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2012-2013 Boss 302 Mustang
Finally jumping in.... Track day
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<blockquote data-quote="noldevin" data-source="post: 15581610" data-attributes="member: 166003"><p>The door jam sticker on mine says 32.</p><p>For autocross you don't have to worry about pressure increasing as much because the tires don't get enough time to heat up.</p><p>On the road course, each time I go out the pressure creeps up by at least 5 psi, sometimes 8 or 9 in the beginning of the day. You definitely wouldn't want to start at 41 in that case.</p><p></p><p>I usually start at 30 for autocross and use chalk lines on the sidewall to see if it's scrubbing.</p><p>For the road course i start at 25 and shoot for 30-35 hot, sometimes also using the chalk lines to see how far the tire is rolling over.</p><p></p><p>Ideally you want your pressure where the chalk rubs off right at the edge of the tread. I bet if you tried the chalk trick at 40 you'll find you're leaving a lot of tread unused.</p></blockquote><p></p>
[QUOTE="noldevin, post: 15581610, member: 166003"] The door jam sticker on mine says 32. For autocross you don't have to worry about pressure increasing as much because the tires don't get enough time to heat up. On the road course, each time I go out the pressure creeps up by at least 5 psi, sometimes 8 or 9 in the beginning of the day. You definitely wouldn't want to start at 41 in that case. I usually start at 30 for autocross and use chalk lines on the sidewall to see if it's scrubbing. For the road course i start at 25 and shoot for 30-35 hot, sometimes also using the chalk lines to see how far the tire is rolling over. Ideally you want your pressure where the chalk rubs off right at the edge of the tread. I bet if you tried the chalk trick at 40 you'll find you're leaving a lot of tread unused. [/QUOTE]
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2012-2013 Boss 302 Mustang
Finally jumping in.... Track day
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