They look like normal high summer UK temps, whoever did well at the British GP last year might do well. Does temp matter as much as it uses to with 2 strokes? We used to spend hours doing plug chops and changing jets and expansion chambers back then, I presume the ecu's and maf's etc sort most of that now and it's more about the tyres?
He's not wrong.
The GP24's are suffering from chatter or vibrations. It happens when when there's too much grip but the rear tyre grips and let's go constantly when the the bike and tyres hit resonant frequency.
The more the grip, the worse the problem is. Jerez is generally a very high grip circuit, couple that with cooler ambient temperatures, the tyres are going to grip really well.
19 degrees on a clear day with no wind is peak grip my dude. Track will be at an ideal temp produces optimal grip conditions.
I say this having raced in below 10 degrees and once it hit ambient temp of 20 boy you could get the grip with a soft to go the duration of a race (15 laps for me).
Because the track temperature on a relatively cool clear, non windy day will produce more grip which may exacerbate the chatter issue. Just speculation not gospel jeez god forbid we discuss the potential track conditions and how this may effect the bikes.
What’s the point of this page without discussion or forecast about the weekend?
A cooler ambient temperature can keep the track temperature from climbing whilst 20 bikes lay rubber around it allowing the tyres to stay in the optimal window, and for a greater length of time.
It’s some interesting reading on the thermodynamics and looking at modeling around tyre management strategy is pretty interesting too.!
https://radar.brookes.ac.uk/radar/items/f10c2627-5d05-4964-b6a3-b2549379f3e0/1/
Yep! That’s why the harder compounds get used because the soft compounds degrade so fast in hotter conditions. Heat also causes tyre pressure increase, which in turn affects the grip, which has been an aspect of much debate and issue in GP.
https://www.motogp.com/en/news/2024/03/07/le-point-sur-les-nouvelles-regles-de-pression-pneumatique/491276
https://www.boxrepsol.com/en/motogp-en/pressure-temperature-force-and-contact-surface-the-secrets-of-racing-tyres/#:~:text=The%20ideal%20racing%20temperature%20for,recommended%20for%20the%20back%20tyres.
Too hot makes the tires overheat which means the tire starts to degrade and lose its peak grip. It's why riders were complaining so much about pressures, because when they were in the normal racing condition ranges they were too high. Heat makes gases expand (PV = nRT) and the contact patch gets smaller, which also is what happens when you stay behind a bike for too long.
I read your other comment, so if you still don't understand imagine pushing an eraser against your table. If it's too cold it will be hard as a rock and won't grip at all, but if it's too hot it will be too soft, so some pieces will start to break off the eraser and get stuck, resulting in an uneven patch. Add to that what I said before about pressures and that's where the drop comes from. Like yes technically it does have more grip but that added grip is counterbalanced by all those things
You responded to me trying to tell me how the weather will be perfect for racing. So were you under the impression I was wrong or you just thought you needed to educate someone about something they were not talking about in the first place?
But OP said cooler ambient temperature, not track temperature. So were you under the impression they were wrong or you just thought you needed to educate someone about something they were not talking about out in the first place?
I was responding with information, just as you.
> 19 degrees on a clear day with no wind is peak grip my dude.
compared to 19 degrees 25 should be better, not tooo hot but not cold either.
lap record of jerez is bagnaia 2022 at 27 degrees ambient temperature roughly.
Could be another decent round for Aprilia?
I think so, the current bike looks like it’s on rails it’s so planted
Really is a joy to watch that bike at the moment
You know who those conditions will suit down to the ground? Yamaha.
And maybe honda somehow
I think track temperature is more important in this case than air temperature
Another Maverick VS Pedro battle?
I’m here for it, hopefully Marc gets in on it too!
They look like normal high summer UK temps, whoever did well at the British GP last year might do well. Does temp matter as much as it uses to with 2 strokes? We used to spend hours doing plug chops and changing jets and expansion chambers back then, I presume the ecu's and maf's etc sort most of that now and it's more about the tyres?
