Car Behavior and Tire Temps after Patch 2.0PS4

[NLxAROSA]

I got banned from the PCARS forum in week 1

This is a thread about tire temps in 2.0....what's wrong with posting my experiences? I'm hoping others will do the same, so that together we can come to some sort of understanding of when and where to use the different compounds.

Nothing wrong with pstong your experiences, I just think you'll get answers sooner over there than here, because that's where the people that know this hang out. 👍

I can give it a few laps in varying temps with each tyre, see how it goes (PC/G27). Are you in career or just private testing?

 

[Jack Dulmage]

I have found that multiplayer works fine, but Career is terrible... the feeling of the car is completely different...

 

[twitcher]

Nothing wrong with pstong your experiences, I just think you'll get answers sooner over there than here, because that's where the people that know this hang out. 👍

I can give it a few laps in varying temps with each tyre, see how it goes (PC/G27). Are you in career or just private testing?

It's more online I have the issues.

The last one specifically was the NISMO GT3 at Zolder, in the fall, mid day, ambient 23C, track 31C. I don't remember the specific date, it wasn't my lobby.

With the hard tires, I had the front set to 1.66bar and the rear set to 1.61bar.

In the quali session before he race, I tried the soft tires, and instantly had them up to temp after the out lap. By the end of my flying map, everything but the front right was in the mid 90s...and I was being a bit conservative on the flying lap. This is what led me to go with the hard tires for the race...I figured I wouldn't be able to keep the softs below 100C for the whole race.

 

[ozwheels]

It's more online I have the issues.

The last one specifically was the NISMO GT3 at Zolder, in the fall, mid day, ambient 23C, track 31C. I don't remember the specific date, it wasn't my lobby.

With the hard tires, I had the front set to 1.66bar and the rear set to 1.61bar.

In the quali session before he race, I tried the soft tires, and instantly had them up to temp after the out lap. By the end of my flying map, everything but the front right was in the mid 90s...and I was being a bit conservative on the flying lap. This is what led me to go with the hard tires for the race...I figured I wouldn't be able to keep the softs below 100C for the whole race.

I realize I’m a broken record by now, but more people need to be aware of what you just perfectly described. Softs overheat when you are forced to use them in cool/cold conditions.

 

[twitcher]

I realize I’m a broken record by now, but more people need to be aware of what you just perfectly described. Softs overheat when you are forced to use them in cool/cold conditions.

I just set up a private test at Zolder, NISMO GTR GT3, ambient is 22C, track is 27C, medium cloud, in the fall, can't see the date anywhere...

I ran one 7 lap test on the soft tires, and by lap 5, I had to start to be really careful, especially on corner exit. I increased the pressures to 1.76 front and rear, and did another 7 laps. In the second session, I was able to keep the fronts about 80-85C, same with the right rear. The only problem corner was the left rear, which was heating up to about 95C. I have to say, I was pleasantly surprised by all this - I figure with some asymmetrical pressure tuning, maybe some camber adjustments, I can get the pressures and temps of the softs to hold steady, at least for a sprint race.

As I'm writing this, the track temp is going up, it's now at 30C, so I'm going to head out again, see what I get.

So far, I've been lapping in the 1:35s, with my best lap, a 1:34.846, coming in the second outing.

This is clearing up a lot for me, as after reading the start of this thread, I was under the impression that the softs were only supposed to be used for really cold conditions, like you'd see at a "winter test", but that doesn't seem to be the case. 26C ambient and 30C track is summer in some places lol.

I really just want to figure out roughly what the upper range of the soft is, so I know which one to select based on track temp and length of race for online racing.

 

[McKiernan]

26C ambient and 30C track is summer in some places lol.

Sorry for the off topic but where I'm from 26 deg c ambient is virtually a heatwave where gingers like head me straight for the safety of the pub

 

[ozwheels]

I just set up a private test at Zolder, NISMO GTR GT3, ambient is 22C, track is 27C, medium cloud, in the fall, can't see the date anywhere...

I ran one 7 lap test on the soft tires, and by lap 5, I had to start to be really careful, especially on corner exit. I increased the pressures to 1.76 front and rear, and did another 7 laps. In the second session, I was able to keep the fronts about 80-85C, same with the right rear. The only problem corner was the left rear, which was heating up to about 95C. I have to say, I was pleasantly surprised by all this - I figure with some asymmetrical pressure tuning, maybe some camber adjustments, I can get the pressures and temps of the softs to hold steady, at least for a sprint race.

