That is the top fuel WORLD record 1/4 of 4.4 seconds which equals to 4.3gs however most dragsters will not be achieving such times.
Back to the main point, no road car is ever going to do 0 to 100kph in under 1 second. Nor is there any point, such acceleration would provide g forces most people cant handle.
Nor is the car going to do 600kph.
Drag equation. (assumptions, 1.8x1.6 meter front of the car. 0.25 coefficient of drag [low], same car)
Drag forces at 600kph.
((1.225 * (166.7^2))/2) * 0.25 * 2.88 = 12,254 Newtons of force required.
Drag forces at 400kph.
((1.225 * (111.1^2))/2) * 0.25 * 2.88 = 5,443 Newtons of force required.
So that is a 125% increase in drag forces whilst only increasing speed by 50%.
I highly doubt they ll crack the 500kph barrier.