Spec 2.0 Physics discussion thread

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Sail IC

Sail IC

1,019
johnkiller2
Let's discuss the Spec 2.0 new Physics and how its different from before.

When you post, please write if you test online or offline. My initial test is Online.

I tested the car from my last championship race. Happens to be a Lexus Petronas tuned at 615PP for Grand Valley Reverse.

First the lap times where much quicker. Then I realized that after the download the tirewear/fuel was turned OFF, so make sure you turn it ON when doing the tests.

The car handled different, not massively different but different. Having done six races with the car I know it very well, and I'm abe to dedect small differencies.

The car was more stable under acceleration, had a little more understeer (or less oversteer), and if anything it felt as more grip was available. In corners where I had to be carefull on the throttle on cold tires I could now accelerate harder immediately.

I did a quick change of set-up, just lowered the rear 2mm (or points) going from 13/1 to 13/-1, and then it felt more balanced, so the ridehight works the same as before. I didn't have time to play with any of the other settings.

When properly retuned, I think I will be able to go a little quicker than before, so there are definitely some changes to the physics, but I haven't had time to test enough yet. The car feels easier to drive, which I'm not sure is a good thing or not.
 
I found online found handeling to be much more responsive, tyres (RS) did not seem to get as hot and there for did not wear down as quickly
 
Only had time to run a little bit offline before work. The cars felt a little looser there, closer to the way they felt online after the last few updates. I'm wondering if PD has finally narrowed the gap between online and offline to the point that we can now tune in one place and have the car perform at similar levels in both modes.

The ability to have up to three separate setups for a car is great. Also having tire wear/fuel consumption in practice will prove useful especially if the offline performance is now a close enough match to online to make it relevant.
 
For me after a quick test, it seems right in the middle, less understeer offline and less oversteer online ,just a little, don't seems necessary to retune anything, perhaps the ride height only for some..... Will check this later more exactly.
 
I tested a handful of cars offline on my favorite tuning track. All tunes were still balanced as before. They did feel more grippy up to a point. What I mean is that the cars felt really good, smoother, right up to the limit. Once you crossed the tire grip capability, the traction was gone. More real life feel in my opinion. My real race car feels alot like that. You feel unstopable when on the limit, but take a small step over the grip limit and you've got your hands full.

For most of my offline tunes, I can see only minor changes to dial into these new grip levels.
 
praiano63
For me after a quick test, it seems right in the middle, less understeer offline and less oversteer online ,just a little, don't seems necessary to retune anything, perhaps the ride height only for some..... Will check this later more exactly.
Click to expand...

Good summary, simple and to the point.

The feel of driving hasn't changed much IMO. I think the people who been very upbeat about the driving experience of Spec 2.0 are probably driving offline where most cars have strong understeer and now there is less.

I'm not sure the online is a step in the right direction. Cars like the GT500 NSX as now easier to drive at hight HP and there is less oversteer but as most cars understeer the tuning will have to even more extreme to correct it. Doing some more test on Petronas I had to be too radical in the tuning to get it to turn reasonably well.
 
Sail IC
Good summary, simple and to the point.

The feel of driving hasn't changed much IMO. I think the people who been very upbeat about the driving experience of Spec 2.0 are probably driving offline where most cars have strong understeer and now there is less.

I'm not sure the online is a step in the right direction. Cars like the GT500 NSX as now easier to drive at hight HP and there is less oversteer but as most cars understeer the tuning will have to even more extreme to correct it. Doing some more test on Petronas I had to be too radical in the tuning to get it to turn reasonably well.
Click to expand...

This is odd because it seems to be completely opposite of what I observed last night; online and in my Toyota MR2 on sports softs. I had the pre 2.0 tune dialed in pretty good I thought, after 2.0 there is a definite increase in oversteer. Nothing that I don't think I won't be able to tune out (might be as simple as a little more rear toe-in) but it's there. I actually somewhat prefer it on corner entry (seems to turn in better) and mid-corner but on exit I have to be much more careful when applying power. Especially on the Karoussel and the fast section that follows to and including the last corner before the straight on the 'ring.

Perhaps the difference lies in drivetrain (FF,FR,AWD,MR,RR).
 
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esoxhntr
This is odd because it seems to be completely opposite of what I observed last night; online and in my Toyota MR2 on sports softs. I had the pre 2.0 tune dialed in pretty good I thought, after 2.0 there is a definite increase in oversteer. Nothing that I don't think I won't be able to tune out (might be as simple as a little more rear toe-in) but it's there. I actually somewhat prefer it on corner entry (seems to turn in better) and mid-corner but on exit I have to be much more careful when applying power. Especially on the Karoussel and the fast section that follows to and including the last corner before the straight on the 'ring.

Perhaps the difference lies in drivetrain (FF,FR,AWD,MR,RR).
Click to expand...

