Stock ECU MAF replacement project

[stocious]

What's the update on these

[stocious]

Oh and they will be plug and play, Marc printed some 6 pin MAF connectors on a 3D printer!

Excellent news! Glad I found this thread

[prj]

Oh and they will be plug and play, Marc printed some 6 pin MAF connectors on a 3D printer!

[stocious]

Soon... I did not have much time for it, but I am getting some help with it.
If all goes well, then they will be available in a few months.

Ok ,good work !!

[prj]

Soon... I did not have much time for it, but I am getting some help with it.
If all goes well, then they will be available in a few months.

[stocious]

Are these available to buy ?

[Thecrispynoodle]

Will move this to another thread, I understand why you want this one focused on the new MAF R&D.

[prj]

MAF related question. Clearly the non RS2 screens restrict flow at higher RPMs, but do they also counteract turbulence across the MAF element (and thus 'smooth' the output signal) or create turbulence by way of being an obstruction? Basically are the screens there only to prevent damage to the element and the engine from foreign bodies which have somehow cleared the air filter or do they serve some other airflow smoothing purpose?

Common myth, the screen does not make any significant difference.
I have debunked that autospeed article time and time again.

The pressure drop they measure is 29.6 INCHES OF WATER at 7000 rpm with screens attached and 24.8 with them removed.
That's a difference of 4.8 inches of water or in other words 0.012 bar.

Yes, that's 0.01 bar difference between the screens on and off. Their change in power figures is just because the MAF read completely wrong and probably the ECU over advanced the timing.

So please, no more talk about these screens and this 0.01 uber difference in this thread.
There is no practical difference whatsoever between these MAF's. Hell, there is less than 0.1 bar pressure drop (0.07 bar) through the entire intake of these cars at 7000 RPM.
I'd say Audi has done a very good job designing the intake system.

[Thecrispynoodle]

Ha - put my phone down for a while before replying. You got there first :-)

[Thecrispynoodle]

This report claims the screens do restrict flow. It's a good read. This is linked to inlet hose collapse on turbo upgrades also.http://autospeed.com/cms/title_Elimi...9/article.html

[EspenW]

They don't restrict flow, the sensor tops
Out at about 350 hp.

Umm.. they do, actually. Check out the classic and most excellent negative boost series that Julian Edgar over at Autospeed did back in the day:

http://autospeed.com/cms/article.html?&A=0652

Check the entire series of negative boost articles. Very interesting info about the almost non existent pressure drop over the filter, etc.

[driftin jo]

MAF related question. Clearly the non RS2 screens restrict flow at higher RPMs, but do they also counteract turbulence across the MAF element (and thus 'smooth' the output signal) or create turbulence by way of being an obstruction? Basically are the screens there only to prevent damage to the element and the engine from foreign bodies which have somehow cleared the air filter or do they serve some other airflow smoothing purpose?

They don't restrict flow, the sensor tops
Out at about 350 hp.

[Thecrispynoodle]

MAF related question. Clearly the non RS2 screens restrict flow at higher RPMs, but do they also counteract turbulence across the MAF element (and thus 'smooth' the output signal) or create turbulence by way of being an obstruction? Basically are the screens there only to prevent damage to the element and the engine from foreign bodies which have somehow cleared the air filter or do they serve some other airflow smoothing purpose?

[prj]

Great! When can i order it? :-)

First it is going to the USA for calibration.
We are also going to try to prototype some 6-pin MAF plugs to make this plug and play, but no promises yet

When you can buy... expect early Q4 release I'd say.

[Thecrispynoodle]

Just want to add how interesting reading this entire post has been (took me half an hour) and how grateful we should be to Prj and those working with him for doing such extensive R&D without intentions to make excessive profits from it. I'm interested in this kit over the next few months as have some erratic idling going on and a mixture adaptation code that won't go away so MAF is a possible culprit. Keep up the good work, we need you :-)