Any feel like having a tuning discussion?

[DURAMAX TIM]

Originally Posted by H3.007

F5 - Are these tunes legit? If so, why wouldn't GM be offering them?

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.