Does this have a yet to be installed back window? I would think the airflow would rather turbulent without a window, and decrease efficiency of the spoiler requiring it to be much higher to be useful and therefore greater drag. What speeds are talking?
no back window. We cannot run the glass hatch. We will be making a Lexan piece in the future. I was going to fab up some clear sail panels to direct the air better. I'm guessing on the long stretch at NJMSP and Summit point we're at 115-120. If anybody is good w/ math we run a auto w/ 3.75 (non-posi) rear. At the end of the straight before braking we are at about 5800-6k. (in 3rd not OD)
