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Originally Posted by H3.007
F5 - Are these tunes legit? If so, why wouldn't GM be offering them?
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GM and others are after emissions stuff 1st and reliabilty/warranty 2nd (maybe).
got to keep the epa happy.
that's why they have so much torque management off idle, save parts I'm sure.
I know on the diesels it used to be u had to roll out black smoke to make power but w/ EFI we can make more power and very little smoke.
stock Dmax (LLY) is close to 600 rwhp or more w/ tuning and diesel only.
year ago 500 was really tough to get.
but an allison will only handle 350-400 though w/o upgrades.