stock tires not true-to-life?

  • Thread starter Bluebit
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Can I point out one seemingly obvious flaw with the lateral-g method shown above? The lateral-g number depends entirely on speed vs radius. Without accurately marking out an equivalent-width circle, how can you really compare the motortrend (or whomever) numbers to GT5 (even before you deal with the limitations of the game's g-meter etc)?
 
He's a member of staff - he knows exactly what you said as the staff can see deleted posts.

That you did it in German when referring to moderation has only one implication, I mean do you honestly believe you are the first down this route?

You have also been told not to continue this particular discussion and the penalty for failing to do so has been made quite clear. Something I would strongly recommend you think about during your two day time out.

You are not being banned for telling the truth (which you are still using an edited version of), you are getting a temp ban for repeatedly failing to follow the AUP and more worryingly for refusing to acknowledge that and undermining the staff on a regular basis.

See you in two days with what I hope is a significantly improved attitude.

He said no more about it until you brought it up...again!

Imo that last comment was "clearing the air" anyway and he had been contributing some good stuff to an interesting thread!

You do come across as having a bad day and not letting it go, it was all going great with everyone on topic until your last comment!
 
He said no more about it until you brought it up...again!

Imo that last comment was "clearing the air" anyway and he had been contributing some good stuff to an interesting thread!

You do come across as having a bad day and not letting it go, it was all going great with everyone on topic until your last comment!

You may want to review the chain of posts as he quite clearly brought it up again after being told not to do so in his reply to Pupik.

That alone was enough, that in doing so he was using an edited version of the truth didn't help matters either.

Right now all the two of you are going to do is get this thread locked and further moderation action put in place.

Its not a topic for debate or discussion and will end now or the staff will end the thread.
 
The stock tyre recommended thread is very likely to be obsolete now. PD keep messing with the tyres after each update.

With my group, we do not run race tyres anymore, for us, too much grip and wear too fast.

As an example, TVR Tuscan RM with 400bhp is being used with Sports Mediums and has tons of grip. Its really weird.

The GT500 car I ran 6 months ago in a championship was a beast on RS tyres but I now use Sports Mediums or Softs and I use DS3 D-pad to steer!!

Again any work/research on this subject may end up obsolete with another update. I wish PD would make there mind up with the tyres, though I do appreciate them trying to improve things.

Like is being said over and over again in this thread, the conclusion can never be definite due to all of the variables, but with what we have we can get a general idea of what GT5 tyres in terms of Lap times vs real life are a close match up.
 
Can I point out one seemingly obvious flaw with the lateral-g method shown above? The lateral-g number depends entirely on speed vs radius. Without accurately marking out an equivalent-width circle, how can you really compare the motortrend (or whomever) numbers to GT5 (even before you deal with the limitations of the game's g-meter etc)?

That's really only an issue for downforce equipped cars. If the car is zero lift or close to it like most street cars, the lateral g will just grow until it's tire limited rather than turning radius limited and it shouldn't change too much from there.

Besides, in GT the lateral grip is a fixed number for a given car. You can't account for effects that the sim doesn't model. Although if you wanted to, you could try to find a smooth, circular turn on one of the tracks in the game and just hope that PD modeled it to scale.

The whole thing has a bunch of problems just because we can't use real tires (and other inaccuracies), but reading the in game lateral g meter to estimate average lateral g is much easier than using the analyzer to match peak g.
 
The stopwatch doesn't lie. Granted the track modelling isn't perfect, but if you're within a second of the stock cars time at say laguna and 5 seconds at say, the Ring, that's a pretty good tire match (assuming your driving on the limit consistently).

I don't want to hear about real life drivers having to deal with fear either. That's complete bullhonkey. Fear is not a component to pushing the limit. Drivers may experience fear, but it doesn't slow them down.
 
fizzer
I don't want to hear about real life drivers having to deal with fear either. That's complete bullhonkey. Fear is not a component to pushing the limit. Drivers may experience fear, but it doesn't slow them down.

