S2000_916

https://www.ebay.com/itm/Honda-S2000...-/222382768954

will these work? add aero?

Mrsideways

I have a set of these, I didn't transfer them to the new rear bumper but had them on for an event a year ago. They clean up the back a ton. Can't say weither they help aero or not. They were kinda grey area for TT4 so I left em off the car when I put the new bumper on.

robrob

I ran a few sessions without the rear bumper cover and it seemed to make no difference at all in lap times. I'm thinking the flow back there is so turbulent it just doesn't make much of a difference in drag.

djsilverjohnson

I've read a couple of tests of pickup truck aerodynamics, with tailgate up vs. down. It has less drag with the tailgate up because the bed is filled with high pressure air, allowing the airflow over the truck to approximate a car. I suspect the same thing may apply to the rear bumper covers. RobRob is a good driver and if he couldn't go any faster with it off, that's proof enough for me.

S2000_916

i would like to do a roll run , me with no bumper vs my brother stock. that would end all questions.

thomsbrain

Miata cut bumper vs. diffuser CFD analysis. Assuming an otherwise flat floor, cutting the bumper increases downforce and reduces drag compared to a standard car. The diffuser is far superior at creating downforce, however.

robrob

NHRA 330+ mph Funny Cars have flaps on the rear bumpers to prevent pressure buildup but at the finish line the flaps are closed as seen in this pic. I really think this is a non-issue.

thomsbrain

But you'll notice that the lowest point on the rear "bumper" of that car is well above the mid-line of the enormous rear tire, and is actually approaching the top line of the rear tire. That's significantly more aggressive than even taking the bumper off of a street car. If anything the above picture is proof of concept.