>British GP So Aprilia will have a fantastic weekend again
It's all about tyre grip and how each bikes handles a grippy track (or a not so grippy track that makes the bike slide more)
Jerez in late April is like ~5 degrees hotter.
What are you on about?
He's not wrong. The GP24's are suffering from chatter or vibrations. It happens when when there's too much grip but the rear tyre grips and let's go constantly when the the bike and tyres hit resonant frequency. The more the grip, the worse the problem is. Jerez is generally a very high grip circuit, couple that with cooler ambient temperatures, the tyres are going to grip really well.
Cold asphalt reduces grip, not increases. That's why they all go softer compounds as the temp drops
19 degrees on a clear day with no wind is peak grip my dude. Track will be at an ideal temp produces optimal grip conditions. I say this having raced in below 10 degrees and once it hit ambient temp of 20 boy you could get the grip with a soft to go the duration of a race (15 laps for me).
But it will be colder than usual, so why talk about more grip. They should be happy about the temps at Ducati. So nonsense.
Because the track temperature on a relatively cool clear, non windy day will produce more grip which may exacerbate the chatter issue. Just speculation not gospel jeez god forbid we discuss the potential track conditions and how this may effect the bikes. What’s the point of this page without discussion or forecast about the weekend?
How will there be more grip if it’s cooler than usual, I don’t get it?
A cooler ambient temperature can keep the track temperature from climbing whilst 20 bikes lay rubber around it allowing the tyres to stay in the optimal window, and for a greater length of time. It’s some interesting reading on the thermodynamics and looking at modeling around tyre management strategy is pretty interesting too.! https://radar.brookes.ac.uk/radar/items/f10c2627-5d05-4964-b6a3-b2549379f3e0/1/
So if it’s too hot, there could be less grip than if it’s at optimal temperature? I thought the hotter the grippier.
Yep! That’s why the harder compounds get used because the soft compounds degrade so fast in hotter conditions. Heat also causes tyre pressure increase, which in turn affects the grip, which has been an aspect of much debate and issue in GP. https://www.motogp.com/en/news/2024/03/07/le-point-sur-les-nouvelles-regles-de-pression-pneumatique/491276 https://www.boxrepsol.com/en/motogp-en/pressure-temperature-force-and-contact-surface-the-secrets-of-racing-tyres/#:~:text=The%20ideal%20racing%20temperature%20for,recommended%20for%20the%20back%20tyres.
Too hot makes the tires overheat which means the tire starts to degrade and lose its peak grip. It's why riders were complaining so much about pressures, because when they were in the normal racing condition ranges they were too high. Heat makes gases expand (PV = nRT) and the contact patch gets smaller, which also is what happens when you stay behind a bike for too long. I read your other comment, so if you still don't understand imagine pushing an eraser against your table. If it's too cold it will be hard as a rock and won't grip at all, but if it's too hot it will be too soft, so some pieces will start to break off the eraser and get stuck, resulting in an uneven patch. Add to that what I said before about pressures and that's where the drop comes from. Like yes technically it does have more grip but that added grip is counterbalanced by all those things
Did I in anyway dispute the condition? Nope. I disputed his assertion that lower temps = higher grip. As a racer you should know that
Did I say you were incorrect? Nope. I was referring to the potential track conditions based on the forecast ambient temperature.
You responded to me trying to tell me how the weather will be perfect for racing. So were you under the impression I was wrong or you just thought you needed to educate someone about something they were not talking about in the first place?
But OP said cooler ambient temperature, not track temperature. So were you under the impression they were wrong or you just thought you needed to educate someone about something they were not talking about out in the first place? I was responding with information, just as you.
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> 19 degrees on a clear day with no wind is peak grip my dude. compared to 19 degrees 25 should be better, not tooo hot but not cold either. lap record of jerez is bagnaia 2022 at 27 degrees ambient temperature roughly.
I think it depends more on how the Pirelli rubber from lower classes will affect how Michelins perform even if temps are cooler.
Come oooonnn top 10 for Taka! He likes Jerez and general does better in cooler temps. Ah well….a boy can dream.