Markmarcus

it came with a catless downpipe, aftermarket intercooler, cold air intake and Grimspeed boost controller. I have these on my car. No problem. purchase the cobb tuner...........i know iknow 600 plus 600 for the tune. but ya by pass the AVCS... thats a major cost and a major save. SO! one step back TWO steps forward.

Are you suggesting I should use the 20x injectors instead? NO I took the entire JDM engine and modified the AVCS and harness wiring. base map tune then to my tune guy. while modifying the20x i wanted to swap fuel injectors from the Oem ej255 engine because they were "NEWER"... that's when i discovered that 20x were Larger then the ej255 and duly noted it when i got it tuned. Your swap sounds better then mine and i never thought of doing it that way. that because i am a weekend warrior with limited knowledge. i would assume your swap is feasible but im not the guy to answer that. i do know that these engines ej255 and 20x are similar BUT different in size in some aspects. WILL EVERYTHING FIT that's the question???? im sure you will see as u go along.

What Sprank just said and what I said. My set up was my preference. neglected to mention; ....(cause i did this three years ago) yes Sprank........ 'Base map' from cobb got me to the tuner. Please do not forget the FUEL injectors they are LARGER but for the life of me i cant remember how large.

Rumbly! you can try your method if you like; I have no experience with this method because it was too involved and costly. the quad AVCS are a pain in the a**. cap them, straight pipe the exhaust, tune it and move forward. IF you NEED to be more "involved" and have the time/$$$$ then follow your heart and go for it. Did you also swap an ej20x on your car? yes but that would of course require the jdm ECU. NO capping the exhaust camshaft oil ports . YES disconnect the wiring as well. i received no codes because it just never recognized it. then retarding the timing 1 tooth (7 degrees). I have no experience with this. When i started the engine i was horriffic until i brought it to the Cobb Tuner guy. OH and Sprank! easy tiger it was a miss key on the name; no worries.

Not sure exactly what spank is trying to say however I have an 07 Legacy GT limited turbo (not my daily drive: project car) we eliminated the front ACVS no xtra equipment needed (aka harnass). Tuned it With Cobb passport and it runs great. NOTE! you MUST compensate for the larger fuel injectors that come standard with the JDM. A "GOOD" Cobb tuner should be able to do this. My car passes inspection every year and I live in New York.