[M_a_t_t]

I did some pressure testing for the separation edges I've had on for awhile. My pitot tube mount wasn't the best and would rotate a little bit so I think I need to modify it and re-test before drawing any conclusions. Possibly use a different road too. Speed limit was 45, I did 50 MPH.

My mount:


I used a holesaw to drill a hole in the broken bumper cover. I thought there was going to be a foam core, but it was actually hollow. Initially the pole was a tight fit, but after driving for a few miles it loosened up. I used some duct tape to hold it in place, which worked fairly well.


On the end of the pole is this. A coiled up coat hanger plus the pitot tube held on with some heat shrink. It was a tight fit over the pole and then I used some electrical tape to secure it even better.




I tested in the 4 spots shown here (tail lights and bumper). Units were converted from inches of water.
Modified light: -27.4 Pa (-24.9 Pa & -29.9)
Stock light: -29.85 Pa (-39.8 Pa & -19.9 Pa)
Modified bumper: -31.1 Pa (-34.8 Pa & -27.37 Pa)
Stock bumper: -34.85 (-47.3 Pa & -22.39 Pa)

I could see the mount rotate (not much, maybe 10* or so) as I drove so I know that was messing with the readings. Not an oscillation, just a change in direction. Probably because of the reverse in direction and therefor crosswind side.

So initially we have 8% lower on the lights and 11% on the bumper. I think I can say the separation edges works, but need to work on the mount to say how much with any confidence.