To reiterate, this statement says it all:
Originally Posted by willwren
While your idea at first sounds like a good one, it'* simply not practical to put your filter so far from the cold source.
Not only that, but you want a 'long-ram' intake tube to develop velocity and laminar flow. This isn't as important on the supercharged engines, but it is on your L27.
While we could go into great detail and argue about your previous positive results, etc., the bottom line is that you will need to shield that intake air from ALL engine bay heat if you want to reach your stated goal of getting all possible power from that L27.
Additionally, the mention of velocity and laminar flow above is the result of much research and testing done by folks on this site and not just a casual thought.
You actually mention above that your results get worse after the engine gets to temp. That right there, tells you all you need to know, IMO.
Keep us posted as to what you end up doing and your results.
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s