iRacing To Work On GTP Tyre and Hybrid Fixes

iRacing 499P.jpg
Image: iRacing.com
After some strong backlash over the discrepancies between the five GTP cars in iRacing compared to their real-life counterparts, the developers have confirmed they will be prioritising updating these cars.

Back in late 2022, the first of the five current GTP cars were added to iRacing, the BMW M Hybrid V8. Since then, it has been joined by the Cadillac V-Series.R, Acura ARX-06, Porsche 963 and most recently, the two-time Le Mans winning Ferrari 499P.

However, with the most recent build of iRacing showing glaring inconsistencies between the cars in-sim compared to reality, the community have been up in arms. The cars were proving to be way too quick in corners due to a reworked tyre model, and the hybrid system has not been working as it does in reality.


As a result, Christopher Lerch - Vehicle Dynamics Manager at iRacing - took to the iRacing Forums to confirm that they are prioritising correcting these issues with the GTP cars, with these fixes coming in two stages.

iRacing GTP Fixes​

Lerch's statement read as follows:

"While we are pleased with the driving feel improvements and advancements made with the latest tyre model version, the car-specific models that debuted on the GTP class and LMP2 missed the mark with grip, resulting in higher than desired cornering speeds. Beginning with GTP, our redevelopment will involve a comprehensive reconstruction of the physical tyre and its composition - as a result, expect to recalibrate expectations around how the cars drive at the limit. We are targeting releasing updated tyres next season.

Once the tyre re-dev picks up steam, we will begin a complete overhaul of the hybrid system, to bring it up to date with the design of the current real world cars. A hybrid system overhaul might take a bit longer than the tyre work, so we do want to set expectations appropriately and you may not receive these updates until later. The GTP cars will respect the wheel power limits specified by the rules, and will replenish energy during pit stops. The 499P will follow the appropriate ruleset, and will not deploy electrically below 190 kmh.
"


As a result of this, these changes will not be made in time for the upcoming Daytona 24 in January but in short, as Lerch stated, the dev team aim for the tyre model to be amended in time for 2025 Season 2 which will begin in early March. For the hybrid system changes though, those have not been specified yet, but it will be 2025 Season 3 at the very earliest, which is early June.

Alongside the changes being made to the GTP cars, it is also worth noting that whilst they are not confirmed by iRacing, there may be a chance that the Lamborghini SC63 and upcoming Aston Martin Valkyrie AMR-LMH could very well be joining the service. So with these changes being made to the category, these cars - if they are getting added - would also benefit from the tyre and hybrid model re-works.


What do you make of the iRacing GTP tyre and hybrid criticism? Let us know in the comments below and join the discussion in our iRacing forum!
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RedLMR56
Biggest sim racing esports fan in the world.

Comments

Iracing should think about creating a new simulation from scratch. They have the resources to do that.

They can't continue with their ridiculous driving model where the cars are floating on the track.

But iracers are still spending money on it. So things will not change.
 
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LMU forcing the big day to it's knees...

Glad to see the sim racing community get iRacing to finally focus on getting physics right... They did hire the right tyre guy for the job in the man behind the TGM...

Yes, they hired TG quite some time ago. But he is base physics code, the big stuff specialist. I don't think he dabbles a lot with parameters, researching and configuring. Or maybe he does that also ? Constructing the simulation, should probably give great knowledge about what parameter ranges are to be expected for what cars, some of them maybe.
 
Premium
Great to See Jimmy Broadbent calling things out as his Gran Turismo and it putting him into real world experience makes it easy to see the glaring deficiencies in all the rest.

Even Steve Brown and Ben Collins ( Aka The Stig ) quickly finding these sims have some very unrealistic issues.


Oh and I. Fraga who took the Gran Turismo perfection and is now setting records in Super Formula Racing...
1734751911856.png

from: https://www.instagram.com/superformula_official/reel/DD0IyIiviqp/
 
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Yes, they hired TG quite some time ago. But he is base physics code, the big stuff specialist. I don't think he dabbles a lot with parameters, researching and configuring. Or maybe he does that also ? Constructing the simulation, should probably give great knowledge about what parameter ranges are to be expected for what cars, some of them maybe.

That's all going to be very important on their new engine... Getting that base right could really make Dave K's ideas actually sing rather than be a butter show...

But the biggest thing is that they are now forced to make a larger difference by their fan base because of the weather game... The rain will make the dry tyres better...

