Stock ECU: brand /model?
 

I'm trying to find out what ECU is fitted to the Scion/BRZ/GT86.

Maybe I missed the thread, is it known?

It's made by DENSO. Don't know the model. I'll try to check after while.

Thanks, I'm talking with a specialist here in Italy who works on Denso, Mitsubishi etc
If I know the specific model he'll be able to tell me if he can work on them.

same as the one in the euro diesel impreza/wrx , I'm told

Ecutek on the case in the UK.

Can't see much to be had ( 10% ??)with out turbo/super bolt on

Yeah, 10% and the ability to take advantage of other mods.

Why does everyone crap all over NA mods. Yes turbo will make more power. Anyone on this forum is well aware of that. NA can be and is still, fast. It takes a lot more work and a much broader range of skills and knowledge to make a NA car fast, but that's where the joy and satisfaction comes from.

Op, please keep us updated!

Any pictures of ECU and plugs will be very welcome

DENSO are normally good to work with so far as reflashing goes

the ECU is the same style as many other late model toyota and subaru's.
plugs:
http://www.purcellperformance.com/Tech/FT86/A33.jpg
http://www.purcellperformance.com/Tech/FT86/A34.jpg
http://www.purcellperformance.com/Tech/FT86/A35.jpg
http://www.purcellperformance.com/Tech/FT86/A36.jpg

And the Toyota Techinfo doc on the SFI system:
http://www.purcellperformance.com/Te...13%20FR-S).pdf

Now that is a useful first post!

Interesting. D4-S fueling at high rpm/load has changed since the 2GRFSE. Used to be DI only. Now it's a mix in the upper rpm range and it almost implies that the port injectors are needed because the DIs are maxed out.

@arghx7 your thoughts on this subject are always appreciated.

I noticed that too. When I finally take mine home, I'm gonna plug in my OBD2 box and see if I can get a feed of the injector duty cycle. I want to see just how much capacity they left on the table.

Oh hey, that's right, the direct injectors look maxed out...perhaps this is why HomemadeWRX is looking into replacing the fueling system :O

Although, those 11:1 AFRs are a bit troubling, perhaps the direct injectors are sufficient for a slightly more sane equivalence ratio on higher octane fuel (E85 seems like it would be amazing in this engine)?

EDIT: oh hey, look, possible rudimentary cam specs? 255 degrees duration...hmmm. Toyota says the Prius is more like 265, and I somehow remember seeing a similar chart for a different (it was a "medium speed" engine, from some sort of sedan, maybe the 2GR) engine and it was around 255 as well, but with a much lower torque peak. Perhaps this means a longer duration cam can net some top end gains :O

I think he said his contact is with Bosch though, so he may not make any significant progress from that. The spray patterns are quite different if I recall.

Oddly enough, I now have 1 degree of separation from one of the top Denso executives in North America. But it's complicated by the situation of him being married to my ex-gf.

I've been watching the fueling with my scan tool. Its mixed pretty much everywhere. Its going to make tuning interesting to say the least.

Don't be so certain about the useage of the port injectors at high load however - they may very well be using the small amount of fuel to help cool the intake valves and intake air charge a bit.

May also be necessary to help keep the vales clean, as that is one of the primary stated reasons for using the blended fueling in the first place and not just going straight up direct injection.

Very interesting info, thanks, but still no ECU "name".