i was planning on getting an evo fmic (they're cheap)
but i was talking to a guy who works for injen at an xs engineering dyno day/tech event about the merits of that particular ic, and i walked away with this:
1. it's kind of efficient when it's cold, but once it gets hot, it heatsoaks like a mo'fcuker.
2. it holds boost quite well.
3. if you're looking for max power, an infinitely more efficient aftermarket fmic will be best.
anyway, good luck on your setup
