Honey Badger
...iz a girl
:bananaI signed up for PTTs NRS July 23:banana
I will likely see you then! Be sure to say hi - Mr. Butler (who teaches the NRS for us) will definitely get you all the info you need :thumbup
:bananaI signed up for PTTs NRS July 23:banana
I thought about it but I have ken hill school on june 19/20 so I wanted to be rested up and I cant make rd4 as I'll be pit crew for my friends chump race at Laguna that weekend...
:bananaI signed up for PTTs NRS July 23:banana
The 2:00pm session yesterday destroyed the left side of my tire. It was the ONLY session of the day with the sun out and the track actually absorbed some heat about half way through the session.
:mad
Did you check/adjust your pressures throughout the day? A lot of people were tearing tires, but I stayed ontop of my pressures and didn't have any issues.
I check them every session before heading out. That session in particular started off cool and overcast, but the cloud cover baked off after being on the track, which resulted in a spike in track temperature.
I still want to hear about the temp gun usage.
What about right after every session? Not saying you could have saved the tire but I am under the impression that it's a good idea to check pressures fresh off the track when they are highest
Yeah.... but I have no idea how to use that information to set pressures before heading out. Knowing the hot off the track pressure is great, but how do you use that to set the pressure before putting heat in the tire?
Also, I don't have any pit crew to help check pressures right as I roll into the pit. If I did it myself, the tire would cool considerably after I rolled into the pit, put the bike on the stands, and then took my gloves off to manipulate the pressure gauge.
The tire isn't so bad that I can't heal it. Plus, I'll need a new front and rear before Round 4 anyway so I'm not too worried about it. Tires are a consumable good and won't last forever.
theres nothing that can be said for certain to correlate track temp and tire pressure. everyone rider/bike/track combo is different and will "work" in a diff range of conditions. until u tabulate data for yourself and see what actually works, itd be hard to correctly predict any necessary changes.
for most, theres no point in check hot-off-the-track pressure. most ppl dont have a probe to check carcass temp. manufacturers dont publish operating temps and dont correlate that with pressures. a lot of riders cant generate 100% of the required heat. riders are lazy when it comes to checking and get bad readings. hot pressures should change w/ conditions. the list goes on and on as to why it doesnt work.
at least with tire warmers, u know your tire is within 20F of a temp & pressure combo that the manufacture recommends so that u can actually set the pressure. but surprise... sometimes even those pressure recommendations are wrong. Dunlop tells all their trackday vendors that tire-warmer pressure should be 23psi. but that isnt anywhere close to what anyone races nor what the Dunlop race techs at MA events tell ppl to run.
Dunlop tells all their trackday vendors that tire-warmer pressure should be 23psi. but that isnt anywhere close to what anyone races nor what the Dunlop race techs at MA events tell ppl to run.
Curious what Dunlop techs recommend. I run my Michelins at 30/21.5 and Michelin recommends 30/22.
theres nothing that can be said for certain to correlate track temp and tire pressure. everyone rider/bike/track combo is different and will "work" in a diff range of conditions. until u tabulate data for yourself and see what actually works, itd be hard to correctly predict any necessary changes.
for most, theres no point in check hot-off-the-track pressure. most ppl dont have a probe to check carcass temp. manufacturers dont publish operating temps and dont correlate that with pressures. a lot of riders cant generate 100% of the required heat. riders are lazy when it comes to checking and get bad readings. hot pressures should change w/ conditions. the list goes on and on as to why it doesnt work.
at least with tire warmers, u know your tire is within 20F of a temp & pressure combo that the manufacture recommends so that u can actually set the pressure. but surprise... sometimes even those pressure recommendations are wrong. Dunlop tells all their trackday vendors that tire-warmer pressure should be 23psi. but that isnt anywhere close to what anyone races nor what the Dunlop race techs at MA events tell ppl to run.
Adding pressure as the surface temp increases seems exactly the opposite of what you'd want to do.
:dunno
Daredevil, who told u that 200F carcass temp was too hot? i know that MA SBK guys run >260F on hot days. ya Dunlops vs Bridgestones, but im surprised that your operating temp would be so low. perhaps im conflating carcass temp and surface temp.
are u purposefully trying to maximize tire wear? have u tried maximizing grip instead? are there 2 diff pressures for these and if so, how far apart are they on avg?
do u have data on what doesnt work? like, if its 120F track temp at THill, do u know that 26R tears but 27R wont?
Adding pressure as the surface temp increases seems exactly the opposite of what you'd want to do.
:dunno
it does seem counter intuitive...but adding pressure decreases tire flex which decreases carcass temps...or at least that is my current understanding