As I'm writing this, the track temp is going up, it's now at 30C, so I'm going to head out again, see what I get.

So far, I've been lapping in the 1:35s, with my best lap, a 1:34.846, coming in the second outing.

This is clearing up a lot for me, as after reading the start of this thread, I was under the impression that the softs were only supposed to be used for really cold conditions, like you'd see at a "winter test", but that doesn't seem to be the case. 26C ambient and 30C track is summer in some places lol.

I really just want to figure out roughly what the upper range of the soft is, so I know which one to select based on track temp and length of race for online racing.

I’m not too familiar with tire temps at Zolder but knowing the track a little, I think it’s on the lower end of the tire wear scale. I’d be interested to see what you get when testing at Silverstone, Watkins Glen, etc. with similar conditions.

 

[twitcher]

Just did some more testing. With the track temp at 30C, I could only get about 3 laps out of the softs before keeping the temps in check, and the car on the road, became a chore.

I switched to the Hard tires, track temp still at 30C. It took me about 3 laps to get the Hards to above 80C, but once there, they held steady in the mid 80s. I was about 2 seconds per lap slower than my best time on the softs.

I boxed, and lowered the pressures a bit, went afk a bit, came back and went out on track. I didn't notice until half way through the run, but the track temp had dropped to 25C. I struggled to get the tires up to temp, then I realized the temp had dropped.

So, I'm kind of inclined to believe that the softs can work on track temps as high as the mid 20s, after which, the Hards take over for any kind of extended running. I feel like even up to 30C, the softs are still good for a flying lap in quali, especially if you only have time for 1 warmup/out lap.

I’m not too familiar with tire temps at Zolder but knowing the track a little, I think it’s on the lower end of the tire wear scale. I’d be interested to see what you get when testing at Silverstone, Watkins Glen, etc. with similar conditions.

I think Zolder is kind of average on tire wear...it's not the worst, but it does have a number of longer duration corners. It's really easy to get lots of undetsteer through the sweepers, which if you tune it out, makes the car more prone to wheel spin exiting the slow corners.

I'll try somewhere high load next...Silverstone, or maybe Algarve.

 

[NLxAROSA]

Gave the RS.01 GT3 a set of laps at Brands Hatch, 23C/31 track temp. Default setup, racing softs, I'm able to go beyond 100C in a lap or two. Hard tires go to 80-85 (not all wheels heat up equally because setup needs to be tuned to this track). So I think pretty similar to your results.

Also ran a test at 6C. Hard to keep temps in the tyres when using hards period (50-60 depending on wheel). Softs are the only way to go then.

 

[twitcher]

Just ran another test. Same car, same setup, NISMO GTR GT3. April 27, 2pm, Silverstone, Light Cloud, 15C ambient, 25C track.

I ran the soft tires first. 1.78bar in the front, 1.76bar in the rear. They were up to temp after a lap and a half.

If I drove within myself and the limit of the tire, I could keep 3 of them in the 80s - front right in the low 80s, front left and rear right in the mid to high 80s. The left rear was the problem tire, but if I just focused on net getting wheelspin on the right handed traction zones, I could keep it in the high 80s, peaking in the low 90s in some places before cooling back to 88 or 89. The 4 tires ranged from 31psi on the front right, to 33psi on the rears. These pressures held steady after about lap 3.

The only spot on the track that really gave me any issue was the very last corner - I had to be very smooth, careful not to abuse the tires here. Otherwise, I could keep a nice rhythm, even recording green sectors towards the end of the run. After 9 laps, I spun and damaged the car from looking at the HUD too closely All 4 tires had about 3/4 life left in them. There was a noticeable drop in grip as the tires wore, but nothing unexpected.

For the 9 laps, I was able to do 2:06s consistently, fastest being a 2:06.0xx (I restarted the session, I forget the exact number).


Next, I tried the Hard tires. Like I said, I restarted the session, so same temps, same amount of rubber on the track.

The car was a mess. I tried 3 separate 5 lap runs, lowering the pressures with each successive run. The first run was hopeless, all but the left rear were almost blue after 5 laps.

By the 3rd run, I've ended up at 1.55bar in the front, 1.54bar in the rear. By the end of 5 laps, they're in the low 80s, save for the front right. However, even once they are up to temp, they're still only at 27/28psi.

