how 'bout when your at the dyno and just made a pull and you swap out a couple of parts, your ready to make another pull and your iat is at 150 still...or your at the track and you just made 2 passes while it was slow and now everyone is showing up and you get back in line and your paired up w/ the punk you lost to last week and your iat's are at 155, your tranny temp is over 210 and engine is 230....and your not allowed to turn on your a/c.
and for manual off...how 'bout when you go off road and you have a water crossing to make and instead of throwing water around like a blender, you turn off your fans for a couple of minutes while you cross.

 

thats what they have fans for at the dyno..unless they have a shitty one that wopnt cool it down, the one i go to works good.... ive never heard of having to turn your ac off at the staging area if so just turn off you truck but turn the ignition on and just put on the defroster with no AC that will put em bot on hi or 1 on hi depending on the temp.. also 210 and 230 thats pretty hot... somethin seems wrong there.. for offroading i guess that would be reasonable

 

You can tune the fan turn on and off temps with HP Tuners editor. You can also force the fans on with the HP Tuner logger while you are in the lanes