PHYSICS ACC V1.6 improved tyre model and DHE 2020 compound!

Whatever.

 

terrible graining now with the tyres even on the rears, on colder tracks there is no heating them above 80.
Have they put the decimal in the wrong place?

 

^
Yep, have noticed that the tires now seam to show the effect of abusing them, especially early.

Doesn't really bother me though, since we all have the same tires.

 

This is one of the only threads I can actually post on, keep getting "You have insufficient privileges to reply here!" on every single post. No idea how to fix this, and I can't download files.

 

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Tire walls have always been part of the sim physics at least for those experienced in real life racing and it's also why during long stints i and many others with the knowledge adjust ABS, Traction control and driving patterns such as braking and acceleration on the fly based on feedback.

 

Hi!

Fur curiosity sake I would like to know where does the reference optimum tire pressure of 27.3 to 27.9psi comes from because most, if not all, teams currently racing @ GTWCE are running pressures, hot, let's say... much lower than the recommended psi

I also did a short course with jorge segers, and he confirmed that the pressures run as low as possible, ignoring Pirelli's recommendation. Disclaimer: I'm not talking bad about the tire model, it's just a curiosity.

 

No it's not just curiosity it's simulation why you are asking. If you run 24-25 you'll not be able to maximize grip potential in ACC and you tire will take a beating due to under inflation leading to sliding etc. For the guide in game simply utilize the tire widget and make sure they look 1. Even. 2. Green to light yellow. 3. NEVER let the middle section of that widget look taller than the other sections. Also remember to ascertain from the engineers at the paddocks what ambient and track temperature ranges they work with per sessions.

 

Well, let me rephrase.

Because it’s a simulation I wonder where that pressure range for DHE came from, as teams never use the recommended values from Pirelli’s PDF.

I cannot give you exact values, but for a ambient temperature of 23 and track temperature around 30 they run around 15% less than the recommended value

 

@WRC_MADMAX
You missed the point.

 

I asked because the ranges you gave are the preheat ranges set by the tire blankets before track sessions.

 

I’m talking about hot pressures, not pre heat.

pirelli set a target hot of 29 psi (lol), the simulation sets a target hot of 27.5 and the teams run a hot of 24-26 (max).

I like that KS did lower than recommended hot pressures, but I just wanted to understand where it came from.

 

I think Pirelli set the recommended pressures so high because of preserving their brand image in case of tyre failure - they can then say that the car don’t used recommended pressures hence the tyre failure is caused by the team and not by insufficient strength of the tyre.

 

Here is the official Pirelli TYRE DATA BOOKLET:

https://pcaclubracing.org/wp-content/uploads/2020/05/32570518-DHD2-DHE-WH-2020.pdf

 

yes, your point is valid and well known. My point is that it would be lovely to have these small “tweaks” in the game that it is done irl to find extra tenths. It’s super rare to have tire failures in the world gt Europe, yet they’re running out of spec pressures.

It’s what teams do, it’s not cheating nor physics breaking and a nice exercise for us to find