Originally Posted by Sayjac
Originally Posted by metroplex
…. I've heard rumors they are made by Champion in the past for FL-820-S.....
In the past Champ Labs did have the FF contract. The FF contract and off the shelf Motorcraft, different contracts obviously.
I was thinking too quickly. I meant the Ford Factory filters were made by Champion.
Originally Posted by itguy08
Originally Posted by metroplex
The same goes for their air filters. If you have a 2011-up Explorer or Taurus, that stock air filter from the factory has an orange polyurethane seal with paper element, but does not have the reinforcing wire. I searched high and low and could not find a similar replacement air filter. Every aftermarket replacement had the wire mesh, sometimes so thick (like Motorcraft) that there'd be noticeable reduction in air mass flow when datalogging my SHO.
Where are you reading the Air Mass? The Ecoboost 3.5 Gen1 is a Speed density system and doesn't have a MAF, just a boost pressure sensor but that should be fairly constant as the turbo can always spool more to build more pressure.
All the EcoBoost engines are speed density, but there are PIDs that infer the air mass flowed. I don't use that for tuning, but only for comparison. The factory engine tune has tables that show air flow limits as well, so the ECU does utilize the inferred air mass at some point.