[Wonderbar]

Originally Posted by ATL BRZ

I believe so. @Wonderbar may want to clarify. The lowest setting brings the flat leading edge nearly to the point where it's "digging in" to the air under the car, which creates the most downforce on the top side, hence my car squatting at 125mph. Stiffer rear suspension and/or a functional front splitter would fix that but pushing the mounting tabs up, bringing the leading edge up and the entire diffuser to a less aggressive angle fixed the excessive squatting at max speed. It's likely creating a bit less downforce at high speed when it's adjusted all the way up.

I'm likely going to wait and see what Driveway Labs end up with for a front splitter to balance out the aero front and rear. I did not have any issues with handling at all. The diffuser did not bring ANY ill effects at any setting. I asked someone in my run group who was following me a couple times down the back straight and they did not see any movement from the diffuser.

You were getting squat at 125??!!?

You are spot on for diffuser theory, the steeper the angle, the more downforce generated, the flatter the angle, less downforce but also less drag.