PS4 Physics, Updates and Special EventsPS4

[Stotty]

Mediums might work, but when I tried them I couldn't carry the speed.

Personally, I would advise you use @HavanaB0B tune, but try trail braking - will allow you to brake a fraction later, and trailing the brakes in to the corner will help reduce turn in understeer.

 

[TT92]

Yes I did the time on the newest update.

Well that's sad........ for me :-( I will just have to try harder. It is certainly good to know that I am the problem.

Overheating the tires is going to happen no matter what you do, the asphalt temperature is high, and Barcelona kills the left side tires.

24psi hot or cold?

Cold.

You can always try mediums, with the high track temp they are going to stay in the optimal range much better than the softs.

Yes I have done that too and they seem to work very well at 18/19 psi

Understeer on entry could be solved by decreasing the coast on the diff if you haven't tried that yet.

I will give that a go as well.

Again thank you for your invaluable help and support. It is quite clear to me now that I am the problem and I will revert back to your tune and just keep at it.

BTW the other night I was also stuck at Bronze at Monza in the Huracan GT3. I plugged your tune in and first lap Gold. I have had a lot of success with your tunes, another was the Lotus 125 at Mugello. I couldn't even get to the bronze time and after about 15 laps I did that too. So I do respect your advice and your tuning ability, I am just at a loss why this particular car and track is being so hard. That's why I have "fiddled" with the tune.

 

[HavanaB0B]

I can't remember if my lap has the throttle/brake overlay thingy on, but as @Stotty says if you aren't already you should try trail braking. It is key to unlocking that extra bit of time in the GT3s, or any other medium to high downforce car.

 

[TT92]

I can't remember if my lap has the throttle/brake overlay thingy on, but as @Stotty says if you aren't already you should try trail braking. It is key to unlocking that extra bit of time in the GT3s, or any other medium to high downforce car.

Yes your video does have the throttle and accelerator inputs. I am finding trail braking just fries the soft tyres. I have just done about another 20 laps and medium tyres handle the temps better for me while doing the same times. But then both you and Stotty did this on softs It is almost as if I am trying too hard and once I cook the tyres at the big right hander the rest of the lap is just a right off.

It is raining here for the next few days so I will give this another good go tomorrow.

 

[Haulin_Hebrew]

Does anybody know when the PS4 will get the Assetto Corsa 1.31 update for the 2017 Porsche RSR GT

 

[ALB123]

Does anybody know when the PS4 will get the Assetto Corsa 1.31 update for the 2017 Porsche RSR GT

Yes. Soon®.

 

[Scuderia Paul]

Does anybody know when the PS4 will get the Assetto Corsa 1.31 update for the 2017 Porsche RSR GT

The v1.14 update is, according to Marco, in the hands of the platform holders Sony and Microsoft. Based on that I would expect a release date to be shared this week.

Hopefully.

 

[TT92]

I can't remember if my lap has the throttle/brake overlay thingy on, but as @Stotty says if you aren't already you should try trail braking. It is key to unlocking that extra bit of time in the GT3s, or any other medium to high downforce car.

Here is an update.

I have made a video of one of my typical runs so I can compare it directly to yours. I have just been concentrating on the first sector as that's where a majority of my time is lost. When I first started I was 1.7 secs down and in the video I am now only 0.3 down.

I have also studied some of your later set up videos for Barcelona with other GT3s where you talk the viewer around the track. I also enjoyed your video on comparing softs and mediums here as well.

So far my conclusions are: You are a great driver and tuner and I am losing front end grip. My mid corner speed around turn 1 and especially around the second part at turn 2 is 10% slower or just over 8mph and the car tends to run wide here. when you are at full throttle I am still only at at about 70% The funny thing is I can seem to pull some of this lost ground back again and the split is getting less.

It is a pity your video (unlike the others you have made) doesn't show tyre temps as I would find this very interesting. It seems to me the harder I try, the more I overheat the left tyres and the slower I go. A typical catch 22.

