[Ben006]

I don't think you'll feel a difference with reflective tape on the boxster, but for the price... you might try!

I put some on the first version of the plenum.

I feel that the 986 is really sensitive to outside air temp, I can feel a difference between morning power and noon power, even though it's only 10/15°F difference.
I think it has more to do with the ECU settings that advance timing when it gets hot than the actual difference in air density...
I got a new phone so I'll be able to do datalogging easily now. I'll try to collect the right info, see what's really going on!