[QUOTE=EF 07GTCS;5808610] You should check out the s-197 they run at Bonneville,it has a nice flat spoiler.I'm sure every spoiler serves a purpose with engines producing lots of power/torque. The first wing used had a cable to pivot so it would provide better breaking.What they didn't expect was the extra down force and traction on straight runs,the car(Chaparal) was very light in the rear.That was back in the sixties and it changed racing forever.The Dodge Datona had such down force the tires couldn't handle the added pressure. But Goodyear came through and the cars were reaching speeds up 215mph+.The 69' Taledaga Torino didn't have the wing or the nose but they used the rear bumper up front to clean up the lines and they held their ground.
The majority of owners drive ours Stangs on the street with minimal power compared to the Cammer torque monsters they run on the track.Not many would risk finding out just how much downforce or aerodynamic our cars really are. I've run both 06' and 07' GT's at 140mph plus and with the stock wing and the V-6 spoiler and couldn't believe how stable the s-197 is. I've run the (71')Pantera(underconstruction) at 165mph and could have gone a little more,then again the the car sits low and has a massive deck lid that provides the downforce needed for high speed romps.

If a guy puts a tall wing on his s-197 its ricer but Ford stuffs one on a Cammer Stang it really is a bad azz American Thumper.

 

[QUOTE=Poco;5809039]When you run at Bonneville you want the (feather on a arrow effect) to keep you straight when you do loose traction . Loss of traction in inevitable to a point at Bonneville and for the higher levels of drag racing The key is to back down the down force until loss of traction and then put just enough back to give you a cushion to play with. down force = air drag and loss of top end speed. The less down force at Bonneville or at the drag strip the better unless you lose all down force and cause lift.
Chaparal also put an extra engine in one of his cars with a propeller facing down in the center of the car to suck the car to the ground. It was quickly ban in racing rules.
The front of the car has a large effect on the flow of air under the car but the diffuser on the rear of the car in the pic is there to flow the air better which gives it a bit more down force due to the under car out flow of air.(low pressure under the car = down force)

For a street car I have always wanted to put so many wings and canardes on a car that would normally do 140 mph and give it so much down force that top speed would only be 110 mph . I would need very stiff springs to prevent down force squat . Just one of my many dreams ( imagine the corner speeds once the down force started to kick in.

 

The V-6 spoiler does provide superior downforce as mentioned from what I've read.

Even the mini ducktail spoiler on the back of the new Corvette ZR1 provides enough added downforce to make that cars 205 mph ride much more stable to the Z06's according to some of the articles.

I chose the CDC ducktail rear spoiler because it provides less horizontal air drag than the stock 06' GT spoiler and the same or more downforce. So does the street scene ducktail and the CDC one according to the early highspeed testing 140+ mph back in 05'.

Obviously as mentioned all the real race cars of this type have the high wing for real downforce it seems (like the race Viper). Erik

 

Love it when they say: Internet special $120K....

 

I'm not trying to be a jackass about this, but where did you read that?

The V6 spoiler is completely useless for any downforce. In fact, it most likely counters downforce altogether with a slight lifting of the rear end. Any air that flows over it will wrap over it and vortex under the lip - pushing air up on the bottom side. It's simply an ornamental piece nothing more.

Read this:
The efforts made to improve the KR's aerodynamic behavior at high speed are intriguing, because they're focused on balance rather than outright downforce. While the KR wears a revised splitter that reduces front-end lift by 31 percent and drag by 3 percent compared to the GT500, the rear wing's reduced angle of incidence fractionally reduces drag and actually increases lift at the rear axle relative to the GT500.

 

I think any kind of Mustang - V6, GT, 500KR, Roush, Shelby, or otherwise - at 140 or higher doing anything but going in a straight line is going to break traction.

Whether or not the downforce statement is true - it is certainly a moot point.

 

[QUOTE=Poco;5809039]My Stang is only my 2nd muscle car. My 1st was a 1997 Firebird Formula. I've run both up to 110+.

IMO, the Mustang likes to wander too much. It feels stable, but I also feel like I have to drive it.

The Firebrid I had could be driven at high speeds with one pinkie on the steering wheel. It had no "road wander" at all. It drove as easy at 110mph as it did at 30mph. By comparison, I'm a bit disappointed in the Mustang in that area.

 

The KR at my local dealership has the v6 spoiler on it also
Joe Cooper Ford

 

The spoiler on it sucks, plain and simple. It's just to small and looks out of place on it.

 

[QUOTE=Poco;5809039]Those de Tomaso Panteras are absolutely awesome!!!