The fastest lap I managed was a 2:07.757, and it was knife edge stuff. Even trying to drive cautiously, I was getting oversteer almost every time I lifted off the brakes, and every time I touched the throttle. Even brushing the throttle in 5th gear through Copps was causing the rear to brake loose.


So, my personal conclusion is that 25C is too cold for the Hards, even at a high energy circuit like Silverstone.

I'm going to do more testing, try a few different tracks, different temps, and see if I can't narrow the window on where the crossover from Soft to Hard is. Obviously it will vary from track to track, so it's going to take some time to figure it out. It's pretty clear to me though, if the GT3 Soft tires are working in a wider range than perhaps they're meant to.

 

[ozwheels]

Just ran another test. Same car, same setup, NISMO GTR GT3. April 27, 2pm, Silverstone, Light Cloud, 15C ambient, 25C track.

I ran the soft tires first. 1.78bar in the front, 1.76bar in the rear. They were up to temp after a lap and a half.

If I drove within myself and the limit of the tire, I could keep 3 of them in the 80s - front right in the low 80s, front left and rear right in the mid to high 80s. The left rear was the problem tire, but if I just focused on net getting wheelspin on the right handed traction zones, I could keep it in the high 80s, peaking in the low 90s in some places before cooling back to 88 or 89. The 4 tires ranged from 31psi on the front right, to 33psi on the rears. These pressures held steady after about lap 3.

The only spot on the track that really gave me any issue was the very last corner - I had to be very smooth, careful not to abuse the tires here. Otherwise, I could keep a nice rhythm, even recording green sectors towards the end of the run. After 9 laps, I spun and damaged the car from looking at the HUD too closely All 4 tires had about 3/4 life left in them. There was a noticeable drop in grip as the tires wore, but nothing unexpected.

For the 9 laps, I was able to do 2:06s consistently, fastest being a 2:06.0xx (I restarted the session, I forget the exact number).


Next, I tried the Hard tires. Like I said, I restarted the session, so same temps, same amount of rubber on the track.

The car was a mess. I tried 3 separate 5 lap runs, lowering the pressures with each successive run. The first run was hopeless, all but the left rear were almost blue after 5 laps.

By the 3rd run, I've ended up at 1.55bar in the front, 1.54bar in the rear. By the end of 5 laps, they're in the low 80s, save for the front right. However, even once they are up to temp, they're still only at 27/28psi.

The fastest lap I managed was a 2:07.757, and it was knife edge stuff. Even trying to drive cautiously, I was getting oversteer almost every time I lifted off the brakes, and every time I touched the throttle. Even brushing the throttle in 5th gear through Copps was causing the rear to brake loose.


So, my personal conclusion is that 25C is too cold for the Hards, even at a high energy circuit like Silverstone.

I'm going to do more testing, try a few different tracks, different temps, and see if I can't narrow the window on where the crossover from Soft to Hard is. Obviously it will vary from track to track, so it's going to take some time to figure it out. It's pretty clear to me though, if the GT3 Soft tires are working in a wider range than perhaps they're meant to.

I see our problem now. When my league tested at Silverstone we were doing 2:00-2:01. Those extra few seconds put a lot more heat into the tires. I think it’s pretty unreasonable to have to drive 5 seconds off pace to make softs stay in the 175F range.

 

[twitcher]

I see our problem now. When my league tested at Silverstone we were doing 2:00-2:01. Those extra few seconds put a lot more heat into the tires. I think it’s pretty unreasonable to have to drive 5 seconds off pace to make softs stay in the 175F range.

I can go a lot faster lol. I was running a high DF setup that I copied over from Zolder. Also had quite a lot of fuel onboard. I also didn't do asymmetrical tire pressures. It was very.basic.

I can definitely see doing a 2:00 on softs in cooler conditions, say 20C or lower, but not for more than 2-3 laps. I've come to realize that the soft tire can't be pushed 100%, lap after lap. It's good for a couple quali laps, but then you have to back off, or risk melting them. Thinking of F1 lap times, it's not unheard of for race laps to be several seconds off quali laps, on the same tire. And it's not because the drivers can't push, it's that they know if they do, they will kill the lonngevity of the tire.

I do agree that the tires have issues, and there is a range of temps in the middle where neither the Hard or soft seems much good, but at the same time, it's tough to imagine conditions where you could lap Silverstone in the 2:00 range consistently, on soft tires, and not destroy them after a few laps.

 

[ozwheels]

I can go a lot faster lol. I was running a high DF setup that I copied over from Zolder. Also had quite a lot of fuel onboard. I also didn't do asymmetrical tire pressures. It was very.basic.

