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

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...
View attachment 806575
from: https://www.instagram.com/superformula_official/reel/DD0IyIiviqp/
What sim are Collins and Steve driving? I must be retarded: I don't see it...

Cheers
Robin
 
Premium
Absolutely, the offline chase the rabbit from last place/no qualification is a big gap!

Online there is qualifying and in the Nations Cup events, it's fantastic. Good practice, Good reasonable times for qualifying session. Very important in the full race scene.

But qualifying not even being an option - seems a game play choice that is a poor bad decision. It is very poor of them not to have an option to be able to qualify.

In addition to having a scenario you want to play out - maybe choosing a "lesser" car to increase the challenge, being able to take pole and stay in the lead for a half dozen laps may be the only way to win versus having a lesser car that just can't make up a 30s gap starting last.

Gran Turismo Ps5 GIF by PlayStation
 
To be honest, AMS2 is full of cars that are faster than their real life counterparts.
No sim is 100% spot on lap times wise, physics wise or feeling wise. But no other sim is so off, they put effort to be as close as they can be. Well, I don't know if iRacing puts any effort or that's their best, but no sim, probably even arcade is so off!
This is simply put absolute amateur effort.
If kids can do it, so should be highly paid adults!
 
No sim is 100% spot on lap times wise, physics wise or feeling wise. But no other sim is so off.

Realtime you put any sim in hands of decent pilot they can make them look to drive as well as another.

The biggest gulf in modern engines imho is most have robot AI which rightly so does rate a mention if you online.

However offline I find I quickly lose interest in AMS 2 / ACC when 3 races are almost like replays.

In ISIMotor I drive same race 100 times and no two are ever the same :coffee:

That is plain honesty not fan boyishness ;)


Robot AI with realistic times
Dynamic AI with unrealistic times
mmm hard choice.
 
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Realtime you put any sim in hands of decent pilot they can make them look to drive as well as another.

The biggest gulf in modern engines imho is most have robot AI which rightly so does rate a mention if you online.

However offline I find I quickly lose interest in AMS 2 / ACC when 3 races are almost like replays.

In ISIMotor I drive same race 100 times and no two are ever the same :coffee:

That is plain honesty not fan boyishness ;)


Robot AI with realistic times
Dynamic AI with unrealistic times
mmm hard choice.
I am sorry but what does "ISIMotor vs AMS2/ACC AI" do with iRacing GTPs being unrealistically fast?
 
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Premium
think about the inaccuracies they have got away with before - this just happens to be a high profile cars featured in many modern day sims and under lot of scrutiny
 
think about the inaccuracies they have got away with before - this just happens to be a high profile cars featured in many modern day sims and under lot of scrutiny

Oh it's a long running joke in other circles...

Which is why Reiza fanboys get upset when you say that Reiza copied iRacing with their LMDh physics... It doesn't matter that they did indeed copy the iRacing physics instead of watching WEC races, it's all because iRacing's reputation on physics is that low outside of iRacing fans...
 
Most sims are, for obvious reasons. But not by the margins iRacing are out by on these cars.
What are these obvious reasons supposed to be? I'd always expect a professional racing driver to extract the maximum from a given car in real life.
 
I'm scratching my head trying to understand how iRacing let this "slip" through the net, I respect them as developers (even though they live in a world where there are no other racing simulations...!) so I find it hard to believe no one internally noticed this monumental cock up. I mean Asobo (MSFS) are renowned for having incredibly poor Quality Control (see MSFS24 release) but I would expect iRacing to be so much better in this regard, begs the question What Else Is Wrong? Every time I feel like I'm getting close to resubbing, there's a reason not too.
 
It’s incredibly disappointing that a simulator with a budget likely surpassing all its competitors combined fails to deliver an experience worthy of that investment. We’ve spent two years with the GTP cars without a functional hybrid power system, which is a fundamental aspect of this category.

To make matters worse, they sell us content like the Ferrari with a 4x4 system that has no basis in reality. Do they really expect us to believe this is "real simulation"? With the resources they have, they should be leading the market in fidelity and realism, not falling behind in such crucial areas.
 
The problem is not iracing. I gave up years ago.

The problem is iracers. They are accepting blindly everything. They are without reaction to the disaster.

Iracing should be the best simulation on the planet. It is becoming the worst.
 
Thanks for the prompt and detailed response from the developers. I am looking forward to seeing how these develop, especially having the Hybrid work as intended! Its great to see Community engagement and further pushing the limits of what iRacing can achieve.
 
Premium
What are these obvious reasons supposed to be? I'd always expect a professional racing driver to extract the maximum from a given car in real life.
Because there is no risk to life in a sim you can push and push until you go over the edge then try again. You have unlimited track time. You don't get these things in real life so I'd expect sim times to be faster every single time.
 
Because there is no risk to life in a sim you can push and push until you go over the edge then try again. You have unlimited track time. You don't get these things in real life so I'd expect sim times to be faster every single time.
As I said, this does not account for more than two tenths per lap with a professional racing driver.
 
Premium
It’s incredibly disappointing that a simulator with a budget likely surpassing all its competitors combined fails to deliver an experience worthy of that investment. We’ve spent two years with the GTP cars without a functional hybrid power system, which is a fundamental aspect of this category.

To make matters worse, they sell us content like the Ferrari with a 4x4 system that has no basis in reality. Do they really expect us to believe this is "real simulation"? With the resources they have, they should be leading the market in fidelity and realism, not falling behind in such crucial areas.
When you get the spreadsheet arm chair types who have zero experience, but know it all, chanting it's the most realistic excel sheet in all of history, it's hard to tone down that echo chamber of ignorance.
bass GIF
 
The problem is not iracing. I gave up years ago.

The problem is iracers. They are accepting blindly everything. They are without reaction to the disaster.

Iracing should be the best simulation on the planet. It is becoming the worst.
Frankly, big part of the problem is that Kunos, Reiza & MSG haven't simply copied 1:1 iracing's online system, even just as an option. Copy that & you kill them. This is their only USP. Scott Dixon during the pandemic told them straight, it's bad for you to drive iracing. You can't go lower than this...
Also, their marketing is pretty damn good, but Kunos & Reiza instead of mocking the living hell out of them... they're quiet!
The iracers and all the other users like them, they're part sadly of our society. We've got cultish behaviour in so many walks of life, zombies galore! Most ppl are comformists, not rebels, so when they become users, then part of a community, they can easily be made into zealots using the methods long ago discovered by cult/religious leaders centuries ago. We've got the BMW, the Tesla, Apple, Bitcoiners & so many other coiners/brands... these companies have created close knit communities of zealots by projecting their success, claiming total superiority & never admitting any defeat. We live in the age of narcissists commanding large armies of zealots in narcissistic communities.
You can't argue with them & you can't expect logical behaviour from them. They don't think, they can only defend bcs they fear freedom & uncertainty. Choice is feared by them.
The infamous VC Marc Andreessen actually admitted it on a history podcast. I was reading about cults in around 2017, it's absolutely incredible how brands are exploiting people!
 
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