Well, let me get the game updated, and I’ll see how bad things are and tweak my cars to fit, or mention any budget-related problems.
Honestly, at this point, I’d say that any cars now blowing the budget should be allowed, and if engines are knocking, bump them up a fuel grade. They were legal before, and the extra fuel octane will give engines that were tuned to the limit a bit of breathing room. Of course, if they redid turbos again, they could have screwed up everyone’s tunes to the point of requiring manual fixes. I’m willing to do it, but I know a lot of people aren’t.