I have to look at the new cam specs I put in the Hemi this year. I can't remember if I lowered the duration. It was around 285, but its a lot of cubes, and seems pretty mild. I did lower lift, which allowed me to go lower in valve spring pressure. I am down to #180 closed from #230. And I found a milder ramp rate with a Comp cam than I had, and a reduction in lash from .024 to .016....I did not get a chance to drive it and let the Sniper 4500 learn it, but it idles real nice.