I've been around drag racing a long time. Always wondered what would be the limit as to how fast these cars could go. Tires seem to be the limiting factor now (not to mention shut down area). But I have a feeling that if you could run "unlimited", it would come down to how many G forces the human body could take. If a car could run 2.9 and 400 in the 1/4 mile, how hard would it be to steer it and how many G forces would you have to endure? Can you see a G force suit like fighter pilots wear when driving a dragster or funny car?
I'm not an aerospace physiologist and I didn't stay in a Holiday Inn Express last night so I don't claim to be an expert on the subject... but what I do know is that he G forces a fighter pilot feels in combat are somewhat different than the G forces experienced by Top Fuel & Funny Car drivers.
The biggest difference, and the reason fighter pilots require G-suits, is the fact that in a fighter aircraft when pulling G's the blood wants to leave the head & upper body entirely. We can all agree that's a bad thing. The G-Suit squeezes the legs, beginning at the calves and working up, to force the blood to remain in the upper body area. (Note: the Blue Angels DO NOT wear G-Suits for their show - they are truly bad ass!) TF/FC drivers experience lateral G's, so the blood remains in the head and upper body, it just rushes to the back of the skull. I'm not suggesting either is easier or more difficult, I'm merely pointing out the differences.
I can say that I have been shot off the front of an aircraft carrier at least a dozen times and it's a rush. I've only done it in the C-2 and all passengers face the back of the aircraft so all your weight gets thrown into the belts as opposed to being crunched into the seat. Your arms and legs, if not secured to or against something (you generally put your legs up against the seat in front of you and cross your arms and hold onto the shoulder straps), will flail helplessly outward until you clear the flight deck, at which time there's a three or four second period of near weightlessness as the propellers catch up to the end speed of the aircraft. The arrested landing in the C-2 is the exact opposite as you slow from a little over 115 M.P.H. to zero in less than 600'... and you do get crushed into the seat pretty well. I greyed-out in a T-34 once back in the late 80's when I used to fly with the maintenance pilots who had empty back seats and it was a very unique experience. Essentially, enough blood left my head that I lost vision - everything was grey, but I retained all my other senses so I could hear, speak and feel the weight of the G's against my body until we came out of the maneuver. Not the same as a G-lock though, which I'm sure can be found on YouTube. It's essentially a form of cerebral hypoxia (lack of blood to the brain) and when that happens all consciousness is lost... and that's obviously very bad. If you're interested look for videos of celebrities flying w/ any of the jet demonstration teams, I'm sure there's an example somewhere. But I never experienced anything even resembling that with the lateral G's of a cat shot or an arrested landing.
Anyway, I say all that to say that whereas I agree the machine will be able to withstand more than the human driving (or flying ) it, I don't think the fuel cars are in any danger of going so fast (regulated or not) as to make them undriveable from a G-Force perspective.