FA20DIT vs FA20 D4-s?

[OrbitalEllipses]

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.

Originally Posted by WiebTech Performance

I'm very curious what Subaru is going to do to combat the carbon build up on the back of the valves that comes from only having direct injectors. BMW and GM are already having lots of issues with this.

Air/oil separator.

[Calum]

Originally Posted by WiebTech Performance

As an aftermarket solution maybe, but a catch can would never come stock.

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.

[xjohnx]

Originally Posted by Calum

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

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

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

[The Racers Line]

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.

[PrimeMotoring]

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.

[WHITE]

Originally Posted by PrimeMotoring

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:

Originally Posted by Calum

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.

...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.

[D K]

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

[Calum]

http://www.ft86club.com/forums/showthread.php?t=47004

[xwd]

Originally Posted by hmong337

Another reason why I think it wasn't Subaru ditching the d4s but rather Toyota wanting to keep that technology firmly in their grasp. Toyota's a business and one of the most successful in history. I can't see them handing over all their d4s tech that they took years to develop to a partner/competitor that never had any DI tech prior who can potentially use it for their own interests.

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.

[WHITE]

Originally Posted by dwx

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?

[OrbitalEllipses]

Originally Posted by WiebTech Performance

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.

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

[Calum]

Originally Posted by dwx

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.

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

Sent from my GT-S7560M using Tapatalk

[WHITE]

Originally Posted by Calum

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

Sent from my GT-S7560M using Tapatalk

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

[Jameson86]

Originally Posted by The Racers Line

As an aftermarket solution maybe, but a catch can would never come stock.

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