Thanks for all the replies, I am going to live with it for now. Like I said cam makes awesome power right off idle which works really good with the 4-speed. May eventually slip in a hydraulic roller but it sounds if for now this is just a common characteristic of these newer type cams and there fast ramp rate. I would think the springs are not keeping up but like I said by 2600 it's all quiet again. I emailed Lunati's tech line and I will see what they say.