[freesaints]

Jack, thanks for the write up. Love the thoughtfulness and approach to your modifications. I do agree with the straight line performance that a diffuser can help with, but I guess I thought that there would be linear improvements in turns as well. That being based on no scientific knowledge, just an assumption.

So, would someone need to design a diffuser more for handling around turns or more for straight line (with a different shape, angles, etc) but not both, or is there a "universal" diffuser design that would improve performance across the board?

Also, beyond the shape of the diffuser, what sort of considerations would there be in trying to make it fit with the existing car components (I have an '87 930 with Andial intercooler, modified turbo, B&B headers/muffler)? As in, would it work in addition to the rear bumper/lower valence, or would it replace such? We're getting into an area (aerodynamics) I know very little about and how one change affects something else.