So I do realise it is down to me as both you and Stotty using your tune have proved it is doable with this tyre model and current physics.

I have tried medium tyres and the temps on these stay great BUT they are a little less grippy and so the lap times are the same for me. I also tried loosening the the Coast setting on the diff too without any success either.

I will say one thing, gee I know my way around this track now So I am still plugging away and not quite yet defeated. I was hoping to get all these events knocked over this week as I am away for 3 weeks and when I get back we will have new updates and I will no doubt be a little rusty.

So HavanaB0B thanks again for you videos, help and support.

 

[HavanaB0B]

It is stupidly easy to lose time in turn 2 and 3. Finding 1.4 seconds in a single sector is very impressive, the last little bit is probably going to be down to just hitting the marks perfectly. The final sector is my nemesis at this track, just takes laps and time to find a good rhythm.

 

[Stotty]

Here is an update.

I have made a video of one of my typical runs so I can compare it directly to yours. I have just been concentrating on the first sector as that's where a majority of my time is lost. When I first started I was 1.7 secs down and in the video I am now only 0.3 down.

I have also studied some of your later set up videos for Barcelona with other GT3s where you talk the viewer around the track. I also enjoyed your video on comparing softs and mediums here as well.

So far my conclusions are: You are a great driver and tuner and I am losing front end grip. My mid corner speed around turn 1 and especially around the second part at turn 2 is 10% slower or just over 8mph and the car tends to run wide here. when you are at full throttle I am still only at at about 70% The funny thing is I can seem to pull some of this lost ground back again and the split is getting less.

It is a pity your video (unlike the others you have made) doesn't show tyre temps as I would find this very interesting. It seems to me the harder I try, the more I overheat the left tyres and the slower I go. A typical catch 22.

So I do realise it is down to me as both you and Stotty using your tune have proved it is doable with this tyre model and current physics.

I have tried medium tyres and the temps on these stay great BUT they are a little less grippy and so the lap times are the same for me. I also tried loosening the the Coast setting on the diff too without any success either.

I will say one thing, gee I know my way around this track now So I am still plugging away and not quite yet defeated. I was hoping to get all these events knocked over this week as I am away for 3 weeks and when I get back we will have new updates and I will no doubt be a little rusty.

So HavanaB0B thanks again for you videos, help and support.

Without seeing your lap it's difficult to give precise advice, but reading your post I would think you have too much steering angle on... the more steering angle you have, the less throttle you can use... hence you only being able to go 70% when @HavanaB0B is at 100%.

Most likely reason IMHO, is you're trying to carry a fraction too much entry speed... which leads to a bit of mid corner understeer... which you sub consciously deal with by applying a bit more lock... it's a viscous circle.

And as well as this slowing you a bit, the increased slip angle is stressing the tyres... hence they go red very quickly.

We're not talking huge inputs, just fractions... but on this one, fractions ruin your lap.

Try sacrificing a tiny bit of entry speed, but get the car lined up for the exit earlier, and then carry more exit speed.

Might only be 1-2 mph on the way in that's hurting you.

Also, coast only affects handling when you're off the throttle (coasting or braking)... it won't help reduce mid corner or exit push.

Good luck 👍

 

[Donnced]

Does anybody know when the PS4 will get the Assetto Corsa 1.31 update for the 2017 Porsche RSR GT

Yup! The 1.14 update lands tomorrow on PS4!

Now we have to see how tyre model and updated physics affects the times of special events...

 

[BrandonW77]

Here is an update.

I have made a video of one of my typical runs so I can compare it directly to yours. I have just been concentrating on the first sector as that's where a majority of my time is lost. When I first started I was 1.7 secs down and in the video I am now only 0.3 down.

I have also studied some of your later set up videos for Barcelona with other GT3s where you talk the viewer around the track. I also enjoyed your video on comparing softs and mediums here as well.

