update on combo
So far the best run on the car was 9.87 at 136 in cold air. But consistanly running 10.0's in 70-80 degree air. I decided to replace the cam and I emailed several cam builders with my combo and based on several recommendations ended up going with a Lunati grind with 110 Lobe seperation, 272/280 duration and .722/.722 lift. Installed cam at 107. Ran it for first time today and at 35 degrees ignition advance it was breaking up badly above 6000. Removed 3 degrees and it improved. Removed another 2 degrees for a total of 30 degrees to clear it up. The best run was 10.11. Checked the torque converter and verified it is stalling at 4000 and I will be replacing it after tuning in the new cam and putting it on the dyno to get its new torque curve to build the new converter. I am a little confused as to why 20 degrees more duration would require 8 degrees less advance. Anyone have any thoughts on what might be the issue?