I've been waiting to test PCars physics against a RL car. So I decided to give PCars another try today with the Old vs. New DLC pack so that I can try the Yellowbird. Since I do motorsports in 2 cars with a chassis and suspension very nearly identical to the Yellowbird, this is a chassis I know.
And there is still almost ZERO lift-off oversteer. I can do things in the YB in PCars at that I absolutely guarantee you would get you killed - things I don't even do in my RL cars at motorsports events unless I have a huge run-off area for safety, because even though I'm VERY good at lift-off oversteer in these chassis, that one little screw-up could cost me big in the wrong place.
The YB in PCars simply feels NOTHING like it should. I don't know how else to explain it. The balance is all wrong. It refuses to oversteer off-throttle but has a very classic "light-rear-end" FR-style oversteer when you get on throttle too much. I feel nothing of the nimble front-end, nor of the massive rear-grip these cars possess IRL. Honestly, it reminds me a LOT of the crappy physics in GT5 & 6 (in which RR cars or more-or-less completely borked). I'm not a fanboy of any product, period, and even though I like a LOT of things about PCars, it's incredibly disappointing to find out that their simulated physics don't match real-life in this case at all. It's just as wrong as wrong can be.
Very, very disappointed.
(If you want to feel what a real Porsche of that chassis type feels like, try AC, which models it brilliantly, or go clear back to GT4, which actually does a very good job of it also.)
And while I didn't post this on the PCars board, I can post it here: As far as I can now tell, PCars physics are crap, like GT5 and GT6. They've done a very good job of talking the talk and adding some great weather effects and gameplay, but if they can't get something as fundamental and basic as rear-engine physics correct then they either don't know what they are doing or don't have a physics engine capable of doing what it should be doing. Either way, it's a crushing disappointment.
Go play AC, it's got the physics down so good it's scary. (Now all they have to do is wrap a better game around their fantastic physics and FFB.)