I'll start by saying I'm ignorant about auto-x rules and classes. I know what mods lowered my times the most and it wasn't power. Now let's see what might help. Find the right brake pads. A quick bite and easy to modulate pad will take time off the clock. Find out what the fast cars are using. Getting the car lower is a must if legal. Is going with the thinnest spring pads doable? If you don't want to lower the front, lower the rear at least. Don't go crazy. You need to keep a little rake front to rear. Run the tires the fast cars use. The right tire is big. I liked 0 toe in the front. It's bad (won't go straight) on the street but makes the car turn in quickly which the Crossfire needs. When I did a sudo auto-x I found the slow steering a problem. Perhaps a smaller steering wheel?

You can't change the cars dynamics. I started getting fast when I stopped trying to make my car do what I wanted and starting driving it the way it wanted to be driven. That will take clearing your mind of preconceptions about how a fast car should drive. Don't limit your imagination and you'll discover lots of tricks. If what your doing isn't working (driving wise), change it. Don't try to do it better. It's not working!

Les