Im just qouting what the tec at Jerry Bickle race cars told me about the mount with a wing at least
. I had mine mounted at less angle before i installed the wing and it would drag down the track a ways before it would deploy. Bickle said to get it up in the air stream to grab the air so i did and it seems better now. Here is some good info from Bob Stroud:
Racers Q & A with Bob Stroud of Stroud Safety
http://www.dragstuff.com/techarticles/stroud-parachute-qa.html

Racers Q & A with Bob Stroud of Stroud Safety
http://www.dragstuff.com/techarticles/stroud-parachute-qa.html