It's actually quite the positive time for iRacing fans... LMU has making iRacing actually take notice of what physics they put out there is just the cherry on the top...
 
iRacing is VERY unprofessional. You don't need to be a rocket scientist to compare lap times, top speed & corner speeds. This is ALL public information on the timing pages.
They claim to be realistic, in fact they have this giant ego of being the best, being better than anyone else and many of their... to be frank... users who show signs of cult followers, they claim iRacing is vastly superior and mock other sims!
Yet, they license, release and sell a Ferrari(as a Ferrari fan I find this very disrespectful) that is sooo off that it takes corners with some 50 kph difference! This shows their true colors of quality.
Nobody has even thought of comparing their model to reality, even lap times. But why?
Do they have dedicated testers, do they have the practice comparing to reality, do they have open communication with manufacturers, teams and drivers? To some or may be to all of these questions the answer is a clear loud NO!
A small team in poor Brazil is managing to do all of this with Automobilista, yet the VC backed Boston native iRacing can't do it. Kids doing mods manage to BoP cars and make new cars matching lap times, yet these Boston magicians can't.
What.... a.... joke!!!!!
I hate the fact so much of the sim racing is concentrated on it. These lamers(I find even this word mild for this case) don't deserve it, even 1%.
Yet, championships, manufacturers are working with this organization. Their marketing team is amazing, their product is below standard.
Like Senna famously said: I don't have idols. I admire work, dedication and competence.
Uncompetence of this scale does NOT deserve any respect in any form of racing, including sim racing.
 
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Premium
iRacing is VERY unprofessional. You don't need to be a rocket scientist to compare lap times, top speed & corner speeds. This is ALL public information on the timing pages.
They claim to be realistic, in fact they have this giant ego of being the best, being better than anyone else and many of their... to be frank... users who show signs of cult followers, they claim iRacing is vastly superior and mock other sims!
Yet, they license, release and sell a Ferrari(as a Ferrari fan I find this very disrespectful) that is sooo off that it takes corners with some 50 kph difference! This shows their true colors of quality.
Nobody has even thought of comparing their model to reality, even lap times. But why?
Do they have dedicated testers, do they have the practice comparing to reality, do they have open communication with manufacturers, teams and drivers? To some or may be to all of these questions the answer is a clear loud NO!
A small team in poor Brazil is managing to do all of this with Automobilista, yet the VC backed Boston native iRacing can't do it. Kids doing mods manage to BoP cars and make new cars matching lap times, yet these Boston magicians can't.
What.... a.... joke!!!!!
I hate the fact so much of the sim racing is concentrated on it. These lamers(I find even this word mild for this case) don't deserve it, even 1%.
Yet, championships, manufacturers are working with this organization. Their marketing team is amazing, their product is below standard.
Like Senna famously said: I don't have idols. I admire work, dedication and competence.
Unprofessionalism of this scale does NOT deserve any respect in any form of racing, including sim racing.
Yep, Accuracy, Fidelity, Realism, this is paramount.

Battlestar Galactica GIF by PeacockTV
 
Iracing should think about creating a new simulation from scratch. They have the resources to do that.

They can't continue with their ridiculous driving model where the cars are floating on the track.

But iracers are still spending money on it. So things will not change.
Iracing is very frustrating, I think its arrogance. I am one who has paid and long suffered, silly me. Yes, you can't really feel the track, on a supposedly advanced sim. And then there are some dumb things. 8 min to qualify at Le Mans. You can only start your 2nd flyer in a GTE when there are only some 3 minutes on the clock. Does it follow real life and let you finish the lap? No! Been like this since Day 1!! Go figure. It rips the wheel from your hands to add insult to injury...
 
Premium
So the funny thing is, for all the noise by iRacing about how accurate it is, it is arguably not the most accurate simulation of IMSA at the moment, nor will it be for the next season. Given their resources, that's kind of embarassing for their flagship road series.
 
I am a bit torn appart on this problem. On one side I think that issues with newly released content are to be expected. On the other hand with the prices that they are asking for and for how long they have been selling those GTP cars, it shouldn't take people doing such videos to notice such severe issues before actually releasing the content for those insane prices to meat a deadline. This actually smells like selling broken stuff with intent to grab money. Are people able to refund cars on iRacing? And especialy cars being faster in the rain than RL times in the dry doesn't seem like a small issue that "accidently slipped" into the release build. That the "prime" sim hasn't managed to do the hybrid stuff properly while other smaller studios have managed/or atleast tried to make some effort in that regard is just the icing on the cake and people looking for excuses like - the virtual energy stuff is just too complicated for the users thatswhy they didn't do it - makes it kind of even more hilarious. Especialy from people who complain about MSG but are fine with stuff like this. Whose bread I eat, whose song I sing.
 
How I'm looking at this. You better release a perfect car if you hide your content behind a subscription.

How can they ensure us they won't mess up again? I think they can't.
I'm sorry but the content should've been taken offline, reworked and then put online again. Instead it's an arcade game now.

So are there more cars, classes or even tracks with these issues? Is it the first time it happened? How can iRacing prevent this in the future? All kind of questions from my wallet.
 
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I think that their new managers have no real passion for cars. they are just doing business.

Some months ago I posted on their forum about the inaccuracy of the formula vee (the most important car in all the service). And it appeared that most iracers don't know very well the car and its history. So being it correct or no was some sort of metaphysics.
 
Premium
I´m so happy. Imagine have no other options, and think this is as real as it gets.
 
Premium
I think that their new managers have no real passion for cars. they are just doing business.

