I had the contour fan setup on my champion 4-core and it was OK, but with the A/C condenser I could not get good airflow. I replaced the 4-core radiator with a Griffen 2-core with 1.25" cores the radiator is a but thinner so I think airflow through the radiator should be better. I also am trying two 13" SPAL cooling fans. This was changes I made this winter so I won't know how well they work for a few months.