Spoiler / wickerbill
 

Well, I believe I've come to the point in my tracking adventure that I am researching aero: adding a splitter and spoiler (not a wing) and maybe rear diffuser.

Looking for others'experiences, recommendations, warnings, etc.

Planning on making the splitter.

Looking for a spoiler just large enough to be able to add an adjustable strip to it's rear surface.

MY14 BRZ

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Here are a couple I like:

https://i.frog.ink/k0Xat1bp/ast-sfrs...=1533424336.33

https://86speed.com/images/thumbs/w_...continued.jpeg

https://ffperformance.co/wp-content/...ker-Bill-3.jpg

norcalpb
Thanks.
The first looks too narrow. What's the second one? I like the last two.

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Second one is Perrin.

Verus was nice enough to do some virtual air flow testing on it:

https://www.verus-engineering.com/bl...ap-analysis-31

I’m iffy on it because it may produce a ton of drag at high speed, which our little engines don’t like. But real world application can always differ.

norcalpb
Not the Perrin unit, it mounts on the OE spoiler. I will remove my OE spoiler.

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norcalpb
I can't find the second one (no name or logo) as Perrin. Would it mount directly on the back of the trunk lid?

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The Perrin unit that mounts on the OE spoiler is listed as DISCONTINUED on 86speed website.

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Well would you look at that, it is finally a discontinued product. And no I don't think it would fit without the stock spoiler like it is intended to be.

You can also try your hand in making your own, similar to this:

https://www.good-win-racing.com/imag...85/61-2833.jpg

norcalpb
I think I'll look for a low profile unit to mount on the lid that will allow me to add a strip to it's back

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949 Racing project car:
https://www.ft86club.com/forums/atta...1&d=1605916907

Why are you so against adding a rear wing element?

Spoilers like the 949Racing car result in a high drag effect as a results of a massive wake zone immediately behind the element itself.

My Versus front splitter + UCW Rear Wing at 6* AOA resulted in 2 mph less VMax at Mid-Ohio (122 vs 120 mph) into China Beach and still was ~1.5 seconds faster on the same tire same conditions.

You just made me realize that an adjustable rear wing could be moved to a lower drag config for the drive home because mpg because I'm driving this car Monday morning too...

Right, when I tow my car I throw my wing back to 0 AOA. I haven't really noticed any MPG hit on the towing aspect. DDing around back and forth to work (35 mph roads 10 miles total) I still get 28-29 MPG. Nothing abnormal.

Those type of spoilers do great at low speed (think all Street Prepared style classes). Anything above 60+ you're going to see a massive negative impact

The drag from it is not bad. I have had one for years.

That is what I am planning to do with my GTC200. The drag from it is bad at minimum AOA. Going to build custom mounts with more adjustment.

I guess I'm not discounting a wing; an instructor I respect suggested a wickerbill.



Did you ever entertain that before adding your wing? (I'd love to be able to get to 120 on the back of Mid-Oh!)

quote: M0nk3y
Spoilers like the 949Racing car result in a high drag effect as a results of a massive wake zone immediately behind the element itself.



Kyle, I thought this one was way on the drastic side!

Hmm, so follow up question. Why does the instructor tell you to get a wickerbill? What's going on with the car that would dictate that (just trying to get a thought process behind it).

As far as me, no. I didn't entertain it because in NASA TT the point deduction for a rear wing element is the same regardless of what occurs and I know a wing is better overall for downforce levels I want to achieve.

And here's the comparison. Wingless vs Wing

Wingless
https://www.youtube.com/watch?v=mp8A...nel=KyleHerbst

Wing
https://www.youtube.com/watch?v=aTF8...nel=KyleHerbst

Reasons to do a spoiler/ducktail over a wing? Cost, simplicity, convenience, rules, etc.
Not performance.

A proper wing will be far more effective.

- Andrew

Okay, well, I feel a lot better about a WING.


Now for any input on various brands/models. . . . . . widths, riser heights, etc.

Verus and Nine Lives Racing are good companies that provide CFD data for their designs.

https://www.verus-engineering.com/sh...erodynamics-40
https://www.verus-engineering.com/sh...10?category=40
https://9livesracing.com/products/th...67f41453&_ss=r

APR also provides freestream CFD data.

More important than having a wing is having a balanced aero. A big ass wing without a front splitter (or with one that doesnt do shit, like 90% of "premade" splitters out there) is going to make the car understeer a lot, for no reason. Racecomp and monkey said it best, just make sure your splitter is up to the task, just sticking a flat piece of *insert your prefered material here* below your bumper is not doing much of anything.

If you're not point/class limited, just get a big wang. https://9livesracing.com/collections...gt86-2012-2019

With the proposed SCCA TTT4 changes, people will be forced to run a TINY joke of a wing or a spoiler like the 949 racing is running. I will be for sure going with the spoiler in that scenario.

And now, looking at slots in the trunk for chassis mounting da wing!! ( bought a second lid! )

Why do you want to chassis mount?

check out this post and another I made a few posts back in my build thread about making a simple chassis mount. Mine has stood up to 130 mph on a nascar track.

https://www.ft86club.com/forums/show...&postcount=177
https://www.ft86club.com/forums/show...&postcount=155

To avoid any flexing and may be using a unit that doesn't include mounts for our platform.

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