make any difference either else I would be in trouble going from 200g/s odd to the 290g/s odd of airflow my BT is giving me...

I suspect the MAF was on its way out anyway... MAF's are ridiculously temperamental... a MAF could be fine for years or last a month.... its Russian roulette as to how long they will actually last... this will be my fourth in owning the car..

<tuffty/>
 
Well, I shall log tonight and see what the score is... I've got a good log from the other day, so will make for a good comparison.
 
dela said:
did this mod a few months ago, no noticeable difference or problems
Click to expand...

I'd say the S3 felt like it went well this morning I must say. But then again, we're only talking about a few g/s air flow really, which isn't going to make all that much odds.

I'd like to see a little more is all, as I'm interested to see what I can wind out of a K04-023 turbo!

Thats why a manual boost controller is going on there....
 
s3dave said:
its curious why they actually fail, as there are no moving parts maybe heat?
Click to expand...

MAF consists of a metal element that is heated up, as air passes over this element it decreases the resistance of the element and allows more current to pass through it to bring it up to the pre determined heat... the amount of current required to maintain the heat is directly proportional to the amount of air flowing over it. Electronics in the MAF sensor converts the current into a voltage that is used by the ECU.

MAF sensors are sensitive to vibrations and can over heat (element will start to get a blue tinge on it).

<tuffty/>
 
L o l.

Awaits the "****, MAF issues thread" ;)

Only joshing lad, do some logging, be interested to see the results.
 
JD09 said:
L o l.

Awaits the "****, MAF issues thread" ;)

Only joshing lad, do some logging, be interested to see the results.
Click to expand...

That won't be the thread title mate, the thread title will be: 'Car mysteriously stolen and found burnt out in the woods'
 
s3dave said:
its curious why they actually fail, as there are no moving parts maybe heat?
Click to expand...

http://badger-5.com/bin/sensoren.pdf

scroll down to hot film air mass meters.. page 54
vibration and shocks kills them dead.
excessive airflow, where they try and achieve their conctant current/temp across the metal film layer also kills the hybrid Ic dead
oil contamination across the film also degrades its ability to determin airflow and under read (generally a degenerative kind of failure)
 
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I did this last year and the cars still fine, pulled alot better and felt more responsive, is worth noting my MAF was kancekered before i did it lol, still is just cant be ***** to change it.
 
Just to add, been on the phone to GSF and they will take your old MAF if youve de-meshed it, you just have to swap the sensor out the tube.

On another note what bit do you need for the MAF screws?
 
I did this to mine a few months ago, didn't make any major difference tbh, still de-meshed and the car has no maf issues, logs of before and after will be interesting though
 
Dani_B19 said:
On another note what bit do you need for the MAF screws?
Click to expand...

A five leg TS25 torx piece like this:

bedc0352.jpg


I bought a set of seven for just over a tenner from my local tools specialist.
 
Ok peoples, the results are in....

It's given me some extra flow.

I saw 210 the other day when it was on the rollers, but I haven't seen more than 207 recently on the road.

With the MAF demeshed, I just got 214.86 G/S.

With which I am well chuffed actually. :) An extra 8.75 BHP for removing a bit of plastic? Shibby.
 
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I did this, and flushed the airbox, and the car felt more responsive, no maf issues for over 2 month.
 
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