Learned a lot this weekend at the latest SCCA event out at crows landing. This season I have been running the Avon formula Ford racing slicks. According to Roger Krause racing, the Formula continental racers love them for their consistency and ability to take a lot of heat cycles.
Auto crossing introduces a different set of challenges for racing these tires and it has been a challenge to figure them out. It didnt’ help me out that I also installed a new set of shocks, and I have been working on tuning them.
The weekend started out early considering that I ran in the last run group. I arrived on site so I could take advantage of the flat level concrete (compared to my garage floor) and I proceeded to drop the rear ride height. On my car if you change the ride height, I really need to reset the corner weights, so I brought out my scales and got to work… And immediately collected about 6 supervisors, all that was missing was the beer…
After corner weighting my car on a flatter surface than I have at home I really need to design a setup platform so I can do proper alignments and corner weights at home..
At this event I got a good handle on the shocks, and I have a few adjustments to do, but the real discovery for the weekend was the care and feeding of the Avon racing tires.
First, these tires generally give their best run on the first or second run. After that, you will almost always be within a few tenths of a second of the best time. The consistency is great, but it can be a little frustrating if the best time is a bit slow. they are not like the hoosier tires where you can pull time by changing your line on course.
Second, the tires like to run cool. So this was the first event where I sprayed the tires down with water between each run, and this seemed to help.
Third, the avon tires really like to run higher pressures than I was running with the hoosiers. On my last run I increased the tires by 1-2 psi on all four corners and enough time to get my best run of the day.