OK, numbers are in.
As I did not have that much time I will mostly just post the naked numbers for the complete car.
The simulations were carried out with the car I showed when I tried the open side pods.
So raising the front wing 20mm barley affects drag but reduces downforce by 4.7% and shifts CoP 12cm backwards.
Lowering the front wing by 20mm (illegal) creates 0.6% additional drag with 5.4% more downforce and moves the CoP again by 12cm but to the front.
The rear wing has a large effect. The two element wing creates 15% more drag with only 7.7% more downforce, shifts the CoP 14cm backwards and costs about 300 counts of L/D compared to my single element wing.
I also put the force distribution images from my race 5 entry beside some of the ones you posted:
On the downforce images on both cars you can see four distinct sections: front wing, suspension cover, diffuser and then rear wing. If you compare the diffuser section yours is comparable to mine. You rear wing is not though. On both cars the largest bar reaches about 800N but on mine the other two bars are larger. On the drag images your bars are larger than mine. So to me you have to improve that rear wing for the next large step in your development.
If we look at the first two sections, your front wing is creating more or similar levels of downforce my car does. It seems at the cost of drag though. You suspension cover could also use some work if you compare with my car.
Still, having the numbers from above in mind I have to say you need a better rear wing. Also I would say your rear wing deserves some nicer air flow to it as it seems that your rear wing does not produce as much downforce as it does on my car. This surprises my as your suspension cover seems to do exactly that.
What do the others think?
I think this small check clearly shows that your rear wing is the next thing to work on.
