Oh for sure, that's why i'm interested in this speculation, what if a human who would not be sneaked attacked, but could see it coming, a well trained, very strong human, could he possibly subdue a grown chimp. I know their muscle fibers are more compact and explosive, but in comparison to an average human male, some people are 2 times stronger than an average male and have great technique to get good leverage on throws, punches and grappling. No killer teeth though.
now you're getting specific though, again, are we comparing the average chimp to the average human? Or to a well trained athelete? Like a wrestler, iron pumper etc.? I guess a very well trained person who is at his physical optimum could probably beat a chimp, I saw a martial arts expert on TV who was faster then a Cobra, and those animals are considered very fast, but yeah, the guy is very well trained! But I would not be surprised if a chimp is stronger then a human, I mean if you compare the average chimp to the average human, then you could also compare the hercules of chimps to the hercules of humans, and the hercules chimp would still win :p
I am also curious how you actually want to really measure a chimps strength - or any strength, because you can not simply tell the animal that it should use its full strength, like under really heavy stress. So I would take it with a grain of salt. In TV I saw once a zoologist talking about the orangutan they have, they had this ball that would measure the force when you squezed it, and they gave it to the orangutan, I dont remember anymore the force they measured, but it was far beyond anything a human could do to it, just from a what looked like a normal squeze and he said that he believed the ape didnt even used its full strength, he would not be surprised if it could crush a coconut with those hands just like that.
Who knows? Maybe, if a chimp would really go the maximum and his limits he could lift a car! But the real reason he could not make it is because his joints and all that would simply give up and tear apart before he lifts it? You know, like at 5:05 ...
In any case, what ever the real strength of a chimp is, all I know is that I dont want get in a fight with those furr-balls of teeth and paws :p
Also, i think those adrenalin stories are more myth than fact, as there is no way a human body could pull of those feats with just a bigger intake of adrenaline.
It is incredible though what the human body can all do when its either on its limits or when a lot of adrenaline is pumping trough it. Many war time stories involved such feats, heh like that Korean war veteran who was stuned about how some chinese soldiers could still go on and fight even after a 50 call from his machinegun blown off half of their abdomen. I also remember that I have read somewhere that we have actually a kind of fail-save system in our brain which prevents us from using our muscles to their full strength for the simple reason that we dont damage our joints, bones etc. the weak points of our body. However, what happens when this fail save system doesnt work, can be seen when people get certain neurological issues, for example like epilepsy. Even several people can not manage to controll a person that has such spams.