From the autobiographical accounts of a few drivers (Ben Collins, Jackie Stewart, Perry McCarthy, Danica Patrick) as well as a drivers psychology book by Mr. Christopher Hilton... I respectfully disagree.
 
From the autobiographical accounts of a few drivers (Ben Collins, Jackie Stewart, Perry McCarthy, Danica Patrick) as well as a drivers psychology book by Mr. Christopher Hilton... I respectfully disagree.

Danica Patrick aside (its clear fear slows her down, but I believe that's an exception, not the rule), citations please. My own personal experience disagrees that fear is a factor to ultimate pace. Ayrton Senna would have also disagreed that fear slowed him down.
 
fizzer
Danica Patrick aside (its clear fear slows her down, but I believe that's an exception, not the rule), citations please.

You'll have to read their books, and the Hilton one mentioned earlier. I'm at work. Also, Brock Yates book, Against Death and Time, has examples.

As for Senna, his lack may be why he isnt with us today.
 
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The stopwatch doesn't lie. Granted the track modelling isn't perfect, but if you're within a second of the stock cars time at say laguna and 5 seconds at say, the Ring, that's a pretty good tire match (assuming your driving on the limit consistently).
You are of course making the massive assumption here that GT5 models everything with almost total accuracy (and it clearly doesn't) not just the track.

You could get to within a second with GT4 and much closer than that with GT5 pre 2.0, what does that mean? That GT5 post 2.0 is now more accurate that the real world?

Nope, what it means is that lap times are a crude and massively inaccurate measure of a sim is.




I don't want to hear about real life drivers having to deal with fear either. That's complete bullhonkey. Fear is not a component to pushing the limit. Drivers may experience fear, but it doesn't slow them down.
Utter and complete bobbins, I could add to the list of books already quoted and also add in a piece in this months Evo that actually directly compares a driver who has never been to a track and runs it in a sim first. Running in Simraceway he was over a second a lap quicker at Infineon in the Sim than on the track, the main reason cited was a fear of stuffing the car until its real limits were known.

Everyone feels fear and its most certainly a factor in driving on track, and not just fear of injury, but also fear of throwing away a position and perhaps most of all of stuffing the car.

Fear and moments of panic happen to everyone, its how those situations are managed that differ. The true greats will push the limits of them, but that limit still exists.
 
Even F1 drivers feel fear in a sense, there are many near flat out corners on the F1 tracks that in a racing sim you can just go full throttle and see what happens without fear or worry that the car can't do it, in reality they have 'confidence lifts', because they just don't have the balls to try full throttle.
 
You are of course making the massive assumption here that GT5 models everything with almost total accuracy (and it clearly doesn't) not just the track.

Not at all. I'm making the (very sound) assumption that tires are, by at least an order of magnitude, the largest contributing factor to lap times both in sim and real life. That's why I suggested an acceptable range for sim laps matching RL laps.

Utter and complete bobbins, I could add to the list of books already quoted
Please do, I'd like to read them and judge for myself.

and also add in a piece in this months Evo that actually directly compares a driver who has never been to a track and runs it in a sim first.

Inconsequential, we're not talking about novices here.

Everyone feels fear and its most certainly a factor in driving on track, and not just fear of injury, but also fear of throwing away a position and perhaps most of all of stuffing the car.

Agreed, but I still contend that for most seasoned drivers, fear is not impacting the ultimate lap time. Especially with today's safety measures, drivers drive to the very limit of the cars/tires/track. Self-preservation does not limit speed.

The sims are faster because of fear argument has been around as long as there have been sims. IMO, its a weak excuse for a lack of realistic modelling.
 
You'll have to read their books, and the Hilton one mentioned earlier. I'm at work. Also, Brock Yates book, Against Death and Time, has examples.

As for Senna, his lack may be why he isnt with us today.

lack of fear? from senna? i couldn't care any less about f1 racing, i've never watched even 5 laps of one, and even I've heard Senna's comments about fear..

to paraphrase...part of the reason he drove so fast was because he couldn't see what was behind him, and he was too scared of getting rear ended to go slower.
 