I can definitely see doing a 2:00 on softs in cooler conditions, say 20C or lower, but not for more than 2-3 laps. I've come to realize that the soft tire can't be pushed 100%, lap after lap. It's good for a couple quali laps, but then you have to back off, or risk melting them. Thinking of F1 lap times, it's not unheard of for race laps to be several seconds off quali laps, on the same tire. And it's not because the drivers can't push, it's that they know if they do, they will kill the lonngevity of the tire.

I do agree that the tires have issues, and there is a range of temps in the middle where neither the Hard or soft seems much good, but at the same time, it's tough to imagine conditions where you could lap Silverstone in the 2:00 range consistently, on soft tires, and not destroy them after a few laps.

The lap time you were doing to keep the temps around 175F is what it would take to keep the softs from melting based on your lap times and mine. That 5 or 6 seconds is unheard of in GT cars. Even for open wheelers that add one seventh of their weight in fuel for races that is a bit much. The 6.0 update in pCars 1 did the exact same thing to the tires and it was eventually revised so they wouldn’t melt. Let’s hope SMS does some adjusting here as well. Being able to push flat out on the hard tires when the track is hot but having to be 5 seconds off pace with softs when the track is cold is silly.

 

[paoloevans]

Has anyone done a 24 hour race yet?

Did you have tyre temp issues during the night?

I'm setting up and driving the 24 Hours of Daytona in solo mode and am concerned I'm going to have these issues. Im driving the 488 GT3 (simulating the IMSA GTD Class).

May have to run the soft tyres during the night running unless I can get the hards to work?!

I have done the WSCR Series in Career (again driving the 488 GT3) and there is a night race at Daytona in that Championship and I HAVE to use the softs there.

Any advice?

Thanks everyone.

 

[RomKnight]

There's a reason why in WEC they use softs only at night time. Pretty much every other time they'll use harder compounds.

The only other series I recall use softs is V8SC and ofc, they only have their peak in the first couple of laps (hards too) then they stabilise and when the grip is gone ... it's really gone.

Then we have that Formula Renault now Formula V8 3.5 where they use tyres that last a week (seriously, they're like Duracell or so it seems for managing costs)

Then there's F1 but it's Pirelli that decides what the teams will have, again, based on track conditions. But they have so many compounds that it doesn't quite apply to this discussion as the ranges are a bit more sensitive.

In any case, in pC2 even in sprint races i'd be careful to use softs unless really cold conditions as they'll get greasy very fast.

 

[05XR8]

As with tyre pressures, are camber angles and/or suspension set ups causing online tyre issues? Suspension too soft? Too hard? Differential causing too much much grip? Too much downforce?

 

[BrandonW77]

Thinking of F1 lap times, it's not unheard of for race laps to be several seconds off quali laps, on the same tire. And it's not because the drivers can't push, it's that they know if they do, they will kill the lonngevity of the tire.

That's not really much of an issue this year, they made the tires much stronger this year and some of them have been so durable that they basically can do the entire race on one set. The reasons they're slower in race than in qualifying are

1. They have a full race distance worth of fuel onboard during the race
B. They turn the engine maps up for qualifying to get that one magic lap and then turn them back down for the race in order to preserve the engine.
III. During the race they have to adhere to maximum fuel burn rates, so they can't go all out like they do in qualifying.

 

[RomKnight]

As with tyre pressures, are camber angles and/or suspension set ups causing online tyre issues? Suspension too soft? Too hard? Differential causing too much much grip? Too much downforce?

Unless the defaults are really bad - for your driving "style" at least but in this case it'll be hard anyway if you don't adapt to the car - setups are about to make the car feel more comfortable to the driver hence making him fast.

I usually don't touch the setup unless it can't really be driven (no setup suits every track even if only for the (lack of) bumpiness, a.e).

I've found out that I could be slower with a custom setup than some with the default and vice-versa. I once got my self beaten by nearly two seconds and that was on a short track so.. yeah... I've learnt that first I need to know the line. No way a custom setup will save me from that because when the guy tweaks his tune then i'll be kicked again.

ofc, all of that will impact on temps and wear and all that but if you're not driving properly, than it won't matter. You'll still be not using the car as it should and that I think hurts more than a bit more camber or lower pressures. Especially on longer races.

If anything, I adjust the brake bias. I've been holding myself when I race (rarely now and only online or TT) on defaults only. And believe me, TCR's can use every bit of help looking at the drivers online and yet...

