You are correct, the autoplay is indeed broken, I'll have to have a look at that. This will be fixed in the next mod update which will fix some other bugs as well
The answer is always... *activates red orange white pink purple power* RED ORANGE WHITE PINK PURPLE!!!!!!!!
sadly I was still off by an order of magnitude (lightspeed is like, 671 million mph iirc) but sadly the JATOs ran out of fuel.
went to negative earth after I hit about 1500 mph, no suspension at all, had to get it airborne, twisting, and facing up
I think a big part of it was me fucking with all the drag settings, turned it all down as low as possible.
I'm on zero gravity with wind at 470 mph, car is at 462. There is still some semblance of air resistance, which doesn't make much sense at all. (wind also doesn't make sense)
oh my god, I didn't even mess with the wind, if you get it right you could very well be going way faster than me.
Wind is only 470 mph maximum, you can not go any faster than that if just wind. (Unless you edit the app, which would be absolutely nuts)