Good luck in figuring it out. I can tell you this much, we don't run on a drag strip we run on a course, this course changes from one run to the next. Try running behind the Beast or the 911, these high HP heavy cars just eat up the fragile surface. Sure you can add suspension, which many including myself have done. Still it's not going to be the ends-all solution.
Here's a video of the 62 getting sucked into the center of the course due to the soft middle. Car has always just blown through anything El Mirage put in front of it, just not this time.
https://www.youtube.com/watch?v=FL-FcnkWLZgI am not sure how to take a video from my FB page but there is an in-car video of the above spin that clearly shows the course condition & it's affect on the cars attitude.
Just Trying to Help
Chris Campbell