need some input on wind resistance, what would work against the downforce? Options

[soulshadow]

I need to know what type of spoiler do you u guys suggest would be great on the downforce the wind carries. Also I need some exterior styling suggestions that would help make the celi go faster (Yes faster, not look good) against the wind.

Any useful info would be great. I was looking at some Aluminimum adjustable spoilers, but they seem like they stand out too much.

I want something that doesn't stand out (chrome, body kits), but instead help break wind resistance and make the celi turn faster, go faster and perform better.

[lagos]

i noticed that my car feels a lot more stable with the gt4 spoiler i installed, so thats a good way to go. dont get any of that park bench aluminum crap tho.

[ghostdog]

trd wing was wind tunnel tested and actually does something

[TheStreetzKing]

go to shop rite, grab the biggest shopping cart, go home and cut it a little bit and bolt it down, dyno tested and proven more horse and more downforce..

[playr158]

try looking for sumthing that provides downforce in the FRONT since your fwd it would be more beneficial to you...
but none of that exists so your sol unless custom which is always a great route.....

[soulshadow]

go to shop rite, grab the biggest shopping cart, go home and cut it a little bit and bolt it down, dyno tested and proven more horse and more downforce..
[right][snapback]347357[/snapback][/right]

HAA HAA LOL!

[lagos]

try looking for sumthing that provides downforce in the FRONT since your fwd it would be more beneficial to you...
but none of that exists so your sol unless custom which is always a great route.....
[right][snapback]347370[/snapback][/right]

i think its a myth that a wing puts downforce on the rear of the car for traction on a rwd car...i mean, you have to be going pretty fast for the wing to do its job, and by then traction isint an issue. i think wings are there to improve the areodynamics of the whole car and help keep everything more stable the faster you go.

get the gt4 or trd one.

[Silver94CelicaOw...]

For some added front downforce or better wind resistance they make Canards that you can install on the front of your car made of either carbon fiber or metal. Not sure that it would make as big of a difference as a good spoiler though. I'm sure the TRD and GT-4 spoilers are good for something. Also a good choice for downforce is a Carbon Fiber APR wing, which are adjustable and will likely get you more downforce at speeds than the latter two.

However, its a great brand and will cost you some good $$$ since its CF and actually works unlike many of the Wal-Mart variants that seem abundant on Saturns and Hondas.

[soulshadow]

I just saw Inital D epsiode 18, 4th stage and it looks like exterior styling does really make a difference, just like those coil-overs and or cusco mounts that you guys put on your cars. Its there for a reason, even if its for the ricey looks

[orvillescelica]

A proper rear wing will provide a surprising amount of downforce at 60mph. I think for our appilcations, you are not using the wing to push you to the ground as in F1 cars, but rather counteract the forces of lift that are being generated due to unbalanced pressure under the car and upward lift in the rear from the Kutta condition, a vortex generated due to seperation of the streamline airflow.

But this is all moot as you would not want a rear wing for our cars. Reason being that it would be unneccacarily be pushing on the rear, causing loads that youll need to just overcome with power. I bet it would be like sitting two people in the back at decent speeds.

Since you have a hatchback, i suggest that any raised spoiler, like the GT4, will do. The purpose of the spoiler is to promote reaatachment of the seperated airflow coming from the roof. This helps with drag as it channels overfowing air properly. So having it higher rather than lower helps, but not too high, or else it become a parasite drag element. Something that is as high as a bit below the roofline.



Have you ever seen those little trianlge pieces on the back of the roofs on Evos? Those are called Voretx generators. In wind tunnels the ideal diffuser angle so as to keep the flow attached and streamline and not turbulent is aroun 7 degrees. Sometimes thought you dont have the space or time for a 7 degree gradual slope, so you place vortex generators at the start of the diffusor to increase that angle up to 12 degrees. They work by forcing the air to seperate at that point, this creates clockwise vortcies that spiral toward the body. As the vortex spins, it draws in air above it to feed itself. This high momentum incoming air then pushes the airflow downward back onto the body allowing for a greater angle of decent than previously allowed. The trick is designing them to be the right size and shape. You want them to be the hieght of the boundary layer at that point. Any bigger and they will cause drag, and smaller and they wont do anything. Its a simple calculation that i can do for you if you want to PM me about it.

Lets see, what else. The canards as said above are a good idea. They channel air up, causing a reaction force down. Not a lot, but its something. Also though there is the trick of designing them properly. The ones you can buy are more for looks than specific function. A front splitter, an front underlip that exents outward, can help. It basically helps by keeping the stagnation point from being under the car. Due to the aerodynamic forces in the rear, the place where the air hits the forn of your car is a lot lower than you think, usually near the very bottom of the bumper, and sometimes even under the car at higher speeds. The front splitter just helps keep the air from getting under there, creating a force that pushes the car up.

I have some other crazy ideas, but none of them have been tested so unless you have a wind tunnel and a ton of time to experiment, i would just go with what has been proven to work.

[hisashi94gtst204]

Read Option magazines.

[CoSo]

Also, the 6gc had optional hood spoilers, which would reduce the aerodynamic impedance of the wipers. (I believe the drag coefficient of the 6gc is about .32)

I keep quoting a page which states the downforce that the gt-four wing generates whenever a topic such as this comes up, but it seems to yield no response so I have no idea if anyone finds it credible or not. If you wanna read about it, look here.