I have my pedals against a piece of wood which is against my subwoofer. It gives me an excellent representation of what the engine is doing. Not so much on the tires. However, some small tranducers, like a small pair of headphones, taken apart and built into two separate bracelets might do the trick. So, a stereo speaker system with a sub woofer, headphone bracelet instead of speakers, a roomate to tell you when it's too loud, and off you go.
Also, I'm kinda thinking an added gauge in the F9 view might be sorta easy. Something fed by the forces view, but not so sproingy. Maybe four little bars that go from green to yellow to red...