Originally posted by flubyux2
Some of you guys are wrong... real wrong 
EGT is worthless, it tells you how hott you are... thats it. What makes it worse, is it tells you how hot you WERE 2 seconds ago... Its like "Hey, you hit 1680*F back there... oh and by the way, your #4 piston is melted.... " thats what they say. You cant tune reliably on an EGT guage, there are too many variables. I know too many people who have blown up supras, scoobies, RX7's and DSM's cuz their EGT's SAID they were at an acceptable temperature... but something went wrong and dont know what happend 
An EGT gauge is not for dummies, you must know what the gauge is telling you and what to do to correct it. Its not perfect, but there's nothing better. If you think top tuners are only tuning by coolant temp then you are sorely mistaken. Any tuner that knows what the fuck is going on is tuning by either wide band or EGT. Since EGT's are cheaper and not sensative to leaded gas, the EGT's win out for "budget" oriented systems.
Either way, neither an EGT or wideband will help you tune, they will tell you what they see, and its entirely up to you to interpret and change accordingly.