mudguppy
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well, i don't think you'll get 400hp out of a non-IC'd 6bt with good EGT's without water, water/meth, or an enormous turbo that may not be street friendly. well, you could do it w/ twins and maintain good street manners, but i believe it would still be outside of the 'managable' range, for me anyway. i'd just rather keep it IC'd.The thing is that I know of trucks with no intercooler making over 400hp, now they run a little hot at WOT but managable. Can the cat not run worth a darn without the intercooler? ....
my current Cummins setup will peg the 1600° gauge pretty quick because i don't have enough air. so if i took the IC away.... i don't know, but i'd expect my EGTs to be at least 200-250° hotter all the way around.
the Cat will still make the power, but longevity and potential durability for the given duty cycle will suffer.