Bmthorn

Who's got some information on how to properly mod this MAF? I've searched a lot but found many inconsistencies between posts and nothing specific to the 'A' part that I can remember.

Do I take the sampling tube all the way out or leave it partially in?

Also do I need to use an o-ring?

Thanks.

4AudiQ

Sampling tube comes all the way out.
Screen comes out.
You need an o-ring, what size I do not know.
Here are various pics of Mance's work on my SXTB:
<img src="http://pictureposter.audiworld.com/81050/img_0028_sxtb.jpg">


<img src="http://pictureposter.audiworld.com/81050/img_0032_sxtb.jpg">


<img src="http://pictureposter.audiworld.com/81050/img_0038_sxtb.jpg">


<img src="http://pictureposter.audiworld.com/81050/img_0036_sxtb.jpg">


<img src="http://pictureposter.audiworld.com/81050/img_0040_sxtb.jpg">


<img src="http://pictureposter.audiworld.com/81050/img_0041.1_sxtb.jpg">

Bmthorn

Anyone know what size o-ring to use?

moribundman

I remember Mance used O-rings with 11 mm O.D, which made for a snug fit in the MAF sensor inlet opening.

Get a bunch of metric O-rings with different cross section thickness, for example 7 mm x 2 mm (O.D.=11 mm) and try out what works best. Don't forget to clear any lean or rich codes between experiments (And never ever go way too lean!).

Installing another O-ring in the post MAF sensor wire opening may let you calibrate your MAF sensor further.

Bmthorn

Thanks, I'll start to look for one.

moribundman

All with 11 mm outside diameter, but various inside diameters. I'm not sure if you can find metric O-rings at The Home Despot, but they do have some small O-rings.

Brdman*

the Mance ones flow much better than just a sans-sampling tube/no screen MAF.

EDIGREG

Make sure you leave the "step" intact.

Bmthorn

Yep, I left it there.

moribundman

I don't need an O-ring. My engine is still running like a fat pig.