I was looking at the proposed ratios and possible rules for NASA’s upcoming ST4 class and it seems like a really good place for those of us with Challenge cars in the original configuration. The 12.0/1 with a possible +.1/.2 for smaller tires and no aero seems like very little would need to be done.

I did do the upgrade myself, but I have been seriously thinking about going back because of how reliable the car was before the changes. How many of you who have retired your cars to HPDEs or similar would consider coming back?