I believe we'll have issues with the turbo where it's mounted and the IC...after having to re-do those, your choice of FI kit may be cheaper. We'll see once the 2015 WRX hits the ground and n00bs start wrecking them.

Air/oil separator.

While an air/oil separator isn't common they do exist in factory cars. Hell, the 95 neon came with one.

As for the fa20dit, this has been discussed ad nauseum. IIRC, the rods and crank are the same. The pistons are hypereutectic, not forged, and don't have the proper crown shape for our spray pattern. The block has the starter on the wrong side and the turbo manifold won't fit as it will interfer with the body on our cars.

What I haven't seen covered yet is the differences in head flow, the valve train, and how the newer combustion chamber will do with knock resistance.

Exactly. Anyone who thinks Subaru hasn't considered this may not be paying enough attention.

Source: http://appft1.uspto.gov/netacgi/nph-...DN/20120080015

Awesome stuff. I wasn't doubting they would find a solution, just curious what it would be. Kinda cool to have a group of internet Sherlock Holmes's at your disposal.

I would like to get a close up look of the size of the DI injectors on the wrx engine. it would be nice if they fit the fa20 for FI applications as they most likely are larger. Audi/VW 2.0t FSI guys upgrade their stock injectors to S3 or RS4 direct injectors when going larger turbo. Maybe coupled with the WRX HPFP as well we can see some interesting results when tuned properly with the already available port injectors.

Well if this is true:
...Then likely the direct injectors from the wrx would not work with our piston bowls becuase of the difference in spray pattern. But who really knows untill someone gets their hands on one to play with.

Does anyone know the rod length and compression height of the new engine?

Subaru started developing DI tech a long time ago, but it was never meant to be used in a NA application. They first used DI in a turbo diesel engine in 2011. The FA20DIT was being developed before the 86 FA20. It was used in the JDM Legacy in like May 2012.

Correct me if im wrong but wasnt the ee20 turbo diesel unveiled in like 2007-2008?

NASIOC does most of my sleuthing for me. That patent for the AOS design has been known for ~2 years or so.

Has there ever been a diesel engine that didn't use direct injection?

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Actually, let me introduce you to the IDI. Indirect injection diesel. Found most comonly in the old ford 7.3l non powerstroke.

It seems like it has come standard on the fa20dit...