Air pressure for road course track day - Mustang Evolution

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Old 02-13-2014, 09:04 PM   #1
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Air pressure for road course track day

I was just wondering if anybody has any advice on what to air Street radial tires for a road course track day. I'm going roadracing this Saturday and the predicted temperature is 80°.
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Old 02-14-2014, 05:36 PM   #2
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Quote:
Originally Posted by Redonblackpony View Post
I was just wondering if anybody has any advice on what to air Street radial tires for a road course track day. I'm going roadracing this Saturday and the predicted temperature is 80°.

If they're all season Pirelli's I'd only go around 34 to start and see if the tires aren't rolling on the sidewalls then be happy with it. If they are go up another pound or so but it doesn't take much to get them really squealing and sliding.

If they're good summer tires I'd basically start the same but you could head up to around 36 and be pretty happy.

REMEMBER THERE WILL BE A BIG DIFFERENCE IN TRACTION AFTER a few laps so take it easy for the first few. you don't wanna be the guy off the course or against a guard rail.
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Old 02-14-2014, 06:55 PM   #3
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I'm running the Mickey Thompson Street radial and they're nitrogen filled, so they shouldn't fluctuate too much hopefully. I'll leave them at 35 PSI to start and see if they go up from there. And yes I'm all too familiar with cold tires losing traction. I'll take it pretty easy the first several laps of the 2.5 mile track. Thanks.
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Old 02-15-2014, 06:51 PM   #4
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What track? Where?
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Old 02-15-2014, 10:01 PM   #5
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Willow Springs international Raceway. It's in Southern California just outside Rosamond, CA. I just got back from a day of road racing. What a blast!! 135MPH on the front stretch.
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Old 02-15-2014, 10:39 PM   #6
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Go around and make friends at the track and get all the solid info you need. There's almost always a tire vendor at track days. They'll be a hub of the kind of info you're looking for.

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Old 02-15-2014, 10:53 PM   #7
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It took me three sessions to get the right PSI. Tire pressure went up when tires were brought up to temperature between 4 and 8 PSI. I found that 32 PSI cold was about right.
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Old 02-16-2014, 06:32 AM   #8
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Sounds like a good time was had. Addictive, ain't it?

if I lived in a year round warm climate I'd be force to sell the house to pay for the habit LOL
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