We have a dyno at Diesel Power here in Paducah, KY and Russ says that if you can get 70% power to the ground you are doing good. Unless I am mistaken aren't 6.0's supposed to be in the 325hp range? So 70% to the ground would be 227.5 HP so really 239 are good numbers for stock. I am going to get mine dyno'd after the air intake, exhaust, and tuner mods are done. Russ @ Diesel Power says you are wasting your money dynoing before your mods are done, they all run fairly close together.
Last edited by F550Haulin : 05-22-2008 at 07:43 PM.