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      03-03-2010, 09:50 PM   #1
ScheerSpeed
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Nitto NT01 tire pressures

hey guys,

what cold tire pressures are you guys running in your Nitto NT01 or similar R-comp tire? im going to be running a square 275/35/18 all around

thanks!
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      03-03-2010, 10:14 PM   #2
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Cold tire pressures are irrelevant as it's completely dependent on the outside temperature, and how hard you can push the tires when you drive.

For hot tire pressures you should be between 35-40. That's coming in to the pits with no cool down lap HOT.

You're not racing, just guess 10-15 degrees or so off your desired hot temperature for the first session of the day. Your first session should be a calmer warm up anyway. Then dial your tires in from there.
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      03-03-2010, 11:10 PM   #3
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http://www.m3post.com/forums/showpos...1&postcount=90

i posted this in the R Compound Forum

I think cold temputures are more accurate than hot tempertures

i run 33psi Cold Around 70 degrees
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      03-03-2010, 11:23 PM   #4
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Get a pyrometer. It will change based on a lot of factors.
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      03-04-2010, 01:39 PM   #5
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Quote:
Originally Posted by Splinter4784 View Post
http://www.m3post.com/forums/showpos...1&postcount=90

i posted this in the R Compound Forum

I think cold temputures are more accurate than hot tempertures

i run 33psi Cold Around 70 degrees
What do you mean by "accurate"?

What you care about is how the tire behaves when you are driving, not when it is sitting in the lot; the temperatures and pressures the tire will experience while driving is a factor of several variables. Cold tire temperature and pressure are just two of those variables.
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      03-04-2010, 07:15 PM   #6
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i know the difference between cold vs. hot... i just need to know around what psi i should set them at before starting my first session. after that i make the judgements depending on how long they last before overheating and getting slippery
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      03-04-2010, 07:38 PM   #7
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Quote:
Originally Posted by ScheerSpeed View Post
i know the difference between cold vs. hot... i just need to know around what psi i should set them at before starting my first session. after that i make the judgements depending on how long they last before overheating and getting slippery
I start at 30 cold, any less and the first lap is sketchy and an increased risk of damaging a wheel or tire if you run off. I shoot for 38 hot with NT01s, I recall the working heat range is around 180F, they don't work so good over 40psi or 200F.
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      03-06-2010, 11:18 AM   #8
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thanks!
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      03-06-2010, 02:56 PM   #9
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Quote:
Originally Posted by ScheerSpeed View Post
thanks!
Summer I start with 30, winter (40s) I start with 27.
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      03-04-2014, 08:03 PM   #10
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Based on advice here, I have always run these nitto's @ 38 hot at the track despite all the locals giving me weird looks and telling me that's far too high.

Last time I was out, I was chatting with a ex race driver and he looked at my tyre wear and recommended I try 34 hot. It was day and night difference. So I actually ended up dropping down to 32 hot and it was far far better in corners. It was also an extremely hot day.

After all the years of running 38 hot on these tyres, I just thought I'd share my experience.
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      03-04-2014, 08:10 PM   #11
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I usually set them at 28-30 cold and bleed some off to try and hit 35 hot. I too was running 38-40 and found that 34-36 is way better with nt01s.
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      03-04-2014, 08:23 PM   #12
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Are you doing pbir this weekend? It'll be my first event on nt01 also so helpful thread!
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      03-04-2014, 08:30 PM   #13
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Quote:
Originally Posted by 1MOREMOD View Post
I usually set them at 28-30 cold and bleed some off to try and hit 35 hot. I too was running 38-40 and found that 34-36 is way better with nt01s.
Me too. I start at 28 cold and shoot for 34 hot (in pits after cool down lap).
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      03-04-2014, 08:59 PM   #14
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Quote:
Originally Posted by chili cheese View Post
Me too. I start at 28 cold and shoot for 34 hot (in pits after cool down lap).
I would say the change in pressure was worth at least a second a lap.
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      03-04-2014, 09:11 PM   #15
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I saw a lot of pressure creep on my E90. I usually start 8psi below my target hot pressure. So I'd start at 28psi and end up around 35-36psi.
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      03-05-2014, 06:08 PM   #16
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Quote:
Originally Posted by 1MOREMOD View Post
I would say the change in pressure was worth at least a second a lap.
Yep, I made that change and it was a big difference in grip!
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      03-05-2014, 06:31 PM   #17
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Quote:
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Yep, I made that change and it was a big difference in grip!
Stupid me believed everyone telling me 39 for over a year!
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      03-05-2014, 06:47 PM   #18
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Going to have to try for 35-36 next time then. I ran 37/38 this past weekend and it felt great for the most part. Couple of weeks will give it a shot and see if it helps.
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      03-05-2014, 07:24 PM   #19
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Quote:
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Going to have to try for 35-36 next time then. I ran 37/38 this past weekend and it felt great for the most part. Couple of weeks will give it a shot and see if it helps.
It will. To me it felt like a tire upgrade.
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      03-05-2014, 07:39 PM   #20
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Quote:
Originally Posted by 1MOREMOD View Post
It will. To me it felt like a tire upgrade.
looking forward to it! hopefully I can get close to a 2:30 flat a sebring, which is respectable.. 2:28-2:29 would be great.
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      03-06-2014, 09:01 AM   #21
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Quote:
Originally Posted by Splinter4784 View Post
http://www.m3post.com/forums/showpos...1&postcount=90

i posted this in the R Compound Forum

I think cold temputures are more accurate than hot tempertures

i run 33psi Cold Around 70 degrees
You're really only concerned about hot pressures, which is where you're tire is operating at. The delta between cold and hot will vary throughout the day so making sure your operating pressure is correct is more important than your starting point.

For a heavy e92, I'd shoot for 36-40psi hot and use a probe type pyrometer to see how your pressures and alignment is working the tire and adjust accordingly.
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      03-06-2014, 11:35 AM   #22
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28-30 cold...as the day and track temp warms i will slowly drop psi based on what hey are at right after i come in...and how hot the day gets...
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