In 2003 Geoff Crammond started the work on a sequel called Stunt Car Racer Pro, but after a long time without any news about the project, it was officially canned in February 2005.
Although it was almost a decade old at the time, Stunt Track Racer was remembered and mentioned as a comparison in CDMAG's review of Whiplash.
Even with it's (simple) 3D graphics and physics model, Stunt Track Racer runs at a decent clip on a 4.77MHz machine with CGA, and full speed on any machine 8MHz or faster. Extremely well-optimized programming!
While the CGA version of the game didn't do any speed checking and runs too fast on modern hardware, the EGA version was throttled by the EGA page-flipping, and runs perfectly on modern hardware.