Tranny coolers and torque converters

[Absit]

There's not a lot of information here for automatics in general so here are my questions.

What's the optimum operating temperature of the tranny (particularly a 2G AWD)?
Do tranny coolers require a thermostat or are they just run always open?
How big of a tranny cooler do I need (goals are 600AWHP, daily driver and autocross with one or two drag runs a year, maybe)? I'd like to mount it where the SMIC is/was.
Should I mount a fan to the cooler?
If I mount a fan, should it be always on, thermostat controlled, or manually controlled?
At what point do I need to upgrade from a restalled torque converter to something like IPT's 9" billet? Will I retain my daily drivability with the 9"?

That's all I have for now, thanks for the time.

 

[Absit]

Ok how about this, is there a specific other forum I should check out to get answers regarding our automagic transmissions?

 

[Below Ambient]

im not really sure about the size of a decent cooler, but anything is better than stock, so if you are planning on running 600HP i would choose carefully... i think if you are going to see alot of stop and start id be concerned about a fan since you aren't getting any flow through the cooler, but i personally think its overkill...

 

[the_mork]

I know less than I'd like about transmission coolers but if you hook one up in-line with your stock cooler then any size is helpful. This is the one I'm currently looking at for a medium horsepower autocross/ice rally car Amazon.com: B&M 70264 SuperCooler Automatic Transmission Cooler: Automotive I suspect that it is capable of cooling more than what I need. Operating temperature is going to be heavily dependent upon where you place your probe so the important part isn't what temperature you're operating at but if you are going out of your normal operating temperature though I've heard commonly you're looking at 150*-200*F with a preference for being closer to 150*F. You also wont need a thermostat in any way especially with most bar and plate coolers as they generally have a flow control system built in to maintain a happy temperature. Avoid tube and fin if you can (and you can).