Stupid Air Filter Question
10-04-2009, 09:57 PM
#31
Burning Brakes
If it makes you feel better to run your air filter upside down and to choke-off air to the mass-air sensor, and to run the air filter in an orientation contrary to the German-language printing that appears on an actual Porsche filter then by all means do so.
You are however, still, quite wrong.
You are however, still, quite wrong.
This picture threw me off to make that mistake. For some reason, my filter fits better with the curved side facing down. Just went to the garage flipping the filter back with the curved side facing up.
Steve
10-04-2009, 10:00 PM
#32
Burning Brakes
Pay no attention to the arrows stamped on the sides of the 928 filter they are for packaging when the filter is made..
( I have seen arrows that point in both directions on different filters)
So a little bit of common sense is required here......
On a 928, The filter has 2 sides , with the filter sitting on a flat surface the raised part is the the side thats facing the incoming air, the flat part faces the MAF/ throttle body.
Note, This Only applies to the 928 air filter housing.
Steve if the filter that you have fitted ( in any of your other cars) can be installed so that a raised portion of it faces away from the throttle housing then you should install it this way, it will increase the air box volume.
Once a filter has been installed it is not a wise idea to try to clean it so it can be turned around. as fine particles will be sucked into the engine.
Replace the filter and install it the correct way.
That said there are some filters that will only fit one way and are in fact made to fit one way as in the bigger or raised side faces the throttle, in that case install the filter the way it fits best into the air cleaner housing
BUT for a 928 the filter should be sticking up when you fit the top cover of the air cleaner housing
( I have seen arrows that point in both directions on different filters)
So a little bit of common sense is required here......
On a 928, The filter has 2 sides , with the filter sitting on a flat surface the raised part is the the side thats facing the incoming air, the flat part faces the MAF/ throttle body.
Note, This Only applies to the 928 air filter housing.
Steve if the filter that you have fitted ( in any of your other cars) can be installed so that a raised portion of it faces away from the throttle housing then you should install it this way, it will increase the air box volume.
Once a filter has been installed it is not a wise idea to try to clean it so it can be turned around. as fine particles will be sucked into the engine.
Replace the filter and install it the correct way.
That said there are some filters that will only fit one way and are in fact made to fit one way as in the bigger or raised side faces the throttle, in that case install the filter the way it fits best into the air cleaner housing
BUT for a 928 the filter should be sticking up when you fit the top cover of the air cleaner housing
Steve
10-04-2009, 10:03 PM
#33
Three Wheelin'
10-04-2009, 10:13 PM
#34
Burning Brakes
No, I have a new filter that I just put in with the curved side facing down. But I just went to the garage to put the old but good filter back to the way it came (curved side facing up.) I have not driven the car.
Steve
Steve
10-04-2009, 10:36 PM
#35
Team Owner
Steve just to be clear............ if you have a filter that was positioned incorrectly then you turn it over and install it, the dirty side will now be facing the intake and any loose dirt will be sucked into the engine.
From your lats post it is not really clear what your doing?????
From your lats post it is not really clear what your doing?????
10-05-2009, 12:22 AM
#36
Three Wheelin'
Steve just to be clear............ if you have a filter that was positioned incorrectly then you turn it over and install it, the dirty side will now be facing the intake and any loose dirt will be sucked into the engine.
From your lats post it is not really clear what your doing?????
From your lats post it is not really clear what your doing?????
10-05-2009, 12:32 AM
#37
Burning Brakes
Steve
10-05-2009, 11:19 AM
#38
Team Owner
Steve you are correct about the filter fitting better, but operational wise it should have the ridge facing away from the throttle plate.
10-06-2009, 06:59 PM
#39
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Mr. coffin? Please meet Mr. Nail:
10-06-2009, 07:28 PM
#40
Owns the Streets
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How'd you get an air filter that says 'dot' on it?
And where are those stinkin' arrows that point to upside/airflow/magnetic west.
(mein kar was built in West Germany.)
And where are those stinkin' arrows that point to upside/airflow/magnetic west.
(mein kar was built in West Germany.)
10-06-2009, 08:36 PM
#41
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If you install it backwards it says N380-d0i
10-06-2009, 09:20 PM
#42
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10-07-2009, 01:48 AM
#44
Team Owner
for a quick reference if you look at the molded portion in the center edge of the filter it has the edges at slight angle the narrow portion should face down, the wider area should face up kinda like a funnel.
Nice pictures
Nice pictures
10-07-2009, 11:09 AM
#45
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And for those K&N luvrs, note the pleating density of the N380-d0i paper air filter element.
Lots larger surface area to trap dirt/silt/filth.
Did joke to a few 928'ers at the Joisey Shore Tech Session that there's an easy way to free a few scant HP from the motor using the paper air filter, just take a sharp object and punch a few aerating holes in the filter.
Voila. Instant flow more air.
Lots larger surface area to trap dirt/silt/filth.
Did joke to a few 928'ers at the Joisey Shore Tech Session that there's an easy way to free a few scant HP from the motor using the paper air filter, just take a sharp object and punch a few aerating holes in the filter.
Voila. Instant flow more air.