[Xnander Bishop]

I have a Bosch PCM/ECM EJ25 and I want to get it reflashed/remapped. To what I have been advised is that it can't be done directly done to the computer so I will have to get a piggyback to manage the fuel system. Is there anyone that can assist or get out advise about going about it?

 

[cardoc]

Unichip Automotive Performance - Homepage

http://www.cardomain.com/ride/2293141/1999-subaru-impreza/

PerfectPower 'PiggyBack ECU - Subaru Impreza GC8 & RS Forum & Community: RS25.com

99 forester with turbo - Piggyback ? power? - Subaru Impreza GC8 & RS Forum & Community: RS25.com

That ought to keep you busy for a while.

 

[Xnander Bishop]

Option "A" or Option "B"?

After looking through the mentioned forums, and looked around for a bit, that I think I will shoot for a Perfect Power chip. However, the choice is this, a piggyback or a standalone. Which one would be the better choice?

 

[cardoc]

You only need fuel and ignition control, so the piggy back should suffice. A stand alone would work with yours and require a bit more programming. Either way having the standard transmission is a plus. Less parameters to screw up.

 

[Xnander Bishop]

After looking around on other forums and reading about the ECM (I'm going to call it that until I do something with it, afterwards I will call it a "PCM") and I find out that there's a open and closed "mode" I guess to call it. It's closed until you get 4k rpms at 100% throttle. I read a bit about it but then it just turned into people doing the run around and got me all mixed up so if someone knows a good bit about it for sure I would like to know, and how well those settings would coop with a piggyback. I know a stand alone would be a good choice due to it's a whole new computer and I'm guessing it would be just a set up and go (give or take some tuning of course).

 

[Xnander Bishop]

bump

 

[Xnander Bishop]

Not Piggybacking but it maybe an answer to the ECU tuning.

I looked around and about out there's a possible way to tune the ECU in my car and for anyone else that has a Denso ECU. I have not done too much digging just yet but i am stating here that there's a chance.

Piasini serial suite 4.3. I found it in another forum and someone mentioned that this does most japanese cars. If anyone else has info on it or find more info, please let me know here.

I am determined to find a way to get some HP out of my car with out doing a lot of work and for less money.