Yep, but same time they adjust their part of physics fit better experience, tuning their cars, adding more grip/power, adjusting tire pressures etc, just to defeat sharpest edge of real world physics.
So even real world physics are giving different reactions to same car, there's no identical cars in real world, neither identical setups used in any races, always there's at least minimal tolerance differences and those are enough to start butterfly effect in real world physics, giving way different result of handling. Of course main physics directions are there and had to obey, but actual result may vary a lot, even one when pressure 1psi lower than others may cause car to spin counterclockwise instead of all "identical" pressures would spin it clockwise.
Discussion should be stay much higher on physics base, if taking videos to compare you end up always situations where you just don't know all variables and it's not enough to start claim at car should do something instead of doing this and that, if driver makes minimalistic driving input (pedals/wheel) it might change whole case upside down and still everything is going exactly in terms of real-world physics, this is case in real-life and in simulation. When you deal with really good physics engine you might find lot of cases which look truly unbelievable/unrealistic from captured videos, only person who can judge those situations is driver behind wheel, if driver knows physics well and has more than good senses and highly trained reactions and ability to "record" every input/reaction what he did then he can give nearly satisfied explanation how realistic or just good car/simulation worked.
Small example: 4wd car in snow, few millimeter lift on throttle and you can get it oversteer, few millimeter push on throttle with followed correct few millimeter steering move and again you get it oversteer and also one choice to clue front wheels by applying feather touch on brakes and just after in to overdrive, or just correct timing on wheel turns will float your mass to side and you're oversteering. But this is working only if you're running right tire pressures, there's trick how pressures should be to give you easy oversteer. And if you search videos or comments how/why/when 4wd is oversteering you'll find lot of different things, and if you stick on one or maybe two of those cases and clue them to law of physics then other cases became impossible, but just because there's small differences what you have to take in count, but that's just nearly impossible thru second or third person explanations.
My friend said different opinion to this, can't argue when he said at that tastes just cold with tiny bit of salt. He has "damaged" taste nerves, and he's taste feelings are way different than "most of us".
Fact is just thing where majority of people have decided to believe, example: you might say at diamonds are one of hardest materials in world, but I can say at those are really soft. I'm right and you're wrong. Proof: take imaginary 1km (irrelevant how long, but helps to understand) long diamond and knock on other end and listen on other end, sound will come thru, bending diamond to deliver it's sound waves thru it. So just jelly to me, even light travels thru it, so black thick paper has to be harder..
I'm moving this here as it has no placxe in the GTS physics thread.
No, but seems like I'm only one with understanding of physics, car geometry and good senses.
Physics: You are unaware of the basics, that much is clear given you had no idea how sound waves travel through substances in different states.
Physics: Excellent, then you will have no problem explaining exactly what difference to PMI and roll centres your changes below have made, be sure to include all required calculations and the resulting diagrams.
Good sense: Your good sense is a form of logic that means the Toot Fairy and Santa are real because enough people believe in them. Physical existence based on a number of people believing in something is as far from good sense as you can get.
I have understanding at all you have Assetto Corsa and Porsche pack which contains gt3 cup Porsche? If yes then go and try following setup on Brands Hatch GP, without any aids, this includes use of ABS, noABS during testing. Only aids to use is auto-blip and tyre blankets.
Stock brake bias 62
Stock fuel 30
Aero 10
Slick hard (H) tires
Front pressure 15psi
Rear pressure 16psi
Front camber -2.8°
Rear camber -3.6°
Front toe 49
Rear toe 11
Front height 6
Rear height 12
Front ARB 12
Rear ARB 8
Now before we look at this I would like a quick reminder of your original claim:
"So even real world physics are giving different reactions to same car, there's no identical cars in real world, neither identical setups used in any races, always there's at least minimal tolerance differences and those are enough to start butterfly effect in real world physics, giving way different result of handling. Of course main physics directions are there and had to obey, but actual result may vary a lot, even one when pressure 1psi lower than others may cause car to spin counterclockwise instead of all "identical" pressures would spin it clockwise."
You seem to be implying one change, and yet you have made multiple changes before even starting.
However tonight I am more than happy to give this a go, and I would encourage as many people as possiable to do the same.
Try the car in its stock set-up, try it as above and then change the tyre pressures. Let us know your thoughts on it, with videos if you are able.
Above give you classic understeery on throttle and oversteer on lift-off.
You don't need to change the set-up to get that.
Then reduce 1psi from rear pressures, to 15psi equal on front and rear and car changes it behaviour to way different, someone said at understeer is just thing what you can't tune out from Porsche, well you can modify car behaviour with tune a lot, if you try hard (really super smooth trying) you might get it understeer.
Is physics now broken or why this happens? I'm just saying at this happens also on real-life and one psi makes difference.
Oh, you must try what happens if all but one tire is 15psi and that one has 16psi.. LOL
Hold on. Lets rewind and look what you said again:
"So even real world physics are giving different reactions to same car, there's no identical cars in real world, neither identical setups used in any races, always there's at least minimal tolerance differences and those are enough to start butterfly effect in real world physics, giving way different result of handling. Of course main physics directions are there and had to obey, but actual result may vary a lot,
even one when pressure 1psi lower than others may cause car to spin counterclockwise instead of all "identical" pressures would spin it clockwise."
Are you now saying that this change will not cause the directional yaw of the car to change when its the only variable?
That changing the rear pressure (and increasing grip at that end by reducing it) is just going to trim understeer rather than cause it to break the laws of physics?
You seem to have moved the goal posts a rather massive distance here.
However you still need to explain this bit:
even one when pressure 1psi lower than others may cause car to spin counterclockwise instead of all "identical" pressures would spin it clockwise."
Now given that you have stated that you know more about this that anyone else, please explain how (all other factors being equal) a car that has is turning right and oversteers to such a degree (clockwise spin) with all the rotational force heading in that direction around the point of yaw; would suddenly spin anticlockwise should one tyre pressure have been 1psi different?
How does it manage to overcome every bit of the clockwise rotation force around the point if yaw and reverse direction, changing the entire loading of the car?
What you have claimed would happen in reality would break the fundamental laws of physics!
As such being able to prove this would be Nobel level material, so post your calculations up here and you could be on your way to a $1,000,000.
) a few silver and a few bronze 
to those who have got em all.
and 
