On a good biting track you can have your shock tight
but on a bad or not so good of biting track you want
to loosen the shocks up... what hole so you have your
caltracks in... you will need them in the lower
hole and then start on the shock adjustment
EDIT
Are you foot braking or trans brake... if I launch
at lower rpms I need more air pressure than if I
launch at higher rpms