So far my conclusions are: You are a great driver and tuner and I am losing front end grip. My mid corner speed around turn 1 and especially around the second part at turn 2 is 10% slower or just over 8mph and the car tends to run wide here. when you are at full throttle I am still only at at about 70% The funny thing is I can seem to pull some of this lost ground back again and the split is getting less.

It is a pity your video (unlike the others you have made) doesn't show tyre temps as I would find this very interesting. It seems to me the harder I try, the more I overheat the left tyres and the slower I go. A typical catch 22.

So I do realise it is down to me as both you and Stotty using your tune have proved it is doable with this tyre model and current physics.

I have tried medium tyres and the temps on these stay great BUT they are a little less grippy and so the lap times are the same for me. I also tried loosening the the Coast setting on the diff too without any success either.

I will say one thing, gee I know my way around this track now So I am still plugging away and not quite yet defeated. I was hoping to get all these events knocked over this week as I am away for 3 weeks and when I get back we will have new updates and I will no doubt be a little rusty.

So HavanaB0B thanks again for you videos, help and support.

For what it's worth, presuming this is the same on console and PC, in my recent experience pressures are far more important than temps. I used to worry about temps and never paid any attention to pressures and I was always concerned about not getting temps high enough and the car never felt like it had enough grip. I recently got an app that shows me what my ideal pressures should be (after driving a few laps) and once I get those dialed in to where they're staying +/- 1º, man it makes a world of difference! So much of a difference that I've gone from being a perpetual mid-packer to fighting at the front and even scoring a couple wins in the RaceDepartment club races and the car feels like it's stuck to the road. I never look at my temps anymore because if I know my pressures are in the green the car feels great and it's fast. Not sure if you guys have a way to monitor your pressures though, but if you let me know what car you were driving around Barcelona I can do a few laps and get the ideal pressures for you so you can see if it makes any difference. 👍

 

[Stotty]

For what it's worth, presuming this is the same on console and PC, in my recent experience pressures are far more important than temps. I used to worry about temps and never paid any attention to pressures and I was always concerned about not getting temps high enough and the car never felt like it had enough grip. I recently got an app that shows me what my ideal pressures should be (after driving a few laps) and once I get those dialed in to where they're staying +/- 1º, man it makes a world of difference! So much of a difference that I've gone from being a perpetual mid-packer to fighting at the front and even scoring a couple wins in the RaceDepartment club races and the car feels like it's stuck to the road. I never look at my temps anymore because if I know my pressures are in the green the car feels great and it's fast. Not sure if you guys have a way to monitor your pressures though, but if you let me know what car you were driving around Barcelona I can do a few laps and get the ideal pressures for you so you can see if it makes any difference. 👍

Car is the McLaren MP12 GT3. Track is Barcelona GP. To replicate in practice/hotlap, you'd need to adjust ambient temp/track temp as these are high in that specific event (I don't know what they are off thew top of my head).

I understand what you're saying about focusing on pressures - that's what I'd typically do unless the tyres were getting too hot.

But on this event, the optimal pressure leaves the rear left tyre bright red after a few corners. And even though the pressure might still be optimal (or within 1 or 2 psi), the car has no grip at all once the tyres are red.

 

[Whitestar]

For what it's worth, presuming this is the same on console and PC, in my recent experience pressures are far more important than temps. I used to worry about temps and never paid any attention to pressures and I was always concerned about not getting temps high enough and the car never felt like it had enough grip. I recently got an app that shows me what my ideal pressures should be (after driving a few laps) and once I get those dialed in to where they're staying +/- 1º, man it makes a world of difference!

Does that mean that you no longer do what Aris said here: http://www.assettocorsa.net/forum/index.php?threads/update-1-12-discussion.43113/page-8#post-840166?

Btw, do you have a link to that Ideal pressure app? Google was a bit ambiguous. Would like to try it.

