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Old 01-08-2013, 10:19 AM   #15
FINALLYSATISFIED
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30 cold... I like it a bit squishy. They climb to about 34 with a few minutes of interstate driving.
You running yours through the winter?
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Old 01-08-2013, 10:30 AM   #16
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You running yours through the winter?
Here in New Orleans we have no winter to speak of... it is like 55 today.
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Old 01-08-2013, 10:52 AM   #17
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Here in New Orleans we have no winter to speak of... it is like 55 today.
Ah. Must be nice!
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Old 01-08-2013, 04:58 PM   #18
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You running yours through the winter?
I didnt buy my 1LE to be a garage queen, I bought this car to drive everyday. Well except in the snow or ice..
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Old 01-08-2013, 09:33 PM   #19
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Interesting, I hadn't checked the owners manual as I'm out of town for a few days. Thanks for the info! With 32psi being the recommended pressure now I'm curious to know why the max is 51psi for the 285/35/20 OEM tires 51psi is just insane.

51psi is the max pressure the tire can withstand without leaking. You go over that it will leak air.

Don't run 45 in the rear, 2-4 psI cold will cause enough difference to notice. You can lower front to 30, rear to 34 for example. will not impact tire pat h as much.
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Old 01-08-2013, 10:40 PM   #20
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...and the first crashed 1LE is in ....3....2......1....seconds after you enter the first turn on the street with cold tires
Not for someone who knows what they are doing. Sreet tires are not that sensitive to air pressure changes.
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Old 01-09-2013, 08:55 AM   #21
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Not for someone who knows what they are doing. Sreet tires are not that sensitive to air pressure changes.
Maybe dogging cones (J/K those were my roots too.)

For the sake of the general public (the majority here) I do not recommend anyone try a 13psi higher pressure in the rear tires of a high HP rear drive car during the coldest part of the year on a summer tire only. I would venture to guess 95% that will read this have yet to turn a lap in a lot or on a track in their respective cars.

Your suggestion for "someone who knows what they are doing" applies to the other (est.) 5%.......And if they know what they are doing they are not coming on here asking for advice about what pressure to run in there car on the street.

Edit: To answer the OPs question, I would run what the OEM recommends as the pressure for normal street driving. Very general rule of thumb: Higher in the rear will help the car "rotate" (over steer) while lower PSI in the front will help the front tires turn in (traction)......Again that is general as tire design, side wall, rim width, suspension all come into play.

15 years as a road course driving instructor, chief driving instructor and road racer with track records in my classes has led me to my opinions in regards to car set-up....

-Matt

Last edited by Dropspeed; 01-09-2013 at 02:32 PM.
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Old 01-09-2013, 05:54 PM   #22
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Maybe dogging cones (J/K those were my roots too.)

For the sake of the general public (the majority here) I do not recommend anyone try a 13psi higher pressure in the rear tires of a high HP rear drive car during the coldest part of the year on a summer tire only. I would venture to guess 95% that will read this have yet to turn a lap in a lot or on a track in their respective cars.

Your suggestion for "someone who knows what they are doing" applies to the other (est.) 5%.......And if they know what they are doing they are not coming on here asking for advice about what pressure to run in there car on the street.

Edit: To answer the OPs question, I would run what the OEM recommends as the pressure for normal street driving. Very general rule of thumb: Higher in the rear will help the car "rotate" (over steer) while lower PSI in the front will help the front tires turn in (traction)......Again that is general as tire design, side wall, rim width, suspension all come into play.

15 years as a road course driving instructor, chief driving instructor and road racer with track records in my classes has led me to my opinions in regards to car set-up....

-Matt
I cant help it, its the autoxer in me. Lol
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Old 01-09-2013, 06:11 PM   #23
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Old 01-09-2013, 06:34 PM   #24
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I run 34lbs PSI cold. Cold being 50° outside, with the cement driveway at 41° (checked it with my laser thermometer)..

@ 34lbs PSI the tires will get to 38lbs PSI at highway speeds.. @ 38 lbs PSI I am getting what I consider to be the best performance from the tires, both in terms of grip and MPG.
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Old 01-13-2013, 08:40 AM   #25
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Originally Posted by Dropspeed View Post

Edit: To answer the OPs question, I would run what the OEM recommends as the pressure for normal street driving. Very general rule of thumb: Higher in the rear will help the car "rotate" (over steer) while lower PSI in the front will help the front tires turn in (traction)......Again that is general as tire design, side wall, rim width, suspension all come into play.

15 years as a road course driving instructor, chief driving instructor and road racer with track records in my classes has led me to my opinions in regards to car set-up....

-Matt
Don't take this as to use tire pressure for adjusting under/oversteer for handling changes on the track. There are proper methods for doing this. You want as much contact surface on the ground as possible. Since the 1LE is running some expense rubber, I would invest in a handheld pyrometer (can be had for $60 and more) and log your tire temps when you track. Ideally you want even temps across the outside, middle, and inside tread. Adjusting tire pressures affect this as well as your alignment settings, and other factors as Matt points out.

You need to pay attention to how your tires are working or you'll wind up wearing them unevenly and replacing more often. The occasional track guy doesn't need to sweat this, more for the hardcore guys. But those guys already know this stuff. This is more of advice for those who decide they want to use the 1LE like it was designed for and have never done this before.
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