I tried it at a straight line more like the lifter to rocker and got .309 and where it is in the picture .308. All I wanted was to get a idea what cam was in it. I think I will make another one for the intake and play with it and see if the duration comes out, but I wont do it till I have one on the stand and have the degree wheel on it of coarse. You ask mic the lobe, I didn't want to pull the cam if it was big enough.