-DISCLAIMER- If you try this, it's your decision...
If you really want to get an idea of wing effects...
Take the wing off your model car.
Find someone foolish enough to help you that has a convertable 1:1 car.
Get in the back of the 1:1 car.
Take your model car in both hands and raise it above your head.
Have the driver take in stages it to 10mph, 20mph, 30mph and 40 then 50 holding the car nose up, nose down and then flat on each stage.
Stop, put the wing back on the model car... repeat and spot the differances.
On the serious side, i have broken a wing mid race and suffered on the jumps.
More recently i have been running a sportwerks wing which is quite small surface and small side dams.
My car was jumping badly at a new track featuring "hang time" jumps rather than short tech jumps... it was going nose down and taking a LT of throttle to keep it up. Rather than mess with the suspension for the short run we were at the track i switched to a Kyosh wing for a in the name of experimentation - a lot bigger and stronger than the sportwerks - and straight away i was jumping nicely. Not enough to make up for the rough suspension but enough not look like the worlds worst jumper...