Ive noticed a much greater difference. My tunes are way out of wack. My z4 m has entry oversteer and is tighter on exit while my zr1 is the exact opposite. I'm afraid my tunes might have to be restarted :scared:
 
I'm going to speculate and say that the method you use to balance a car.. (ie. spring rates, dampers, arbs, or even the ride height glitch) will determine the impact spec II has on your tunes.

i often use spring rates/dampers to balance a car, and maybe PD changed something in that logic.. so a person who uses the ride height glitch to balance over/understeer would not see the same effect. (as an example)
 
esoxhntr
I'm going to speculate and say that the method you use to balance a car.. (ie. spring rates, dampers, arbs, or even the ride height glitch) will determine the impact spec II has on your tunes.

i often use spring rates/dampers to balance a car, and maybe PD changed something in that logic.. so a person who uses the ride height glitch to balance over/understeer would not see the same effect. (as an example)
Click to expand...

I think that's the issue. I use even ride height and play with the spring rate/ dampers/ arb. They changed something there pretty good. I also think the has been tweaked as there is something off about that too. It's so frustrating.
 
The cars I drove today, drive still the same (as far as I can remember), but I get a completely different feedback with my wheel. It feels more direct and heavier.
Due to a lack of testing, I can't really say if the laptimes are better now. But it feels a little bit grippier, therefore less oversteering, online than before.
 
dr_slump
The cars I drove today, drive still the same (as far as I can remember), but I get a completely different feedback with my wheel. It feels more direct and heavier.
Due to a lack of testing, I can't really say if the laptimes are better now. But it feels a little bit grippier, therefore less oversteering, online than before.
Click to expand...

What wheel do you use?
 
My personal take so far...
I've been taking a few of the 'wilder' cars around the Nurburgring Nordschleife in offline practice this evening (nothing like jumping back in the deep end!), and something's definitely changed.

However, I've found simply reversing front and rear ride height has made a significant difference - much more like how I remembered the cars previously.

The yellowbird in particular was completely undriveable with the tune I had pre-spec II, but after switching the ride heights I've regularly been 3 seconds per lap quicker than before. There does seem to be a little more grip, I could previously wheelspin easily in 2nd gear, often 3rd, but now 2nd gear is just putting the power down rather well.

Not saying this is all that is needed, there is still something not quite right, but seems to be helping massively for me.

Also (I'm using a DFGT), the steering in general does feel more precise, with what feels like more stability when turning in, and then holding the grip through the turns better.
 
esoxhntr
I'm going to speculate and say that the method you use to balance a car.. (ie. spring rates, dampers, arbs, or even the ride height glitch) will determine the impact spec II has on your tunes.

i often use spring rates/dampers to balance a car, and maybe PD changed something in that logic.. so a person who uses the ride height glitch to balance over/understeer would not see the same effect. (as an example)
Click to expand...

I think you're spot on.

Now we only need to figure what/how it changed
 
something changed, most of my car seam largly unaffected, there different but i can tweek them back. some i like better now like my 02 viper. However what ever they changed made my 427 cobra undriveable. It didn't handle great before but i could drive it. I spent the last 1hr trying to make it right but nothing seams to work. Its all over the place.
 
For dragging, it seems that the "tire temperature" (not sure what's the proper term, for what refers to the color of the tire) has a bigger effect than before on the grip of the tire on launch.

I have not tested this what so ever, but by results experienced, I noticed it.
This was online.

But then again, maybe it's a placebo effect and I'm imagining things o_O
 
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zodicus
something changed, most of my car seam largly unaffected, there different but i can tweek them back. some i like better now like my 02 viper. However what ever they changed made my 427 cobra undriveable. It didn't handle great before but i could drive it. I spent the last 1hr trying to make it right but nothing seams to work. Its all over the place.
Click to expand...

It seems the changes are pretty in depth. I have a feeling it's all in the damping and spring rates and that the new load indicator has something to do with fixing it.
 
yeah that was my felling as well that somthings different about dampers and springs. i didnt notice a "load indicator"?
 
Loving the new physics, I've tested about a dozen cars offline so far and they all feel better than ever. Like people have said, the cars now feel like they have real mass and are easier to drive smoothly without being arcadey. The "ride height glitch" still seems to be there but the effect is much less noticable. At this point I see no need to revise Quick Tune.
 
I'm not sure if it is the new physics or the new support for the G27 wheel, but i could feel a lot more tire information through the wheel than before the update. I was playing around with the recommended cars online with a friend and we both felt they felt quite a bit more communicative regarding what the tire is doing. It was very difficult to tell the difference between slipping and total loss of traction before the update, making it difficult for me to drift with the wheel, but i was having a lot more fun the other night drifting some of the Nissans around Trial Mountain.

But, like i mentioned above, I can't say for sure if it is the wheel update or the physics update. Either way i'm happy with this aspect of the update :)
 
Dont know if this is the right thread but I'm in an online lobby now at Toscana tarmac and it is raining. Only thing is the car is handling like it is on a dry track. :S
 
I also think the karts online react a little less when you ride a curb, as you can now get 2 wheels over the curb to find the grip as before you used to bounce up into the air uncontrollably.
 
Jackthalad
Dont know if this is the right thread but I'm in an online lobby now at Toscana tarmac and it is raining. Only thing is the car is handling like it is on a dry track. :S
Click to expand...

I always knew that the four "tires load indicators" that for me looks more like 4 drums, are in fact tires dryers :crazy::crazy::dunce:
This is not a bug !!!
 

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