Extreme understeer at hairpins with G29

25
England
England
bengolding94
Hey everyone,

Hopefully it's alright to create this thread - I couldn't see a similar one. I've recently been experiencing dramatic understeer at tight corners such as the hairpins at Deep Forest and Tsukuba when racing on my G29 and was wondering if anyone else had experienced anything similar. It seems pretty unpredictable, ranging from barely noticeable on some laps to costing seconds a lap per corner on others, and I can't figure out the cause. When I pick up the controller, everything seems just fine. I'm confident that it isn't just down to worn tyres, carrying too much speed, missing braking points or just not turning the wheel enough. Either I've suddenly started driving differently without noticing, there's something strange going on with the physics engine that I'm missing, or there's some kind of calibration issue with my wheel at high lock. It's as if there's some artificial limitation on the amount of steering lock I can apply, and that this limitation varies lap to lap. I've added a couple of example clips demonstrating this.



First, this one at Tsukuba, I'm driving a completely stock Nismo 400r (on racing tyres) and was the only person in the room experiencing this understeer. It came on suddenly partway through the race and persisted until I switched to using a controller, at which point it disappeared entirely and I stopped losing 3-6 seconds a lap. The clip shows the difference in the angle of the in-game steering wheel between wheel and controller inputs. On controller I get substantially more lock and can turn as expected.


Secondly at Deep Forest. I'm running an untuned (BoP) AMG GT3 '20. The first time encountering the hairpin I'm met with massive understeer. A few laps later, still on the wheel and with more worn tyres, I make the corner at a similar speed without issue. I don't have dead/dirty tyres, car damage, etc. so I'm at a loss to explain it.

If anyone else has experienced similar or has any theories on what might be going on I'd love to hear.

The closest I've seen to an explanation is that the front wheels could be restricted by the wheel housing due to the ride height being too low or there being too much suspension dive under braking. I'm not particularly convinced by this though as a) I'm running the cars completely stock and b) the understeer persists when fully off the brakes.

If any of the kind folk on here have any thoughts, I'd be grateful to hear them!
 
If anyone else has experienced similar or has any theories on what might be going on I'd love to hear.
Usually it is a problem of ride height lowered too much, though a few cars will have this issue in stock form (I think the Amuse S2000 for example does). I certianly would be surprised when any Gr. car is affected, but then again I wouldnt be surprised after at the same time.

Why does it happen on lap 1 and not on lap 2?
Possible for the small change you are doing in turning in later.
Just a propability, and from past experience the most likely explanation.
 
Hey everyone,

Hopefully it's alright to create this thread - I couldn't see a similar one. I've recently been experiencing dramatic understeer at tight corners such as the hairpins at Deep Forest and Tsukuba when racing on my G29 and was wondering if anyone else had experienced anything similar. It seems pretty unpredictable, ranging from barely noticeable on some laps to costing seconds a lap per corner on others, and I can't figure out the cause. When I pick up the controller, everything seems just fine. I'm confident that it isn't just down to worn tyres, carrying too much speed, missing braking points or just not turning the wheel enough. Either I've suddenly started driving differently without noticing, there's something strange going on with the physics engine that I'm missing, or there's some kind of calibration issue with my wheel at high lock. It's as if there's some artificial limitation on the amount of steering lock I can apply, and that this limitation varies lap to lap. I've added a couple of example clips demonstrating this.



First, this one at Tsukuba, I'm driving a completely stock Nismo 400r (on racing tyres) and was the only person in the room experiencing this understeer. It came on suddenly partway through the race and persisted until I switched to using a controller, at which point it disappeared entirely and I stopped losing 3-6 seconds a lap. The clip shows the difference in the angle of the in-game steering wheel between wheel and controller inputs. On controller I get substantially more lock and can turn as expected.


Secondly at Deep Forest. I'm running an untuned (BoP) AMG GT3 '20. The first time encountering the hairpin I'm met with massive understeer. A few laps later, still on the wheel and with more worn tyres, I make the corner at a similar speed without issue. I don't have dead/dirty tyres, car damage, etc. so I'm at a loss to explain it.

If anyone else has experienced similar or has any theories on what might be going on I'd love to hear.

The closest I've seen to an explanation is that the front wheels could be restricted by the wheel housing due to the ride height being too low or there being too much suspension dive under braking. I'm not particularly convinced by this though as a) I'm running the cars completely stock and b) the understeer persists when fully off the brakes.

If any of the kind folk on here have any thoughts, I'd be grateful to hear them!

The angle of the wheel in cockpit view should match your G29. If it doesn't then probably a wheel issue, it's telling the game the wrong steering angle.

In the first Tsukuba clip the wheel isn't being turned enough, it gets to about 100 degrees maximum.

In the second Tsukuba clip (the pad clip?) it goes to nearly 180.
 
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In the first Tsukuba clip the wheel isn't being turned enough, it gets to about 100 degrees maximum.
?

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Thanks for the inputs guys. It's a fair point that a bopped Gr3 car would be the last you might expect to see an issue with given their popularity - if it were a game issue you'd think more people would be complaining that the stock tune needed tweaking. It's likely either me or the wheel.


Fair point about the red dot, too. I've always thought that turning more once you've reached that limit was a bit pointless - I think it's meant to give you an idea of how much of the available lateral grip you're using after all.

It does show that I'm trying to turn fully whether I'm understeering wide or not, so I suppose the game is registering my input properly. I'll do some more testing at some point and see whether there's a disconnect between the angle I'm inputting with my wheel Vs what the in-game wheel shows.

Appreciate the input, all!
 
One thing to remember is that it takes time for the camera to bring exits in to view so it’s natural to over turn the wheel, trying to see the exit early.

Going a fraction slower and matching the wheel turning to the view can help you get better at timing and co-ordinating the two.

The optimum is that you minimise how much you actually turn the wheel, there are a couple of exceptions to this but they are more control techniques than getting smooth fast cornering.

Edit:

Watching the cockpit cam replay back again you are so so so late on the brakes I’m surprised the car (and gear box) made that in the end.

It’s not 1 for 1 but this is a lap of Watkins VR view which will look like cockpit.

You’ll notice a couple of things, my braking is earlier but smoother to optimise turn in or exit, also I brake in a way that isn’t just banging down the gears, braking, turning and accelerations are phases, trying to do them all really quickly or at the same time is “trick” and sub optimum.

 
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Skinny McLean - Hadn't noticed the red dot maxed out at 90 degrees before - that's good to know, thanks.

Newmedia_dev thanks for the video - that's a great, clean lap for sure. Everything's calm and considered, and clearly it's working well!

The Tsukuba clip especially doesn't show the best driving, and I agree that earlier braking and smoother inputs would've been better, but it's definitely more than that unfortunately. I did another run of 20-odd laps at Deep Forest last night, deliberately turning the wheel to full lock at the hairpin, and only about 60% of the time did the in-car wheel matched my input. The remaining laps showed the wheel response becoming very lazy, maxing out at anywhere between 70 and 100 degrees of rotation. I've done a bit of digging online and supposedly the optical sensor inside the wheel which relays steering angle can come loose or be affected by dust etc., and I'm guessing it's related to that. I've had the wheel decide to recalibrate randomly during a race a few times over the past couple of months, which now I stop and think about it, is probably related too. Maybe after 6 years it's finally time for an upgrade!
 
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