 

[lancia delta hf]

For what it's worth, presuming this is the same on console and PC, in my recent experience pressures are far more important than temps. I used to worry about temps and never paid any attention to pressures and I was always concerned about not getting temps high enough and the car never felt like it had enough grip. I recently got an app that shows me what my ideal pressures should be (after driving a few laps) and once I get those dialed in to where they're staying +/- 1º, man it makes a world of difference! So much of a difference that I've gone from being a perpetual mid-packer to fighting at the front and even scoring a couple wins in the RaceDepartment club races and the car feels like it's stuck to the road. I never look at my temps anymore because if I know my pressures are in the green the car feels great and it's fast. Not sure if you guys have a way to monitor your pressures though, but if you let me know what car you were driving around Barcelona I can do a few laps and get the ideal pressures for you so you can see if it makes any difference. 👍

I only check my temps when i spin out, or periodically after a few laps. Generally i pay little attention to them and only recently starter paying attention to PSI.

 

[BrandonW77]

Car is the McLaren MP12 GT3. Track is Barcelona GP. To replicate in practice/hotlap, you'd need to adjust ambient temp/track temp as these are high in that specific event (I don't know what they are off thew top of my head).

I understand what you're saying about focusing on pressures - that's what I'd typically do unless the tyres were getting too hot.

But on this event, the optimal pressure leaves the rear left tyre bright red after a few corners. And even though the pressure might still be optimal (or within 1 or 2 psi), the car has no grip at all once the tyres are red.

If someone can let me know approximately what the track conditions are I'll give it a try and report back what the ideal pressures are on PC. Surprising that one of the rears would go red with ideal pressures, something must be screwy there as I never have an issue with tires getting overheated unless I'm seriously over-driving the car. Also be aware that my ideal pressures usually result in a different value for each tire, so I may have 17psi front right, 18 front left, 20 rear right, 22 rear left, and obviously this will change slightly from one track to another depending on how many right or left turns it has.

Does that mean that you no longer do what Aris said here: http://www.assettocorsa.net/forum/index.php?threads/update-1-12-discussion.43113/page-8#post-840166?

Btw, do you have a link to that Ideal pressure app? Google was a bit ambiguous. Would like to try it.

I only go by what Sidekick says now, I go do a few laps it will show how many PSI you need to add or subtract to get in the ideal range. Once I get them dialed in it's smooth sailing from there. Of course you need to take the weight of fuel into consideration too, if you set your pressures on low fuel and then fill up the tank for the race you'll probably find that your pressures eventually creep too high.

http://www.racedepartment.com/threads/sidekick.123608/

I only check my temps when i spin out, or periodically after a few laps. Generally i pay little attention to them and only recently starter paying attention to PSI.

I've only been paying attention to the pressures since I started using the app a few months ago but it's made an absolute world of difference. I've not done any serious testing to compare how the pressures affect temps and vice versa, but from my experience so far once you get the pressures right the temps will work themselves out (for the most part).

 

[Stotty]

If someone can let me know approximately what the track conditions are I'll give it a try and report back what the ideal pressures are on PC. Surprising that one of the rears would go red with ideal pressures, something must be screwy there as I never have an issue with tires getting overheated unless I'm seriously over-driving the car. Also be aware that my ideal pressures usually result in a different value for each tire, so I may have 17psi front right, 18 front left, 20 rear right, 22 rear left, and obviously this will change slightly from one track to another depending on how many right or left turns it has.

I'll need to check the event when I get home.

There are a few of the events like this on the console - where the outer rear tyre gets very hot after only a few corners.

 

[BrandonW77]

I'll need to check the event when I get home.

There are a few of the events like this on the console - where the outer rear tyre gets very hot after only a few corners.

I will try to replicate it on the PC. I've never done any of the events and outside of this thread I've never even really seen them discussed so I have no idea how they compare between the different platforms. I presume you're able to change the setups and pressures on these events, or do they force you to use a set setup? Let me know which event it is, I'll try it there and just hot lapping to see if there's any difference.

