After a bit of time researching,the fastest possible time there could theoretically be would be around 4.5xx-4.6xx as the time from dying to the start of the end screen animation where the revs and boost thing start to go away thing is approx 4 seconds and then from that point to the first frame of the photo part of the end screen is approx half a second.
So if theoretically you die pretty much instantly then a time around this 4.5x-4.6x region could be possible.
Also if someone manages to skip the animation of the photo then a ls5 (lower sub 5) could be possible. Also,if you somehow manage to skip the wait for the animation to start the photo extremely early and include everything else then a sub 1 coukd be done but a way to do this looks impossible but im sure there will be someone who does this soon.
Honestly, I think you are the only one who puts that much work into the category.
Because no one has really done that and I dont see anyone else here doing it and also I really want to snag an unbelievable time before youtuber Summoning Salt makes a video about the speedrun wr progression
NEW UPDATE ON THIS TOPIC!!!!
I have decided,because of me getting 2 nearly impossible times, that I would research on this topic again and I have gotten more accurate times for this.
Start of the run to dying:0.9/1.0s~(results on different maps will vary by minor differences and some will be away from the time stated) From death to start of animation:3.9/4s(this will not vary but exact time is not exactly know but is near enough this) Animation:0.5s
I have theorized a glitch where you clip into the ground somehow and get launched thousands of metres down the maps and skipping the death sequence except from spawning and dropping down but not only do I doubt that this will ever be pulled off but I doubt that even a TAS bot could even get close to this shit.
For your post are you sure that summoning salt will make a video?
While that is a possibility in the future I doubt he will make a video on such a small speedrunning community as this lol and also the reason I started doing more research into the game is because I was inspired by my 5 flat and sub 5 that I did earlier this week but if he does make a video about the speedruns on this game then I do want to say that he is one of the people who made me get into the speedrunning scene and get me to dominate the death% leaderboards
So remember when i said that i wonder if theres a glitch to clip into the ground. Well i can confirm that it is possible with these videos i have found made between 1 week and 2 months ago even tho they are not much i believe that something could be done with this
New Level: Mega Highway
New Level: Mega desert
Various bug fixes
Have fun with the new maps y'all!