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What is the maximum EGT that a 6.0L will run at continuously with no damage. I know the lower the better but am wondering at what maximum temp will they run at with no problems for a long time.
Thanks,
1250f is generally the highest sustained EGT you'll want to run. If you are running a more aggressive tune with additional timing (not recommended,) 1200f is the max you want to sustain. Brief peaks above 1300f or even 1400f aren't something to worry about if it is just a few seconds.
Good advice in both posts above and is what I follow. I tow a lot anywhere between 5-25k #'s with a truck that's almost 10k#'s by itself with stock head bolts @ +174k miles on a Gearhead's 10k Tow Tune.