Quote:
Originally Posted by bigrobwoot
Well if it does that, I would think it would be stock diameter, so the only improvement in flow over stock would come from the filter, so you could just drop in an aftermarket filter in your stock intake. Right?
|
Diameter alone does not determine the MAF's calibration. Sometime you can need calibration even if the shape of the tube is changed because the MAF sensor "sees" turbulence in the airflow as different flow amounts. The stock maps have been calibrated to the stock intake, so the turbulence in the stock intake is compensated for.
Along the same lines, it might be possible for a high-flow panel filter to create the same issues, but in practice on the Subaru I haven't heard of anyone having issues the way people have issues w/ aftermarket intakes.