 

[Stotty]

I will try to replicate it on the PC. I've never done any of the events and outside of this thread I've never even really seen them discussed so I have no idea how they compare between the different platforms. I presume you're able to change the setups and pressures on these events, or do they force you to use a set setup? Let me know which event it is, I'll try it there and just hot lapping to see if there's any difference.

All the settings are changable

 

[WhoosierGirl]

Here's the conditions,

 

[BrandonW77]

Holy moly, that's warm! I'm not sure I've ever driven in air that hot on AC.

 

[Wiz]

I'm pretty sure that on console this McLaren still has v7 tires. So any comparison to the PC version is fairly useless at this point in time.

 

[HavanaB0B]

It is on the V10 tire model

 

[OdeFinn]

It is on the V10 tire model

Probably changes behaviour lot after update, so did Porsche RSR 3.0.

Cars feels now more realistic weight, mass movements are much more realistic.
Tire sinking is much much less now, I'll bet at they had lightened cars because that over sinking tire model (in physics wise, not tire model) and to counter that too big movements from down under asphalt they were using lightened car models to get mass movements on decent level. Now cars are feeling way heavier and tires aren't sinking in asphalt so much, mass movement reactions are way more realistic and no more bye bye rear when sliding, they have washed soap out from tires
These feelings are from RSR 3.0 and GT3 CUP Porsches which had v10 already.

 

[ALB123]

I'm not disputing anything Brandon has said -- if his driving has improved significantly, well, the proof is in the pudding. However, I do want to reiterate that the "Optimal Air Pressure" is not a set in stone thing. Yes, there is a setting in the tyres.ini files for every car that is called "PRESSURE_IDEAL=X degrees". Well, just like "WIDTH=245" doesn't mean the tire width is 245mm, but rather the skid marks of the tires are 245mm wide, don't completely burn an exact PSI number in your head for every car. For a particular operating temperature the ideal pressure is X degrees as defined in the tyres.ini file. The M4, for instance, is 38 degrees for street tires and 34 for semislicks. However, due to variable road surface temps, outside air temps & the tire temps you are able to maintain, it wouldn't be surprising to get the best grip with the M4 on semislicks at 33 or 35 PSI. In fact, I would bet that someone like @Stotty would have a different "ideal PSI" than me in several situations due to how much more he can push the tires compared to my old lady driving style. He gets more flex out of his tires and all that other fancy stuff.

Now. Yes...I absolutely WOULD aim for 34 PSI in the BMW M4 with semislicks. However, don't be afraid to experiment and see if you can hold 33 PSI and tire temps in an ideal range -- you might surprise yourself and find out that you are getting better grip.

@OdeFinn -- As you pointed out the Carrera RSR 3.0 was already on V10 tires, but Aristotelis re-calculated & adjusted inertia values for all of the cars which no doubt will provide a slightly different feel. For me, an average skilled driver at best, I find myself holding a lot of slides where I used to always spin out. Good drivers would have held them anyway, but not someone like me. Load transfer is much easier to feel through my wheel now with ALL cars on V10 tires.

 

[Stotty]

I'm not disputing anything Brandon has said -- if his driving has improved significantly, well, the proof is in the pudding. However, I do want to reiterate that the "Optimal Air Pressure" is not a set in stone thing. Yes, there is a setting in the tyres.ini files for every car that is called "PRESSURE_IDEAL=X degrees". Well, just like "WIDTH=245" doesn't mean the tire width is 245mm, but rather the skid marks of the tires are 245mm wide, don't completely burn an exact PSI number in your head for every car. For a particular operating temperature the ideal pressure is X degrees as defined in the tyres.ini file. The M4, for instance, is 38 degrees for street tires and 34 for semislicks. However, due to variable road surface temps, outside air temps & the tire temps you are able to maintain, it wouldn't be surprising to get the best grip with the M4 on semislicks at 33 or 35 PSI. In fact, I would bet that someone like @Stotty would have a different "ideal PSI" than me in several situations due to how much more he can push the tires compared to my old lady driving style. He gets more flex out of his tires and all that other fancy stuff.

