Air filter question
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Newbie
Joined: Aug 2002
Posts: 83
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From: Australia
Air filter question
Does anyone have any information about the true agins from air intakes? I guess I'm more interested from a tuner's perspective.....
In Australia, MRT is a local tuning company based in Sydney and they do alot of work on WRXs here (and are quite reputable). According to their R&D into the EVO 9 with an ECUTEK, they seem to think that quite a few aftermarket air filters dont give that much gains - they say that the perceived gain in power is really a leaning out of the air/fuel ratio and once you've corrected it with the ECU the gains almost all dissapear.... they've also had experience with aftermarket filters generating internal vortexes etc so that the stock air sensor doesnt give accurate readings further limiting the ECU's ability to produce gains....
The only thing is that they dont mention what brands of air filter they tried....
The article is here:
http://www.mrtrally.com.au/performan...-Rev-Mar06.pdf
Any comments?
In Australia, MRT is a local tuning company based in Sydney and they do alot of work on WRXs here (and are quite reputable). According to their R&D into the EVO 9 with an ECUTEK, they seem to think that quite a few aftermarket air filters dont give that much gains - they say that the perceived gain in power is really a leaning out of the air/fuel ratio and once you've corrected it with the ECU the gains almost all dissapear.... they've also had experience with aftermarket filters generating internal vortexes etc so that the stock air sensor doesnt give accurate readings further limiting the ECU's ability to produce gains....
The only thing is that they dont mention what brands of air filter they tried....
The article is here:
http://www.mrtrally.com.au/performan...-Rev-Mar06.pdf
Any comments?