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still going ...
if you want to go the ipd/gt3 route and increase your maf housing diameter, the cayman/987 is a match. further, the cayman/987 airbox is a HUGE improvement over the one that came with your 986. so, put in a 987 airbox and maf housing (the 986 and cayman/987 use the same maf) and you are now 83mm throughout. as already posted, this will f-up your cars tune, as the ecu uses the area of the maf housing to calculate airflow. this means:
1) hope the computer can adapt (if you search on this forum there is at least one person who has done such on track cars and had no issues);
2) expensive custom tune (Pedro is probably your best and least expensive option here); or
3) try to use an ecu map for a 996 3.4 e-throttle pre-variocam+. this map is designed for the larger maf housing diameter and *should* work on your car. cost would be the amount of time it takes your mechanic to push it with a piwis or pst2 (3 minutes). I eventually want to test this out but would love someone else to prove the concept ...
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