Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB

- Cosmetic Modification (Interior/Exterior/Lighting) (https://www.ft86club.com/forums/forumdisplay.php?f=36)

- - BRZ STi Wing Gurney Flap (https://www.ft86club.com/forums/showthread.php?t=19836)

Quote:

Originally Posted by DSOmegaX (Post 630066)

:thumbsup:

B@t™

Quote:

Originally Posted by chanomatik (Post 618679)

ATL BRZ might be the only one besides switchlanez that hasn't put away their BRZ for the winter that might also have the gurney flap and have had an opportunity to drive at "high speeds" with it. I know ATL BRZ has for sure, so hopefully he'll chime in.

I did track mine at full speed for the first time in early December, but I hadn't done any really high speed driving before installing the flap, so I can't really comment on that with any validity from my own personal experience. I am however certain that it's functional. The same design application is all over the motorsports world.

If you look really closely you can see the vortices coming off the back of the wing from all that downforce pressure squeezing the moisture out of the air... :lol:

http://i.imgur.com/28cgG.jpg

Awesome pic!! Thanks for sharing. You really can see those crazy vortices flyin!

so....installing the Home Depot molding may result in some smaller vortexes?

:lol:

Any tips on installing this?

Not really. I test fitted it a couple of time where I wanted it. Peeled the sticky tape back on the left and right sides. Lined everything up, presssed and then peeled the tape out as I was pressing along. Last I drilled in the holes, dropped in the anchors and applied the sticker.

So this thing costs $136 + $80 shipped? Anywhere to get it cheaper?

Nope it has to be imported directly from Japan. Afaik japanparts is the cheapest.

Quote:

Originally Posted by DSOmegaX (Post 630054)

I added a metal badge to mine. Came out nice.

Attachment 23680

Just wondering where you found the metal badge?

Quote:

Originally Posted by MiniGuy (Post 690181)

Just wondering where you found the metal badge?

You find them all over ebay :thumbup:

Sent from my GT-N7100 using Tapatalk 2

Quote:

Originally Posted by JPxM0Dz (Post 690334)

You find them all over ebay :thumbup:

Sent from my GT-N7100 using Tapatalk 2

Yeap. Just search for "STI front lip aluminum badge."

Thanks JPxM0Dz for that btw. :happyanim:

Quote:

Originally Posted by JDM-dono (Post 502253)

If supposedly air does reach the gurney flap you'll have a higher pressure region above the wing (than without the gurney flap)... In essence it's slightly functional but not to the point that it's measurable improvement in downforce IMO.

EDIT: Think of it as air hitting a brick wall, there'll be high pressure region in front of the wall. By having air hit the gurney flap you'll have high pressure above the wing.

This is not really true. A gurney flap or wicker changes the flow characteristics at the trailing edge. A small vortex (twirling air) forms behind the flap. This helps decrease the boundary layer (layer near the surface with rapidly changing tangential velocity where shear stress is not negligible) on the low pressure side (bottom of airfoil on cars) increasing the effective camber of the wing. This is how the downforce is gained on gurney flaps. It does also increase the high pressure zone at the top of the wing, but not enough to do anything (low pressure side is where all the work is done :D)