I love C,B,& A, but hate how the leaderboards are ruined with the stupid Dodge Dart! God I wish they would fix that glitch!
I've read on fm.net that they may actually do a leaderboard cleaning soonish. Let's hope it's true ^^ I think they went too far with motor swapping now, I'm glad that GT5 didnt had that feature.
For me, it's probably C, B and D class, in that order. It's mostly because of the car selection.
The motor swaps aren't the problem, really. The main issue is how the PI is calculated.
That's exactly the problem. This leads to very low top speeds. The PI test track seemingly features at least one very long straight, like the Mulsanne or the Döttinger Höhe. Thus, cars with a low top end will have a low PI.If I remember right, there was an odd glitch with how PI was calculated during an engine swap with transmissions without a long "highway mileage" final gear, which muscle cars tended to lack. I'd imagine a quick, dirty fix would be to force a racing transmission with a engine swap, unless other methods can be used with patching.