Not at all. I'm making the (very sound) assumption that tires are, by at least an order of magnitude, the largest contributing factor to lap times both in sim and real life. That's why I suggested an acceptable range for sim laps matching RL laps.
That still doesn't mean that other factors don't play into this and you are making a huge leap in saying that any degree of accuracy can come from such a crude measure.

The lap time could be close but if the tyre modelling is off the lat-g could be higher than they should and the long-g smaller than they should, bingo your lap time has just misled in a rather major way. The end result would be a car that doesn't accelerate or decelerate as well as it should but corners quicker than it should, yet the lap times says all is well.


Please do, I'd like to read them and judge for myself.
I will put together a list for you.


Inconsequential, we're not talking about novices here.
Its quite clear you haven't read the piece in question as this....

  • 2011 NASA National Champion in Performance Touring E and Time Trial E categories
  • Recognized by Honda Performance Development
  • With co-driver Angelo Dinkov, winner of the NASA Midwest three hour endurance race at Road America, October 2011
  • Two top ten finishes in the Dodge Viper Cup series at Virginia International Raceway, July 2011
  • 2010 NASA Great Lakes Performance Touring E Champion
  • 2010 NASA Great Lakes Time Trial E Champion
  • Two top ten finishes in the Lucas Oil Off Road Racing Series in the Superlites category at Firebird International Raceway, December 2010
  • 2009 NASA Great Lakes Performance Touring E Champion
  • Winner of the 2009 Skip Barber Mazdaspeed Media Challenge race at Laguna Seca, California
  • Winner of the 2007 24 Hours Of Lemons Detroit
  • Winner of the 2006 One Lap of America, Alternative Fuel category
  • Fourteen current track records, including four at the renowned Mid-Ohio Sports Car Course and three at legendary Road America
  • Driven numerous tracks including the Nürburgring Nordschleife, Mosport, Mid-Ohio, Ascari, Laguna Seca, Road America, Road Atlanta, Infineon Raceway and Virginia International Raceway
Source - http://makse.com/motor-racing/


....is not a novice. Now please be kind enough to furnish us with your own motor racing experience (with proof of course) and you might have a point. I would personally consider someone who has "Fourteen current track records, including four at the renowned Mid-Ohio Sports Car Course and three at legendary Road America" has the ability to extract the most out of a car and track.



Agreed, but I still contend that for most seasoned drivers, fear is not impacting the ultimate lap time. Especially with today's safety measures, drivers drive to the very limit of the cars/tires/track.
And I disagree, it certainly doesn't limit it to anything like the degree it would most of us, but to dismiss it as a factor at all seems rather strange to me. Particularly as almost every racing driver ever to put pen to paper mentions it at some point.


Self-preservation does not limit speed.
Based on what exactly?



The sims are faster because of fear argument has been around as long as there have been sims. IMO, its a weak excuse for a lack of realistic modelling.
No its not a weak excuse for a lack of realistic modelling, its a totally different thing, it is however one of the factors involved in lap differences.

GT5 has a quite frankly appalling tyre model and a crude suspension model, both of which throw any lap time comparisons out of the window, however that doesn't mean that if they were corrected all of a sudden everyone would drive in exactly the same way they would in the real world.

One of the advantages sims (and I'm talking way beyond GT5 here) have in the motor sport world is that they allow drivers to try approaches to corners and track sections that they would never dare in the real world. The reason being that a sim has zero consequences if it all goes 🤬 up, you can dismiss that all you want but I'm not going to agree with you.
 
Can't wait until they implement publically the Datta Logger feature into the game. Would be funny if works as expected..





 
Since y'all mentioned all them books, I thought it would be nice to let y'all know that the documentary "Senna" is on netflix for streaming right now, it's under "Exciting Movies" if you use the PS3 Netflix. Gonna have to watch it when I'm not noddin out ;)
 
just a small observation.
here's an example

I just bought a new corvette ZR1, And it came with Sport/Hard tires.

turned TCS off (I presume it doesn't have any anyway :))
... and have you tried driving a Zr1, TCS off, on S/H ?

