- 1,814
- San Diego CA
- Alex_ONeil
PITS 2-[Project International Touring Series 2]PS4
- Thread starter Alex ONeill
- 5,565 comments
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- 796
- Colorado
- ONESPACE
Yes, confirm for Sunday
- 3,575
- Vancouver, BC
- Falango
Different cars seem to have different setup options. You can't change the downforce on the Cayman, but you can on others. You can adjust the final drive of the Ginetta, but noticed you couldn't on the Cayman or Vantage.
As for engine temps, they sure didn't seem like a problem when I was testing the Vantage and Cayman. Engine temps were about 85C for me, below even the normal operating temps for most cars.
I ended up testing the Cayman and Vantage in comparable circumstances last night, and will run other cars on Sunday, because one didn't stand out over the other. I was surprised at how loose the Cayman was, probably because of the engine layout though. The Vantage instantly felt very predictable, very easy to control mid corner. Vantage ate tires though, because it's heavier, and I'm sure it used more fuel. It also felt better on the brakes. Times were very similar, but I did feel like I hard to work harder for that time in the Cayman. Maybe with a bit of tuning, and more time, the Cayman might be able to come out ahead. I briefly tried the Ginetta on a different track, and wasn't surprised with how easy it was to drive. Not as fast in a straight line, but it sure felt great on the brakes, and initial turn in felt great. I feel like it's not going to be as good as the Cayman and Vantage are when they're on the edge, though in wet conditions, maybe the Ginetta's balance will stand out.
As for engine temps, they sure didn't seem like a problem when I was testing the Vantage and Cayman. Engine temps were about 85C for me, below even the normal operating temps for most cars.
I ended up testing the Cayman and Vantage in comparable circumstances last night, and will run other cars on Sunday, because one didn't stand out over the other. I was surprised at how loose the Cayman was, probably because of the engine layout though. The Vantage instantly felt very predictable, very easy to control mid corner. Vantage ate tires though, because it's heavier, and I'm sure it used more fuel. It also felt better on the brakes. Times were very similar, but I did feel like I hard to work harder for that time in the Cayman. Maybe with a bit of tuning, and more time, the Cayman might be able to come out ahead. I briefly tried the Ginetta on a different track, and wasn't surprised with how easy it was to drive. Not as fast in a straight line, but it sure felt great on the brakes, and initial turn in felt great. I feel like it's not going to be as good as the Cayman and Vantage are when they're on the edge, though in wet conditions, maybe the Ginetta's balance will stand out.
- 3,575
- Vancouver, BC
- Falango
I initially started with hards, but tried softs, and still wasn't as happy as I was expecting. I started with the stable SMS tune for each car I tried, put 50L of fuel in, soft tires, down to around 1.2-1.3 bar on the pressure, and rebalanced the brake balance, and that's it. I do want to give it another try with a quick tune to the suspension and diff to see if I can get it to perform in corners the way I'd like. If I can, it will likely be my pick.
- 4,886
- Cloud 9
- Rednose58
I tried the same. But the tires start to melt after a few laps, no matter how high I put the pressure. On Softs it is almost impossible to spin out. On hards I can hardly keep it on the track - even on lower tire pressure. And when I get the temps where there is some grip, the temps start to run away again. I don't understand this car or a few of the other GT4's. I found the Aston's loose setup ok, but have the same problem with softs - temperature runs away and I am slower with softs that I can go with hards on a consistent basis.
- 1,814
- San Diego CA
- Alex_ONeil
- 1,187
- Virginia
- The__Camel
I'll take the #87 Rexott Porche Cayman. Also confirmed for Sunday
- 1,403
- North Carolina
- HazardLvL4
- 2,636
- MA
- CAPECOD104 SGETI
Some information I have come across recently that I thought would make for some interesting reading.
From Casey Ringley, vehicle technical lead,
You know, one thing I forgot about that track is the altitude effect on aerodynamics. Thinner air means less power from the engine, but it also means less downforce from the wings. It might be you want to adjust the wing settings in a setup for RBR specifically. Try taking the rear wing up to the max setting and then feed in extra front wing until it feels balanced.
It wasn't in 1, but is now. Altitude/barometric pressure affect the engine power, aero drag & downforce, and cooling of the tire, brakes, and engine.
We didn't go so far as to factor in temperature and humidity yet, but it's on a future wishlist. That kind of thing is a big deal at super speedways like Indianapolis.
