[MulsanneMike]

I'll go out on a limb and say there is little difference between the Toyota's underfloor and the ACO spec. For starters the Toyota's wasn't simply an flat plane as mandated by the ACO for next season. It's a graceful arc. The MkIII's rear exit height is well above 200 mm. Also, the strakes are arcs, not parrallal to the centerline (as would need to be per ACO'04), that's a very large difference as they are generating a nice vortex because of their arc relative to the centerline. I haven't checked their forward leading edge compared to ACO'04, but I suspect they are well forward of that.

Now lets look at the MkIII's aero performance, these numbers come directly from Hiro Fujimori:

Downforce:
4061 lbs. @ 150 mph, with 929 lbs. of drag
5848 lbs. @ 180 mph, with 1338 lbs. of drag
7220 lbs. @ 200 mph, with 1652 lbs. of drag

Peak downforce: 9,000+ lbs. at 200 mph

Lift-to-drag ratio: 4.37:1 (the comparative L/D is decieving to below as GTP cars were pretty dirty at high downforce levels as they had prodigous hp to move them through the air and were less constrained by drag than say contemporary Group C cars)

So that puts the MkIII's downforce easily 4500 lbs. (at peak) more than any contemporary LMP/LMGTP. Consider that the ACO'04 rules are aimed at a 25% downforce reduction with a 10% drag increase. So if a top LMP generates 4500 lbs. for 1000 lbs. drag (4.5:1), you'll be looking at 3375 lbs. downforce for 1100 lbs. drag (3.06:1). I'm pretty confident we'll see similar reductions for '04 cars despite the designers best efforts. Give then a few years. Suffice to say, the ACO'04 rules will not be producing 9000+ downforce monsters, ever.