Terrible.

So my conclusion, is that either Chevrolet does not care for it's customers,
or that in GT5, newly bought cars just don't wear the actual tires they use in real life.

it's a shame, really. I don't like stuffing all of my cars with R3. but rather, the tires it really uses in real life.

lol what? I really hope you aren't saying that sports hard aren't grippy enough, that would be hilarious (as in hilariously stupid). Plus, seeing you mention using racing soft on a ZR1 suggests to me that you use a controller, in which case I don't understand how you think you can argue about this, what real life comparison can you make? And if it's a comparison by lap times, don't forget, you probably can't get the full potential out of the tires or car. The 7:25 lap time the ZR1 did at the ring is achieveable with comfort soft, and for most supercars, comfort soft are closest to the real thing. Sports hards are semi-slicks, and most supercars don't have semi-slicks because they're practically unuseable in the wet.

From real experience on track, comfort mediums are closest to tires found on some sports cars. I've driven evo's, a WRX, a Viper, a MX-5, and a Modified Chevelle. The evo and WRX tires, were like I said, closest to comfort mediums for sure. Same with the MX5. The viper however seemed to have better tires, and despite the 500hp under the hood, it still seemed like the tires had a bit more grip. The tires on the viper were wider of course so that is a factor.

The chevelle I drove, had a roll cage, about 600hp, and it was on racing slicks (soft compound) and really, even sports soft seem to have more grip than these slicks had. Really they felt most like sports soft. Especially in a race car in GT5, to me sports soft or even sports medium just feel the most like real slicks in gt5. Even if lap times are lower, they just feel more accurate anyways.

Compared to other, higher end professional simulators as well (netkar pro, iracing, LFS), street tires are most comparable to comfort mediums or soft in GT5, semi slicks feel like sports hard, and racing slicks range from sports medium to racing hard.

I've discussed this before while protesting the use of racing soft tires. There's no question, racing softs, and racing mediums also are just way too grippy. They're unrealistically grippy. I can't understand how people can enjoy them, or why they bother using them. Racing hards provide plenty of grip, while keeping a realistic feel.

Overall, the tires in GT5 need some work. To me, it feels like the same tires are on every car. What I mean is that it seems like ch, cm, cs, sh,.... etc. feel the exact same on every car to me, and obviously they shouldn't because each car has tires with different dimensions. I know that would mean there could be thousands of virtual tires in GT5, but I'd rather the cars have 2 sets of tires, and be accurate than have 9 tires, but be the same exact 9 tires every car has.

Plus, PD has mentioned that if you want to truly simulate real street tires that you should use comfort soft tires. It's been like that in every GT game. The cars may come with a certain tire, but according to them, and me as well you actually want to use less grippy tires to get closer to simulation.

In my opinion, GT5 has a great physics model but where it could be improved is the tires. They need to stop making the physics compromised to accomodate for people that use gamepads. I say screw gamepad users. You can't simulate anything with a controller, so why make a simulator for gamepads. It should be made for wheels, just like PC sims.
 
*EPIC POST*

I can understand why they've adopted the compromise model that they have. Can you imagine how hard it might be to model Pirelli P-Zeros vs Goodyear Eagle F1's, for example? There are thousands of potential tyre/car combinations possible should you choose to go down that route.

PS nice post!
 
Been testing for a while,with a g25/g27, comfort tires are the most closest for stock cars.

In the range 300-350pr I use comfort hard.350-450pr c.medium and then c.soft before a racecar.
 
Plus, seeing you mention using racing soft on a ZR1 suggests to me that you use a controller, in which case I don't understand how you think you can argue about this, what real life comparison can you make?

Couldn't bring myself to read the whole post because of these incredibly ignorant lines. How does using racing softs mean he uses a controller, and how would using a controller not give someone the right to voice on the matter?
 
TomBrady:
Good post..

But did you read the quote I posted on the last page?

