Jreo, you have a knack for making these vehicle 3d models, they look great!

As for the engine itself, it's very impressive, with some room for improvement. Powersliding with the ferrari-like car is very satisfying and gives me Outrun vibes. I haven't had a single physics bug, but it annoys me a bit the cars severely lack grip at high speeds (150kph+).
I'm not smart enough to guess what's missing (barely made my own raycast car), so I dunno if it's something with tire compound setup or areo or whatever.

The mouse controls and ECS work very well, but I do find it more fun sliding around with a tad less Steering Assistance and doing throttle control. Source code looks very in-depth, too bad I dunno what half the acronyms mean haha. I know you've been working on this model for years, but this is really inspiring.

Side note, does anyone know good forums and research material (books?) for vehicle simulation? I'm a programmer by trade, but my knowledge of mechanics is limited to pre-college physics and casually playing driving sims.

Thanks nate! I appreciate your experience with my engine. 

And well, aerodynamics has not yet been perfected so it may be worked on soon. I will try to make the code coherent in the future so everyone will be more confident on using it for their games too.

As for writing vehicle simulations, Wolfe has listed a lot of them, some of which are what i relied on, but he has his own explanation so I suppose there's no need to scour the internet so much: https://www.gtplanet.net/forum/threads/gdsim-v0-4a-autocross-and-custom-setups.3...