take your digital angle and put it on the lower frame rail and zero it,..
then see what angle your wing has,...take note of that angle then add
1 degree increments of more angle untill you start to see MPH drop,..
then go back 1.5 degrees. or just adjust untill it stops skating around,..but dont be fooled by loose condition as appose to spinning the tires by power.
Depending on the wing itself some run 0 degrees to 2.0 degrees in their wings 200mph plus cars,..or untill they hit greasy tracks then they will have 2.5 to 3.250 depending on HP or grip.
hope this helps
SMOLDERY SMOKEY BURNOUTS TO YOU ALL