Mmmm… that title makes me hungry. But unfortunately I’m not talking about hotwings, but car wings. Or the more technically correct term, spoiler. My favorite WRX was having a bit of a compound issue with his previous rear spoiler setup. The first problem was that it was mounted directly on top of the carbon fiber trunk lid, which isn’t usually a problem for a moderately powered car with an inefficient spoiler design but when you get a really big, efficient spoiler combined with a lot of speed things can go bad very quickly just as the aero specialists at Voltex found out with the Cyber Evo at last years WTAC….. even with a very high quality carbon trunk lid.
Luckily he was in a straight line when that happened as you can imagine losing all rear down force in a very aero dependent car mid corner on a high speed sweeper would be catastrophic. The other problem was due to the stress on the the trunk lid, the carbon was starting to see stress fractures not to mention the old spoiler (that will remain nameless) was also seeing stress fractures on the mounts. Needless to say and entirely new combination was in order.
A call was made to an up and coming U.S. based composite aero company Kognition , for their top of the line race-proven spoiler setup designed specifically for the WRX. This thing is no joke, and installation isn’t for the faint hearted as it requires cutting slots in the rear quarter panels for the wing mounts… you’ll see why in a minute. The first step is to figure out exactly where to place the provided templates, cross your fingers that you have them in the right spot and then I drill 2 holes at the end of each cut before moving to the die grinder.
Then hold your breath and try to cut as straight of a line as possible into to the pristine quarter panel. No pressure
In order to get the best fit possible I cut the slit slightly smaller and then finish it with a combination of different sized files. It takes a bit more time and patience to do it this way but I think the end result is definitely worth the added labor. You also have to take care not to put too much heat in panel with the die grinder as it will burn the paint which is especially noticeable and more difficult on a white car. I have found the recipe for success is multiple passes and not staying in the same spot for too long.
Nice and tight.
Which, while obviously looking nicer, will also make it much easier to seal off with silicone sealant to keep the trunk from becoming an aquarium on those rainy track days.
The next step is to drill holes directly next to the frame rail which is where the lower wing mount will sit.
Then silicone around the holes before mounting them in place.
Here you can see the finished setup. The obvious benefit here is that all of the downforce created by the spoiler is now transferred much more efficiently directly to the chassis instead of the flimsy trunk lid.
With the rear spoiler addressed, we now focused on adding a bit more front downforce to hopefully balance things out a bit in the form of canards, or as they are also referred as dive planes. It’s funny, one is an airplane term, and the other is for submarines. I started with these poster board templates I made specifically for the 06-07 WRX/STi front bumper and then transferred them to aluminum.
Then I stared on the time consuming process of making brackets to mount them out of 90 degree aluminum.
Lots of them.
And here they are test fitted to the bumper.
And finished with a quick satin black paint job.
Yep, the cage is still there and I still love it. And I’m pleased to say the POR 15 paint we used is holding up very nicely.
That’s all for now, back to the classics.