Sorry this is not really answering your question but it's more like "adding" to your question. Why do Japanese car manufacturers when releasing one of there sports cars to Europe or the U.S. do they "tone-down" the hp and torque and such? I don't understand why they don't release it Japanese Spec. Could someone please explain this?
I would think it would not take much to get back up to JDM power. Possibly just some higher-octane gas, and some more boost via your favorite boost controller. I am not sure, but if they made the ECU smart, higher octane gas just may be the only trick you will need.
IIRC, the engine needs to be detuned some because the UK and the US do not have high enough octane for the engine to make 280 HP. Which is only the number they put on the car because of the "limit" established by the JDM car manufacturers for cars they sell in the JDM. Most things I have read about the JDM STi figure the car is closer to 310 HP.
Hmmm, I see. That's kind of weird.
Also, everytime I read RON in your reply I laughed because I kept thinking of Ron Popeil, the guy who does the 'Set-it-and-Forget' it infomercial. He makes me laugh.
Oh god I watch too much TV.