Below is tire temp / pressure chart created by jimmyb 84 . http://forum.projectcarsgame.com/showthread.php?55303-Tire-temps-pcars-2
from Doug 914 , car physics and AI,
Great Post, and yes we modelled these modern slicks exactly as they are in real life. Softs are rarely faster than Hards because with the rubber tech nowadays the fastest compound is the one that matches the heat conditions. That means unless it's really cold ambient temps, the Hards are the ones to use.
i will say we that we adjusted the Hard's lower temp sensitivity slighty for patch 3, so there will be a bit more grip at low temps, so this might close up your gap you are experiencing between the softs and hards allowing the hards to be more widely usable. Most of the info for this came directly from the real drivers and the manufacturers themselves. Yes, The main heat build in the tires is slip or scrub (so "work" based). Another thing to be aware of is that the telemetries are showing bulk tread temps and not "flash" surface temps, which range 20-30C deg higher, but are difficult to work with for how rapidly they change.
For the specific problem of the 991R tires leaving the track, this is classic bumpstop contact being too aggressive. I'm not a big fan of bumpstops in real life chassis setup and also in virtual setups. So the first thing i would do is completly remove all the bumpstops. If that seems to have a positive effect on the problem, then slowly work them back up till you get a good compromise. Good luck
EDIT: Another item is too much diff lock in either direction, depending on if you are on or off the throttle at that point. My goto would usually be the decell side being too tight.
From Casey Ringley, vehicle technical lead,
You know, one thing I forgot about that track is the altitude effect on aerodynamics. Thinner air means less power from the engine, but it also means less downforce from the wings. It might be you want to adjust the wing settings in a setup for RBR specifically. Try taking the rear wing up to the max setting and then feed in extra front wing until it feels balanced.
It wasn't in 1, but is now. Altitude/barometric pressure affect the engine power, aero drag & downforce, and cooling of the tire, brakes, and engine.
We didn't go so far as to factor in temperature and humidity yet, but it's on a future wishlist. That kind of thing is a big deal at super speedways like Indianapolis.
Below is tire temp / pressure chart created by jimmyb 84 . http://forum.projectcarsgame.com/showthread.php?55303-Tire-temps-pcars-2
from Doug 914 , car physics and AI,
Great Post, and yes we modelled these modern slicks exactly as they are in real life. Softs are rarely faster than Hards because with the rubber tech nowadays the fastest compound is the one that matches the heat conditions. That means unless it's really cold ambient temps, the Hards are the ones to use.
i will say we that we adjusted the Hard's lower temp sensitivity slighty for patch 3, so there will be a bit more grip at low temps, so this might close up your gap you are experiencing between the softs and hards allowing the hards to be more widely usable. Most of the info for this came directly from the real drivers and the manufacturers themselves. Yes, The main heat build in the tires is slip or scrub (so "work" based). Another thing to be aware of is that the telemetries are showing bulk tread temps and not "flash" surface temps, which range 20-30C deg higher, but are difficult to work with for how rapidly they change.
For the specific problem of the 991R tires leaving the track, this is classic bumpstop contact being too aggressive. I'm not a big fan of bumpstops in real life chassis setup and also in virtual setups. So the first thing i would do is completly remove all the bumpstops. If that seems to have a positive effect on the problem, then slowly work them back up till you get a good compromise. Good luck
EDIT: Another item is too much diff lock in either direction, depending on if you are on or off the throttle at that point. My goto would usually be the decell side being too tight.
- 641
- Georgia
- swjaxon
- 1,403
- North Carolina
- HazardLvL4
My track choice is Imola
- 68
- Minnesota
Confirmed for tomorrow’s test day. I’m on right now testing if anybody wants to start up a lobby with me.
just started Roen Les Essarts
Last edited:
- 1,187
- Virginia
- The__Camel
Sorry if it's already posted but I can't seem to find it........what time does the test start tomorrow EST?
- 4,886
- Cloud 9
- Rednose58
I'll go with the Aston Martin Perelli 74 for now.
I will test the Cayman a bit more, but I just cant get it to work properly
Also, my house is up for sale and we have a viewing tomorrow that is going to interfere with race time. I might not show up for practice
I will test the Cayman a bit more, but I just cant get it to work properly
Also, my house is up for sale and we have a viewing tomorrow that is going to interfere with race time. I might not show up for practice
- 3,575
- Vancouver, BC
- Falango
What I've read about the tires is the softs give you grip right away, where hards need to warm more. I've noticed they barely give you an overall grip advantage, but because the grip comes in faster, you dont have to put wear on the tires to get to that maximum grip.
- 1,814
- San Diego CA
- Alex_ONeil
12 noon EST
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