I have a 2004 Ram 5.7 Hemi. I have installed a Comp cam 268 and have it running great. I?m trying to get the cam to chop but no matter what I do with proportional it will only slightly chop. I have The Tuning school book and on pg 149 it explains how to do it but it will not work. I have adjusted all spark tables and anything I can find that might help from mild to wild with no success. The best I can get out of it shows timing jumping from 25 down to 5. Anyone had any luck doing this?