Found these aerodynamics comparison pics from IWSTI and it does not make any sense to me.
Could someone explain the verdict of this test.

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07 Silver STei
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3 year mechanical engineering student and i haven't come across units of (H) or (HM) before.


but from looking at the first pics, the red arrows (P) are forces/loads and the blue circular arrows (M) are moments.


i think the evo is the winner but the wrx has less of a wake forming when it comes of the rear wing.

Any more info on what the forces and moments are in relation to? Or even a bigger/better quality picture?

If there is something to relate the arrows to I could probably decipher it.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]

It also looks like with the EVO the wing is LIFTING the rear end whereas the STI its pushing it down?

Judging buy pictures 2, 7 and 8. Which is wierd because the purpose of the wing is to push down at the rear right?

Kato, sadly these are the only pics/info the yanks provided.

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07 Silver STei
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Evo still drives better.

End

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^ I'm with my lover on this one.

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MY05 STI track car | VF Clubsport

Faggots!

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'04 E46 S/C M3 Coupe

are the units German - like they use PS vs hp/kw ?
Just looking at the sponsor banner in the background ?
HM = NM ?
lift, drag, lateral forces, yaw, roll, and pitching moments ?



Found more details...... http://www.tunernetwork.com/forum/showthread.php?t=6072
The numbers are in newtons. (1N = 0.22lbs).

The EVO has 46.86LBS of front end lift and 9.68LBS of rear end lift at 90MPH, at 124 MPH it has 90.42LBS of front end lift and 18.7LBS fo rear end lift.

The STI has 57.64LBS of front end lift and 38.06LBS of rear end downforce at 90MPH, at 124MPH it has 111.1LBS of front end lift and 73.26LBS of downforce.

STI advertises an increase of front end downforce of 36% from adding the STI V-lip to the front of a STI. If the 36% is true the numbers would look like this.

The STI with a V-lip has 36,89LBS of front end lift and 38.06LBS of rear end downforce at 90MPH, at 124MPH it has 71.1LBS of front end lift and 73.26LBS of rear end downforce.

It is scary to see how much lift the front of both the EVO and the STI make.

Cracked.

H is the Russian letter for our N. (Noticed some Russian in the background)

So the values are either Newtons or Newton meters (i.e. load and torque/moment)

Bottom right of the pictures seems to show drag co-effecient. (same same)

Not sure what the reactions/moments in the 3 directions mean (can't read the subscript). Possibly the maximums/yields in each direction before traction is broken or the moments of inertia around those axis.

Side view is confusing. No reference to what those numbers mean. (i.e. is that a reaction on the wheels from the car moving forward at some speed? is that the maximum and minimum forces on the wheels? etc etc etc)

Edit: Read above post for more explanation.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]