Tracers in AH are tricky. I think they are only useful for 50 cal armed planes.
No tracers will allow you to shoot down other planes because they dont jinx to evade since they see no tracers. Especially true against runstangs, hunstangs and 109's that run and run and run.
No tracers allow you to get on someone's low 6 and fire a HUGE amount of lead at him and he wont know until he gets hit with a lot of bullets. Generally you miss the first 10 bullets and the tracers tell the guy you're behind him.. and he evades, missing the rest of your lead stream.
Tracers ON give you the ability to scare someone into turning and allowing you to catch up.
So it all depends on your aiming, ammo load and flying style.
