modded/ smoothed MAF?

[olethalb]

i've heard of a few people smoothing the grills out of the MAF tube, i tried a search but couldn't find anything.

what is the purpose of the grills/mesh?

is there any advantage or disadvantage in removing them?

i am also thinking of making for want of a better term 'induction pipe' from alloy with a built in housing for the MAF probe. but obviously need to know if there are any benefit/reason for the mesh on the standard unit?

thanks, olly.

 

[DPJ]

The mesh in the MAF housing straightens the airflow past the element. (Provides laminar flow)

 

[olethalb]

so it's needed? i know older models had steel mesh which wouldn't straighten flow much.

what would happen if it wasn't there, potential inaccurate readings? excuse my ignorance.

 

[DPJ]

so it's needed? i know older models had steel mesh which wouldn't straighten flow much.

what would happen if it wasn't there, potential inaccurate readings? excuse my ignorance.

There are other schools of thought, but I reckon it's needed to provide accurate readings.

 

[olethalb]

is there any ways of testing? i really fancied a nice alloy intake/ filter pipe with built in housing for MAF probe.

 

[DPJ]

is there any ways of testing?

Logging airflow with vag-com.

 

[olethalb]

need to get myself a laptop then, i'm sure my mate must be getting tired of me on his doorstep - 'can you plug her in mate?' haha.

guess i'll mock up a pipe and run some logs - not that i know what i'm looking for....

thanks for the input fella.

 

[Reuvers]

question, why do you want to remove the mesh so badly? what makes you think its better?

 

[olethalb]

because i want to fabricate an alloy induction/ intake pipe to run from the TIP to the filter without the joins for the MAF and have the MAF probe mounted in the alloy pipework so the mesh wouldn't be possible in a 1 piece alloy intake.

 

[Reuvers]

then only thing I can think of is have the maf written off in a map

 

[olethalb]

i can weld a boss into the alloy pipe to mount the probe part (without the tube and mesh) no problem, but if the mesh is functional it may cause a problem?

 

[cuprabaz]

I've removed the wire mesh and flow straightener years ago, i've had no issues.

 

[coxyboy]

Hi mate i had a 200bhp punto gt before and i removed the mesh and had no probs!!

 

[m0rk]

and have either of you back to back measured the airflow? or measured the fuelling to see if it's running right?

 

[Premier-Tuning]

cool, just need a new sump now! DOH!! fitted my 'H valve' took it for a test round the block last night and managed to hit half a brick and smash the sump. luckily i noticed straight away!

still don't know if i cured the boosting issue and seat (local) say it'll take 8 weeks to get me one! hooray for backdraft!!

oh it's olethalb on my mates account btw,

 

[cuprabaz]

I did when at the time and i gained a few g/s, 6 seems to ring a bell. Might be posted on here about 3/4 years ago.

Fueling's been fine when it's been on the RR and hooked up to a wideband sensor.

 

[m0rk]

dig em out.... I trust Bosch more than people with dremels.

They wouldn't have designed cost into the application if it wasn't required

 

[coxyboy]

and have either of you back to back measured the airflow? or measured the fuelling to see if it's running right?

i had mine tested on a rolling road when was set up and it was all good!

 

[m0rk]

what does putting it on a dyno prove?

 

[cuprabaz]

I did all my logs back then on my works laptop which is long gone. I'll have a look on my own laptop to see if i copied them but i can assure you my g/s increased after removing the straightner and mesh. Runs were done directly before and after and i used snips not a dremel Common sense will tell you that you'll see an increase in flow because the straightener will restricting the flow, maybe not a great deal but it'll still slow it up.

I think coxy was meaning he had his tested the same way mine was done.