I think that is due to the game for some reason applying throttle (When off throttle) when turning in which is what probably is losing the rear traction on slow corners and oversteers and the opposite on high speed corners. I think that is why it is hard to do Pouhon as it applies throttle when you lift and makes you understeer wide.
I've shortened the quote to make it easier to read 👍
Clearly you're really fast on GT5... congrats on the 39, that's a great time
This reaction is feasible with the FGT as it does some strange things... sometimes it seems to hold a rev level when you lift off, sometimes not... noticable if you just lift off, not if you just touch the brakes 1st... it's sort of a built in driver assist I think... possibly to limit lift off oversteer. It irritates the hell out of me!
But the thing that makes me say it's a physics engine issue if it's there on regular road cars too.
You could see it clearly in the fastest laps in the Academy final round... how the Z was rotating as people came OFF the brakes. And I was pottering round the Ring in a M3CSL this weekend on comfort softs, and that did it too.
I know it's the fastest way to lap in GT5, but it just feels totally unrealistic and wrong to me.
I think the kerb you are on about, you can run wide and onto something like artificial grass along with I think some elevation change on that part of track which is what might pull the car to the left. The kerb is quite big so it is not much of a problem if you stay within the confines although it can be easy to be too greedy

.
I know the 'astroturf' section you're talking about, but it's not that, it's the way the car behaves with 2 wheels on the track, and 2 on the rumble, or when all 4 are just on the rumble... outside is 100% no-go!
Trail breaking. I see a discussion about it. I definitely feel oversteer when slowly lifting of the brake while turning in approaching the apex. That's also what i prefer. With FR cars you can create it with a higher BB on the rear than the front (4/6 for example), This will help you kicking out the back a bit, just before the apex. But you need to control the brake pedal gentle at the end of the braking zone. Lifting of the brake too much and too fast can cost you dearly.
Yes, that's the feeling. But as I say, that's not how cars handle in real life.
The tendancy of a car to oversteer whilst trail braking decreases as you reduce brake pressure. The natural reaction of a car lifting off the brakes sharply whilst turning in would be understeer.
Most of the MR cars have it naturally and have this to the extreme, when your completely of the throttle. Leaving a bit throttle on will degrease it.
Spot on 👍
And again, shows up another 'hole' in the physics engine that's been there since GT5P... in cars with a high tendancy to oversteer when off the gas or braking whilst turning (NSX, Lotus Elise,GT40LM), you could keep a bit of throttle applied whilst trail braking to control the oversteer. It's less evident in GT5 as all the cars generally understeer so much, but it's still there... in real life, you might be able to balance a FF car like that, but you can't balance a MR car like that.
Still, I don't mind this as much as I've pretty much always used trail braking in real life and this feels easier to adapt to for me than how GT5 currently feels.
I hate FF and AWD cars and almost never drive them. Also not a big fan of MR cars by the way.
Again 👍
Handling of FF and AWD cars is properly screwed up, but always has been in previous versions of the game. I almost never drive AWD cars and never drive FF cars... they just feel completely wrong to me.
EDIT
The brake release = oversteer thing reminds me very much of the way ride height is screwed front to back in the game... I sometimes wonder if there's just one big assumption error in how they programmed weight transfer in the game code and this is screwing up the whole engine. Whatever it is, I've never felt the way cars handle in GT5 has been right.