GodISmE

There is a local guy here that could built it for me (composite and carbon fibre hybrid) but he needs exact dimensions or a technical drawing.
Would you guys be able to measure your wing (I know some of you are running them), take a few photos and send them to me?

Alternatively, do you know which aftermarket ones are the best options for up to 350 whp track car? Maybe I can work out dimensions based on the product specs and design the custom one myself.

Blurvision

iTrader: (4)

Considering how much R&D, computer modeling, and labor goes into creating an effective wing. I would not think many people would be happy for you to just copy it....

GodISmE

They won't know Besides most of them post the main dimensions on their product websites anyway.
I just need a few more dimensions and I can design the rest myself without coping anything. The one I'm most interested in is the profile of the wing in a cross section view.

jledford

iTrader: (1)

So just the most important one then... and probably the most proprietary.

canadarob

iTrader: (1)

Airfoils are very very precise devices.

Copying one even with pretty good measurements will probably not get you anything but drag. Also, there is a very good chance that the wing you are copying has zero RnD behind it.

Another huge note. Airfoils are designed for their application. Most of the big brands you purchase are generic per gt cars. There is a chance you copy a design that does not work for the 350z body shape and at best get a 1/1 drag to Down force (which is useless).

I have one being properly designed by a shop I work closely with. They have an Aero engineer on staff for design and CFD analysis. After that, a scale model is run through a mini wind tunnel or water tunnel to prove the CFD analysis. Final testing will be on the car if we can get access to the University wind tunnel in my area. This is the only proper way.

GodISmE

Tell that to the guys that spent $$$ on Kognition, Voltex or ARP! lol
I'll built my own, it's not rocket science and I'm not going to race with anyone or even fight for that 0,01 second during track days.
I'm doing my research now and I almost have everything I need. Lots of stuff on the internet ... even essays on physics and aerodynamics written by pro's!

pyshin

iTrader: (14)

Redacted

cyc5181

iTrader: (12)

My guess is you're trying to save money by building it yourself. But factoring in his labor and material cost, do you know exactly how much you'd be saving? And is the saving worth it?

I think a Kognition wing runs around 2k or so? And they provide a table for their wing specifically for our chassis to show the effectiveness of their wings at different length. If say it'll cost you $1k to build your own, I'd say yeah maybe worth it..... but over that, I might as well eat few more months of McD meals and get a legit wing knowing that what I'm getting is 100% functional and looks good at the same time.

If all you want is look....... i doubt your "local guy" can build one for eBay price, so might as well just pick one up from there.

dboyzalter

iTrader: (3)

I had a charger in front of me today with a sweet wing... I wish I would have tracked him down and got the dimensions... Looked to have epic down force.

bmccann101

iTrader: (16)

iim all for DIY.. but an apr gtc 300 wing is highly effective and is right around a grand.. if you have issue w that price and think youre going to build a composite wing for any significant margin less than that.. you are fooling yourself.
Thread is a moot point tbh.

GodISmE

It's going to cost me around 600 bucks so one third of what I would have to pay for something like the Apr wing shipped here plus taxes.

bmccann101

iTrader: (16)

I didn't realize you're in Poland.. Showoff Imports in Rotterdam can get you a wing w out ridiculous shipping.
either way

canadarob

iTrader: (1)

dont say we didnt warn you when you end up backwards against a wall at 120mph+.

well.... at that point you probably wont be able to...

GodISmE

Everything is on the net, it just takes way too much time to research it all so I was looking for shortcuts. Many of the popular companies actually publish the profiles. e.g. APR. Kognition (I read) copied the shape of the F1 car's wing (flap).
It turns out, I actually don't need to copy anything. Here are a few good sources of info:
http://www.pro-touring.com/threads/1...ck-Performance
http://www.nissanroadracing.com/showthread.php?t=3095
http://airfoiltools.com/airfoil/deta...rfoil=s1223-il
Lots of videos, articles and essays too.

I will probably go with the S1223 shape although my initial design was based on the Kognition wing:


I'm worried though that this shape will be too much for what I need, that's why I think S1223 will be better.

The only thing I don't know now is the size of the whole thing. 10'' chord with a 68'' span is what most guys are running but isn't this too much without at least a 2'' front splitter? I think it might be.

I could use some advice here from guys that race or track their cars regularly. I have suspension mods, RPF-1's, semislicks but apart from that my car is still stock (engine and weight) and I have a feeling that I might not benefit so much from installing a rear wing until I strip everything out (reducing weight at the rear) and add a front splitter which I can't do yet - unless it's something quickly removable - I still drive the car to work sometimes.

bmccann101

iTrader: (16)

You will indeed need a solid front splitter, and possibly a bit of front to back rake to the vehicle to get balance for the downforce.. Pretty good video of a z in a wind tunnel showing the balance effects of this on YouTube

GodISmE

You mean Sasha's car? Yeah, but he has a yuuuuge (as your new boss would say) wing!

bmccann101

iTrader: (16)

Not very large at all tbh, reasonable for the chassis, and commonly used w good success.

GodISmE

It's big and it has 2 elements:
https://frontstreet.media/2016/08/10...-carousel-9412

By the way, what is he saying at 5:16? I can't understand him:

armt350z

iTrader: (6)

Both wings you are discussing, the Kognition and the s1223 are not going to be optimal for your car. The coefficient of drag and your L/D ratio for those airfoils are better paired with higher horsepower cars.

Find a wing with less drag and add a gurney flap. It will likely serve you better if you are determined to go down this path.

GodISmE

So do you mean a smaller wing or a flatter airfoil? At which point is it actually worth adding some proper aero in this car?