986 aero & cooling mods

[j.fro]

While we're doing semi-naked tail shots:

You can see the lip that I had to bend up to create airflow. I do put the rear aluminum bumper back on, just in case. I have no quantitative data, but I believe that my spoiler configuration creates a low pressure area that helps pull air/heat through the vents in the bumper cover. The back end of the car certainly gets dirty quickly!

[woodsman]

Originally Posted by j.fro

I have no quantitative data, but I believe that my spoiler configuration creates a low pressure area that helps pull air/heat through the vents in the bumper cover. The back end of the car certainly gets dirty quickly!

I think you have created a parachute with a slow vent at top and a huge back draft- none of which you want. It won't take effect until around 60 mph though. Be careful cornering at the limit above that.