Also why I don't jump to cars I'm not familiar with or from powerful to slower cars and vice-versa. To much of a jump online to adapt.

 

[ozwheels]

In any case, in pC2 even in sprint races i'd be careful to use softs unless really cold conditions as they'll get greasy very fast.

That’s what the majority of this thread is about. They get hot and greasy way to easy and you can’t just use them in night races as the hards are useless even in cool conditions so you have to use softs. For the sake of this discussion even in night races they overheat after 2 or 3 laps, that’s ridiculous. I’m very surprised this was never noticed during development. My league noticed it within days of playing for the first time.

 

[F1Racer68]

Has anyone done a 24 hour race yet?

Did you have tyre temp issues during the night?

I'm setting up and driving the 24 Hours of Daytona in solo mode and am concerned I'm going to have these issues. Im driving the 488 GT3 (simulating the IMSA GTD Class).

May have to run the soft tyres during the night running unless I can get the hards to work?!

I have done the WSCR Series in Career (again driving the 488 GT3) and there is a night race at Daytona in that Championship and I HAVE to use the softs there.

Any advice?

Thanks everyone.

Our first league race was a 2.4 Hours of Daytona using 10x Time Acceleration to simulate the full 24 hour cycle. We are also running an IMSA inspired format (LMP2, GTE & GT3).

I am running GTE so can only speak to that. I had ZERO issues with the tire temps. I ran softs for the entire event. The only tire adjustments I made for night time was to increase my cold starting pressures in order to ensure the tires were in the 31 - 32 psi range once hot. Tires remained within their working temperature range for the entire event.

As for car setup, I ran a slightly modified default (loose) setup on the Ford GT GTLM. Only gearing, downforce, brake ducts and brake pressures were altered.

The GT3 guys that ran didn't voice any major concerns outside of their usual individual complaints about tires (certain drivers always complain about the same things regardless of sim ).

 

[TexasTyme214]

I find GTE tires to run cooler overall. Their soft tire seems to have a much larger operating range when it comes to track temperatures. Between their two compounds, it seems like there aren't any gaps where no compound fits except extremely cold conditions.

For GT3, it sounds like softs are can only do night time in December and hards cover the upper 60-70% of the temperature ranges in game. There's that missing middle portion. I haven't used the soft tire much myself, but it seemed to work nicely in the fog at Red Bull Ring (August-October timeframe), cold and low-wear track.

Overall, you can't making a sweeping generalization about tire compounds from one class to the next, but it sounds like SMS should offer a medium and possibly intermediate tire where applicable.

 

[FuriousDemon]

From the official forums some info from Casey from SMS about target pressure for tires:

Sure thing. Here are some rough targets for the main tire groups.

Formula Cars (IndyCar, FX, FA, FR3.5): 1.7bar front / 1.45bar rear (24psi / 21psi) at road circuits. The Dallara IR-12 oval tires like up to 45psi on the right side.
Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.
Touring cars & V8 Supercar: 2.0-2.15bar front and rear
Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side
Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)
Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.
Vintage GT: Roughly the same range as modern GT
Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D

 

[twitcher]

From the official forums some info from Casey from SMS about target pressure for tires:

Sure thing. Here are some rough targets for the main tire groups.

Formula Cars (IndyCar, FX, FA, FR3.5): 1.7bar front / 1.45bar rear (24psi / 21psi) at road circuits. The Dallara IR-12 oval tires like up to 45psi on the right side.
Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.
Touring cars & V8 Supercar: 2.0-2.15bar front and rear
Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side
Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)
Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.
Vintage GT: Roughly the same range as modern GT
Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D

Finally. Thank you!

Looks like we've been setting GT cars too high...32psi is quite over inflated according to what this SMS guy is saying.


The frustrating bit is that most likely, none of this matters. It'll change in a patch, and we'll have to start from zero again.

 

[RvN76]

Our first league race was a 2.4 Hours of Daytona using 10x Time Acceleration to simulate the full 24 hour cycle. We are also running an IMSA inspired format (LMP2, GTE & GT3).

I am running GTE so can only speak to that. I had ZERO issues with the tire temps. I ran softs for the entire event. The only tire adjustments I made for night time was to increase my cold starting pressures in order to ensure the tires were in the 31 - 32 psi range once hot. Tires remained within their working temperature range for the entire event.

As for car setup, I ran a slightly modified default (loose) setup on the Ford GT GTLM. Only gearing, downforce, brake ducts and brake pressures were altered.