It's clear that the tyres in GT5 is nothing but a grip multiplyer, that does not take dimensions in to the equation.
A Mini Cooper S can pull the exact same amount of lateral G's as a ZR1 on the same in-game compound.

So if you want to use a realistic tyre, look at the real life skid pad tests, and match to the closest you can get in GT5.
In some cases, you might need to use Comfort Softs to get it right, and in other cases you need Sport Mediums.
There's no way you can say that Comfort Softs (or whatever tyre) are closest to the real deal, cause of already stated reasons.
 
No stock car should have sport tires in stock form CS are sticky enough IMO. If you are having trouble then you need more practice with your throttle control.
 
I can understand why they've adopted the compromise model that they have. Can you imagine how hard it might be to model Pirelli P-Zeros vs Goodyear Eagle F1's, for example? There are thousands of potential tyre/car combinations possible should you choose to go down that route.

PS nice post!

It is difficult to model tyres well, however that's exactly what just about every other sim is doing and as a result GT is starting to fall behind in terms of physics.

That you can have thousands of tyre/car combos is just not an excuse, pick a tyre manufacturer and work with them, get accurate tyre data, understand it and incorporate it into your physics engine. Its not easy as tyres are amazingly complex, but its more than worth it and should PD keep ignoring that they are soon going to be trading on little more than past glories.
 
I can understand why they've adopted the compromise model that they have. Can you imagine how hard it might be to model Pirelli P-Zeros vs Goodyear Eagle F1's, for example? There are thousands of potential tyre/car combinations possible should you choose to go down that route.

PS nice post!

We don't need Pirelli's. We need tires made out of rubber and not stone.
 
TomBrady
lol what? I really hope you aren't saying that sports hard aren't grippy enough, that would be hilarious (as in hilariously stupid). Plus, seeing you mention using racing soft on a ZR1 suggests to me that you use a controller, in which case I don't understand how you think you can argue about this, what real life comparison can you make? And if it's a comparison by lap times, don't forget, you probably can't get the full potential out of the tires or car. The 7:25 lap time the ZR1 did at the ring is achieveable with comfort soft, and for most supercars, comfort soft are closest to the real thing. Sports hards are semi-slicks, and most supercars don't have semi-slicks because they're practically unuseable in the wet.

From real experience on track, comfort mediums are closest to tires found on some sports cars. I've driven evo's, a WRX, a Viper, a MX-5, and a Modified Chevelle. The evo and WRX tires, were like I said, closest to comfort mediums for sure. Same with the MX5. The viper however seemed to have better tires, and despite the 500hp under the hood, it still seemed like the tires had a bit more grip. The tires on the viper were wider of course so that is a factor.

The chevelle I drove, had a roll cage, about 600hp, and it was on racing slicks (soft compound) and really, even sports soft seem to have more grip than these slicks had. Really they felt most like sports soft. Especially in a race car in GT5, to me sports soft or even sports medium just feel the most like real slicks in gt5. Even if lap times are lower, they just feel more accurate anyways.

Compared to other, higher end professional simulators as well (netkar pro, iracing, LFS), street tires are most comparable to comfort mediums or soft in GT5, semi slicks feel like sports hard, and racing slicks range from sports medium to racing hard.

I've discussed this before while protesting the use of racing soft tires. There's no question, racing softs, and racing mediums also are just way too grippy. They're unrealistically grippy. I can't understand how people can enjoy them, or why they bother using them. Racing hards provide plenty of grip, while keeping a realistic feel.

Overall, the tires in GT5 need some work. To me, it feels like the same tires are on every car. What I mean is that it seems like ch, cm, cs, sh,.... etc. feel the exact same on every car to me, and obviously they shouldn't because each car has tires with different dimensions. I know that would mean there could be thousands of virtual tires in GT5, but I'd rather the cars have 2 sets of tires, and be accurate than have 9 tires, but be the same exact 9 tires every car has.

Plus, PD has mentioned that if you want to truly simulate real street tires that you should use comfort soft tires. It's been like that in every GT game. The cars may come with a certain tire, but according to them, and me as well you actually want to use less grippy tires to get closer to simulation.

