Air Filter Housing Restriction

[Jaxonalden]

Blue2000S,

Thanks so much for doing the leg work for the members of the Forum. I didn't realize there was so much to getting the real numbers. Like I said, I thought you could just put a flow meter on and read the delta. This is obviously the correct way to do it. If I understand your last statement, the difference is 5-6% or about 24 CFM increase over the 400 CFM @ 7200 rpm.

Power increase if any? My guess is the engine would enjoy the better breathing. Again, thanks to Blue2000S for the great work. Beers on me if we ever meet.

[wvicary]

So those fellows at Porsche and Bosch must be idiots if they put a restrictive screen in the works. I just don't get it.

[blue2000s]

The pressure drop is negligable. If I tested the drop due to the MAF itself, it would be considerably more. Even an elbow in the intake will be significantly higher drop. This type of screen is usedin every MAF based car I've looked at so Porsche's not doing anything different than anyone else and they're not significantly effecting airflow with it.

[Jaxonalden]

Originally Posted by wvicary

So those fellows at Porsche and Bosch must be idiots if they put a restrictive screen in the works. I just don't get it.

Just because I question the restriction and need of the screen doesn't mean I'm smarter than the OEM. I'd just like to know why its there and is it needed? If everything the OEM does is correct, we should never have to touch our cars, right?

None of us do anything to our cars because they're perfect. Just gas and go. F-that, I'm going to tweak with the engine freeing up, what I think, the Government suppresses in the name of the EPA. Free flow exhaust, mapping, air cleaner, brake upgrade...oh wait, those Porsche fellows must be idiots.