The GT3 guys that ran didn't voice any major concerns outside of their usual individual complaints about tires (certain drivers always complain about the same things regardless of sim ).

Would you mind having a try at Nurburgring GP? My CLK-LM doesn't like 32PSI at all. Much longer braking distances and more slippery cornering for me compared with 26-28PSI. I tried increasing negative cambers but didn't work.

 

[RvN76]

From the official forums some info from Casey from SMS about target pressure for tires:

Sure thing. Here are some rough targets for the main tire groups.

Formula Cars (IndyCar, FX, FA, FR3.5): 1.7bar front / 1.45bar rear (24psi / 21psi) at road circuits. The Dallara IR-12 oval tires like up to 45psi on the right side.
Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.
Touring cars & V8 Supercar: 2.0-2.15bar front and rear
Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side
Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)
Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.
Vintage GT: Roughly the same range as modern GT
Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D

Did the say why they set these targets? Are they close what those cars use in real races?

 

[twitcher]

From the official forums some info from Casey from SMS about target pressure for tires:

Sure thing. Here are some rough targets for the main tire groups.

Formula Cars (IndyCar, FX, FA, FR3.5): 1.7bar front / 1.45bar rear (24psi / 21psi) at road circuits. The Dallara IR-12 oval tires like up to 45psi on the right side.
Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.
Touring cars & V8 Supercar: 2.0-2.15bar front and rear
Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side
Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)
Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.
Vintage GT: Roughly the same range as modern GT
Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D

Just to clarify, those are pressure we should be aiming for once the tire is up to temp, correct?

Is there any way to get temp info as well? I'd like to know what the optimal temps for some of the old vintage GT cars are.

 

[FuriousDemon]

Just to clarify, those are pressure we should be aiming for once the tire is up to temp, correct?

Is there any way to get temp info as well? I'd like to know what the optimal temps for some of the old vintage GT cars are.

Yeah, target pressures when it’s at the target temp as I understand it.

 

[JohnScoonsBeard]

About GT3 cars Casey Ringley (Vehicle Technical Lead at SMS) says the following

"Real world target for hot pressure in these tires is more in the 1.8bar range (26psi). Can go slightly above or below, but most teams we talk to shoot in for something close to 1.8."

http://forum.projectcarsgame.com/sh...GT3-GTE-cars&p=1400025&viewfull=1#post1400025

Later in the thread, Casey also says

"Brake temperature actually has a much stronger effect on hot pressure than the tread temperature. If it feels good to you, keep running that way; but you might be giving up some grip over dropping the cold pressure a bit or running more brake cooling (if they are running too hot). As a general rule of thumb, all the brakes (carbon, iron, carbon ceramic) like to enter a heavy braking zone somewhere in the 300-350°C range (570-660°F)"

 

[NLxAROSA]

"Brake temperature actually has a much stronger effect on hot pressure than the tread temperature."

I observed this behavior on a cold track (6 deg C) yesterday when testing the Hard slicks. Stopped the car and temps/pressure went up. Started driving again and temps/pressure went down.

 

[twitcher]

From the official forums some info from Casey from SMS about target pressure for tires:

Sure thing. Here are some rough targets for the main tire groups.

Formula Cars (IndyCar, FX, FA, FR3.5): 1.7bar front / 1.45bar rear (24psi / 21psi) at road circuits. The Dallara IR-12 oval tires like up to 45psi on the right side.
Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.
Touring cars & V8 Supercar: 2.0-2.15bar front and rear
Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side
Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)
Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.
Vintage GT: Roughly the same range as modern GT
Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D

About GT3 cars Casey Ringley (Vehicle Technical Lead at SMS) says the following

"Real world target for hot pressure in these tires is more in the 1.8bar range (26psi). Can go slightly above or below, but most teams we talk to shoot in for something close to 1.8."

http://forum.projectcarsgame.com/sh...GT3-GTE-cars&p=1400025&viewfull=1#post1400025

Later in the thread, Casey also says

"Brake temperature actually has a much stronger effect on hot pressure than the tread temperature. If it feels good to you, keep running that way; but you might be giving up some grip over dropping the cold pressure a bit or running more brake cooling (if they are running too hot). As a general rule of thumb, all the brakes (carbon, iron, carbon ceramic) like to enter a heavy braking zone somewhere in the 300-350°C range (570-660°F)"

@IanBell , any chance of having vital information like this included in the actual game, instead of burried in a forum post somewhere?