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Old 06-30-2021, 12:06 PM   #113
RayRay88
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Originally Posted by redlined600 View Post
Road America went ok, it rained pretty much all of one day. The new splitter gained me back a couple of mphs in the straights so that was somewhat of a success. The car continued to feel great however I'm starting to build enough evidence that the aero for the tracks I run at is pretty much a wash. Road America is very long and the drag penalty is just too much in the straights to over come the rest of the track.
If I decide to stay stock I may remove the aero and go back to the trd style rear spoiler.


Which brings me to the next post......
You could always run a low drag trim, a smaller/shorter splitter with no diffusers and a 0 degree AOA on the wing.
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Old 06-30-2021, 12:37 PM   #114
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I currently run 0-.5 aoa so not much I can back out, the current splitter seems like a good match right now.
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Old 06-30-2021, 12:49 PM   #115
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I know it would suck to redo, but maybe try a smaller airfoil. My setup was pretty draggy and I was able to take a bunch of height out of my wing stays and it helped a ton. I don't think taking any height out of your setup will help since it is not a 3D airfoil design.
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Old 09-17-2021, 10:55 PM   #116
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I found a couple potential issues, one is the alignment was way off, nearly .5" of toe-in in the rear. This was for sure not helping my straight-line speed.


As long as I was changing the alignment, it was a good opportunity to install the racerX toe arms I had laying around.


Additionally I found the trunk lid was flexing/moving quite a bit with the wing(enough to abrade the top of the taillight), this was allowing the wing to change somewhere around .5 to .8 degrees. I have some ideas to fix this pretty easily.
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Old 09-25-2021, 11:36 AM   #117
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In my last post I hinted at the trunk compressing under the downforce of the wing, now I have some confirmation of that.
0MPH


60MPH


80MPH


Next up is a way to stabilize the trunk lid.
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Old 10-05-2021, 10:06 PM   #118
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To stabilize the trunk, I used the holes where the factory bumpers were and added rivnuts so I could use a flat head screw with a locking nut. appears to work as the trunk barely compresses down anymore. True test will be this weekend when I'll be running the long course at BIR.
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Old 10-13-2021, 02:20 PM   #119
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BIR was a mixed bag. Good to see some friends I haven't seen in a while and the trunk supports seemed to work well. Additionally, I was a little unsure about how the car was going to handle after removing all the additional rear toe-in. The good news was the car handled well, slightly more tail happy but more predictable if anything.


The bad, was I went through 2 coil packs (both used oem). Then in the afternoon, coming down the front straight, I saw a large cloud of smoke in the mirror. Fearing the worst I pulled off in the grass. Under the hood was dry, jacking up the back and it was obvious what happened. The drivers side CV boot over-heated and burped grease all over including the exhaust(which made the smoke cloud). Looks like I'll be rebuilding with vent tubes now.
This picture is after I cleaned it up but you can see how everything is shiny. I called it a day after this as I can't imagine there was much grease left in the boot.
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