I would be very interested to see an article like that but, where the car was equipped with coil overs or any other way of altering ride height and seeing how the numbers change. I think a lot people would be amazed how much of a difference ride height and or angle of attack makes in down force and drag.

 

Depends how the car is lowered, but usually lift is reduced.

 

I know that down force is usually increased. I'm saying I think people would be surprised how much it is increased with an 1" change in ride height or a just a minor change in attitude.

Having been to the tunnel with the race team I work for I was surprised at how big even a half inch difference in ride height made. The other thing no one considers is what the car does in yaw.

 

nice...

 

bump. I think this is very interesting, and was wondring if anyone had any updates.

 

It's that damn hood scoop on the STI.

 

I really expected both cars to be more aerodynamic, [I guess looks don't stand for anything - if it "looks" aerodynamic, doesn't mean that it is]
It is also interesting to note, that these tests are performed in Russia (from pictures), it seems that US/Japanese magazines don't post these types of numbers....

 

I believe it was in the article, but a rough estimate of frontal area is usually width*height*0.80.

 

Does the japan mitsu site say anything about the cd of the IX? Also I remember reading years ago about lowering a car about an inch resulted in a lowering of the cd like .04 or so.

 

very good thread,,really .
i would love and i gues some other guyes to see more test with aerodinamics,,
in different mods.
lets pray and hope someone will update this pretty old thread and will come with some new stuff

 

Some decent info in this thread, assuming you pick and choose what you actually read. I know that the aero left something to be desired, but I didn't think the Evo was so outclassed. The MR would definitely have done better given the reduced lift up front and increased downforce in the rear with the VG and wickerbill.

 

good info, anti lift pieces could really help the evo.

 

I'm no expert on aerodynamics, but I did stay at a Holiday Inn Express last night . . . so here are some thoughts. . .

To say the EVO aero is not as good as the STI or that the EVO is outclassed in the aero department as compared to the STI is just wrong.

One key thing to look at, that I don't think anyone has mentioned yet, is the aero balance front to rear. This, more than total downforce, is what will determine how the car handles at speed. The difference between the F and R on the EVO is only 326 units. The difference between F and R on the STI is a whopping 838 units!

This is one key reason why in racing situations folks say that the STI is a pushy pig where as the EVO is more neutral. Having more total downforce doesn't mean a thing if you can't get the front tires to bite coming out of a corner and you either have to wait to get on the gas or plow wide off the track. . .

The EVO engineers could have given the EVO more rear downforce very easily, but that would have upset the handling balance and made the car slower. Even without the "zerolift" package on the front, the front aero on the EVO is better than the STI. It is also better balanced by the rear, so I would say the EVO aero actually kicks Subaru's butt. . .

My theory is you start with the end that is most difficult to make downforce (usually the front). You max that out, then you use wings and diffusers in the rear to balance the car. . .

One last thing - the idea that the EVO would make downforce at lower speeds is not very likely. Most aero systems I am aware of start from zero DF @ zero MPH, and then DF grows at a logarithmic or exponential rate with speed. Please show me any type of wing that makes negative lift at one speed and positive lift at another speed. Maybe it's possible without active aero, but I haven't seen it . . .

EVOlutionary

 

anybody think this will help?
its for an evo

 

^Interesting. Since lots of people are mentioning things they'd like to see for christmas I want to see a comparison of a RS aero, MR aero, and then AMS Time Attack Evo, Buschur Time attack Evo, and Evasive motorsports evo.

Also I think people have aknowledged these short comings like the Beatrush undertray, Voltex diffusers, People switching to JDM rear bumper, etc.