Here are the cam specs: Crane powermax cam part # 134241, (Duration @ .050 is 226int/236exh) Advertised duration is 286int/296exh Cam lift is, .534 int lift/.553exh lift. Lobe seperation is 112. I hope these numbers clear things up. Do you think this cam will lope at idle? ( I love hearing the cam at idle).......Thanks