Some months ago I posted on their forum about the inaccuracy of the formula vee (the most important car in all the service). And it appeared that most iracers don't know very well the car and its history. So being it correct or no was some sort of metaphysics.
Very sadly, far far too many sim racing elitists can't be bothered to spend even a moment at speed behind the wheel. Far too many are more focused on their rig tweaking, or spreadsheet twiddling, or propaganda spewing and simping.

It only ensures the actual sim racing suffers and declines. Real world racers find the best sim that matches reality and feel with the most fidelity, accuracy, and realism, and the elitists with zero clue of reality go into overdrive to protect their fragile egos and remain in a distorted delusion.

Those who love the racing and sim racing will always be honest and objectively factual to make every title improve and grow and create an overall better field. But when identities are dangerously entangled in products and purchases, the inability to discern opinion from fact rots the niche. And honestly the rot has gotten VERY VERY bad. and like any rot, it doesn't take much to ruin something entirely. Rust and fatigue in critical places can ensure an entire chassis/subframe/airframe/etc is fully untenable.

But calling it out with clear suggestions on what the fix is, and listening to those with experience and first hand knowledge is absolutely fundamental.

But we all know the clicks demand hyperbole and self appointed experts to turn mole hills into mountains and distract from critical issues - aka, when a title won't allow even have the ability to access and backup your photos and replays as in Gran Turismo 7 and there aren't unlimited automatic real time replay saves. Just some antiquated set space size that you see the % remaining in game only. And they advertise endlessly No Limits.

And marketing becomes what everyone regurgitats. Premiere racing sim... absolutely untrue, just hyperbolic media manipulation, but it works. someone saw it on the internet, so it must be true, and so the echo chamber spirals.

Some may seem minor, but they have far reaching impacts, especially when you are forced into renting, denied access to what you create, and then to make it even more likely illegal, only when you have been forced to pay for long periods that the backup to be restored, is incomplete and you lost your content creation after having paid months or years and know left fully ripped off.
 
Premium
Very sadly, far far too many sim racing elitists can't be bothered to spend even a moment at speed behind the wheel. Far too many are more focused on their rig tweaking, or spreadsheet twiddling, or propaganda spewing and simping.

It only ensures the actual sim racing suffers and declines. Real world racers find the best sim that matches reality and feel with the most fidelity, accuracy, and realism, and the elitists with zero clue of reality go into overdrive to protect their fragile egos and remain in a distorted delusion.

Those who love the racing and sim racing will always be honest and objectively factual to make every title improve and grow and create an overall better field. But when identities are dangerously entangled in products and purchases, the inability to discern opinion from fact rots the niche. And honestly the rot has gotten VERY VERY bad. and like any rot, it doesn't take much to ruin something entirely. Rust and fatigue in critical places can ensure an entire chassis/subframe/airframe/etc is fully untenable.

But calling it out with clear suggestions on what the fix is, and listening to those with experience and first hand knowledge is absolutely fundamental.

But we all know the clicks demand hyperbole and self appointed experts to turn mole hills into mountains and distract from critical issues - aka, when a title won't allow even have the ability to access and backup your photos and replays as in Gran Turismo 7 and there aren't unlimited automatic real time replay saves. Just some antiquated set space size that you see the % remaining in game only. And they advertise endlessly No Limits.

And marketing becomes what everyone regurgitats. Premiere racing sim... absolutely untrue, just hyperbolic media manipulation, but it works. someone saw it on the internet, so it must be true, and so the echo chamber spirals.

Some may seem minor, but they have far reaching impacts, especially when you are forced into renting, denied access to what you create, and then to make it even more likely illegal, only when you have been forced to pay for long periods that the backup to be restored, is incomplete and you lost your content creation after having paid months or years and know left fully ripped off.
A lot to take in there but...
Yes, some of the points you make I have encountered, but we all many of us have a a different outlook or desire for a given we could pick up on there is no qualifying in Gran Turismo now, perhaps there's no call for it in their customer base, that customer base is less likely to be the hordcore motor racing fan and more likely to be the casual gamer*, hence most of their career mode races are 3-5 laps on a rolling start (where a player needs a car 4-8 seconds a lap faster than the leader to catch up)
But if that market is where the money is... I can't say they're doing it wrong, it doesn't suit me so I make my choice with that in mind.
On-line racing, Sony have their subscription, and it seems to work for them but the last time I played GT7 (I say played... but what I actually mean is attempted a race and remembered the handling and dive boming, the running out of fuel after three laps... and stopped for good) but the last time I looked at the stats it was some 70-80% of players had never completed an online race and only 10% or so have done 50 races online.

This brings us back to the old, solo player needs good AI and respectable physics because solo offline is played far more than online, but if renting a serverout and DLC is where money is for the studio that's up to them.

As for photo and replay back up, I don't use those much my lad did though in GT7...a lot, I have some old races in GTR2 that I's saved and only ever watch back once, for me the joy is in the journey, I don't mind if I start 27th and come home in 17th, if the ride made me happy the results don't matter.

* by casual gamer I mean the guy or gal that will put the stage 3 race thingy-m-bob on to win races, without knowing what it is, what it does, how it works, or even cares what or why... it fits their fave car and they win.
 
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