Now. Yes...I absolutely WOULD aim for 34 PSI in the BMW M4 with semislicks. However, don't be afraid to experiment and see if you can hold 33 PSI and tire temps in an ideal range -- you might surprise yourself and find out that you are getting better grip.

My experience is that even if there's an 'ideal' tyre pressure for a particular car, they are only a starting point, and you will still need to adjust by reasonably significant amounts depending on the track.

Now I've got the Platinum trophy chase out of the way, I've been doing quite a bit of on-line racing. I've been running the 991R, and jumping between the various available GT3 on line events (Monza, Spa, Brands, Nurb endurance, Zandvoort & Barcelona)... some of these tracks put a much bigger strain on temps than others - So whilst I might be using say 15f/16r at Brands without problem, I might need 2-3psi more in the rears at Barcelona or Zandvoort due to the nature of the corners - fast, long, cambered corners create a lot of extra heat build up, particularly if the subsequent straight isn't long enough to allow the tyre to cool before the next corner.

If I don't adjust the pressures, the tyre pressures might be spot on, but once the tyres pass 90*c, the grip drops off significantly.

IMO, to get the best out of the tyres you have to balance pressure AND temperature.

Driver style/ability and its effect on tyres is an interesting one -

I'm not one for blasting up to corners, jumping on the brakes, stuffing the car in to the corner and then sorting everything out! I'm trail brake smoothly, get the nose in to the apex with a constant steering angle, and focus on getting the fastest exit possible.

If you constantly have the car sliding around, and you're constantly having to throw decent amounts of steering angle in to the car to correct it, you will be slow AND you will wreck your tyres faster.

 

[BrandonW77]

My experience is that even if there's an 'ideal' tyre pressure for a particular car, they are only a starting point, and you will still need to adjust by reasonably significant amounts depending on the track.

Yep. If a track has more right turns then left then heat/pressure is going to build more in your left tires, and vice versa. Have to make slight adjustments to each corner of the car for every track.

If I don't adjust the pressures, the tyre pressures might be spot on, but once the tyres pass 90*c, the grip drops off significantly.

IMO, to get the best out of the tyres you have to balance pressure AND temperature.

So far, in my experience, if you get the pressures right the temps take care of themselves. The only time I ever see tires get to 90º (in most cars) is if I have a massive slide but after half a lap the temps drop back down.

I didn't have time to test the Macca last night, and I'm planning to go down after work to watch Alonso practice tonight but if I'm home at a decent time I'll try to get on and test it. Not sure if it will be relevant though since you guys got an update today that might have changed things a little, but I'll still give it a go.

 

[TT92]

Not sure if it will be relevant though since you guys got an update today that might have changed things a little, but I'll still give it a go.

I can confirm that my times are about the same as before 1.14 landed. Although, the cars do feel better to drive and a little more planted.

One thing this update has done, the MP12 4C now has an awful transmission whine :-(

And the new Porsche RSR 2017 has broken R rear Camber adjustment :-(

As of Saturday I am away for nearly 3 weeks so these special events will have to go on hold. Perhaps indefinitely 🤬

 

[BrandonW77]

I can confirm that my times are about the same as before 1.14 landed. Although, the cars do feel better to drive and a little more planted.

Did you notice if there's still the issue of one of the rears going red?

 

[TT92]

Did you notice if there's still the issue of one of the rears going red?

More so the LH front but the LH rear still cops it too. To be honest I only did 2 whole laps and and about 5 goes to the first sector at Barcelona. Too many other goodies to play with

HavanaB0B hits the first sector timer at 31.3 secs. I know by then how my lap is going (usually badly) My good times are usually 31.8-31.9 (best is 31.6). At this point both left tyres are usually glowing cherry red as the big right hander just screws them up.