In my opinion, GT5 has a great physics model but where it could be improved is the tires. They need to stop making the physics compromised to accomodate for people that use gamepads. I say screw gamepad users. You can't simulate anything with a controller, so why make a simulator for gamepads. It should be made for wheels, just like PC sims.

I agree absolutely, they should stop accommodating for mostly controller users, give us less grip, and a proper clutch. Make the game everything I want.
 
I agree absolutely, they should stop accommodating for mostly controller users,
The physics in GT5 (and for that matter most sims on console and PC) are not set dependent on the input device, they remain the same regardless of the control input.

What differs is how the inputs from the input device are read and then sent to the physics engine, controllers tend to have more filters to account for the small movements required to go from lock to lock and from zero to full 'pedal' range.

Its also worth pointing out that wheels and pedal set-ups (while undoubtedly better than a controller) have enough issues as well, with an awful lot of feedback that in reality doesn't get transmitted via the steering wheel, being in a lot of titles. Most of the primary ride feedback should not be fed into steering, yet for a lot of sims that's exactly what happens, some chose to show it visually via screen shake, head cam movement, etc. In reality this side of 'feel' is what you entire body experiences, in particular you inner-ear balance knowing that the car is not level, these kind of things are incredibly difficult to transmit in a sim.

Secondary ride (higher amplitude impacts - such as rumble strips) should be transmitted via the steering.

One of the issues of transmitting primary ride via a wheel (and one of the reason why a number of title don't do it) is that it can override the feel of what the tyres are doing.

Steering wheels in a large number of sims also are rather poor at correctly communicating how Self Aligning Torque behaves.



give us less grip,
I would rather we had the correct level of grip and a proper transition from grip to loss via slip percentages and angles, something that the current GT5 tyre model does very badly.



and a proper clutch. Make the game everything I want.
A proper clutch would be good with the ability to flat shift as well, however the game still needs a hell of a lot more that the above to be everything I want.
 
I agree absolutely, they should stop accommodating for mostly controller users, give us less grip, and a proper clutch. Make the game everything I want.

Why do you think controller users can't drive?

I can easily take a Cobra round the ring all aids including ABS off without going off on comforts!

And not everyone with a wheel is a sofa Senna!
 
Scaff
The physics in GT5 (and for that matter most sims on console and PC) are not set dependent on the input device, they remain the same regardless of the control input.

What differs is how the inputs from the input device are read and then sent to the physics engine, controllers tend to have more filters to account for the small movements required to go from lock to lock and from zero to full 'pedal' range.

Its also worth pointing out that wheels and pedal set-ups (while undoubtedly better than a controller) have enough issues as well, with an awful lot of feedback that in reality doesn't get transmitted via the steering wheel, being in a lot of titles. Most of the primary ride feedback should not be fed into steering, yet for a lot of sims that's exactly what happens, some chose to show it visually via screen shake, head cam movement, etc. In reality this side of 'feel' is what you entire body experiences, in particular you inner-ear balance knowing that the car is not level, these kind of things are incredibly difficult to transmit in a sim.

Secondary ride (higher amplitude impacts - such as rumble strips) should be transmitted via the steering.

One of the issues of transmitting primary ride via a wheel (and one of the reason why a number of title don't do it) is that it can override the feel of what the tyres are doing.

Steering wheels in a large number of sims also are rather poor at correctly communicating how Self Aligning Torque behaves.

I would rather we had the correct level of grip and a proper transition from grip to loss via slip percentages and angles, something that the current GT5 tyre model does very badly.

A proper clutch would be good with the ability to flat shift as well, however the game still needs a hell of a lot more that the above to be everything I want.

Oh don't get me wrong I obviously agree with all you said, how ever I am currently on the mobile app and didn't have the time to write all of that;) haha. I know there is much more to be worked on I'm GT5 for it to be the actual game I want it to be.. Oh well, project cars is less then a year away:tup:
 
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