[TELVM]

Originally Posted by b1gmoose

Any ideas what an ideal EGT would be? How hot can it get before I have to worry about the valve burning?

Have a look here, wise advice: Tech Page

Would I have to go to a premium fuel to cool it down running more lean & advanced? Would it benefit?

Unless you've modified the hardware with octane-raising mods (raised CR, raised boost, advanced intake camshaft timing, higher intake air temps, warmer thermostat, etc.) you should be able to run the engine on the octane specified by the manufacturer and no higher octane should be needed. If you experience pinging after advancing ignition timing or leaning AFR, retarding ign timing and/or enriching AFR a bit is easier & cheaper.