Tire Temperature Display
#1
Le Mans Master
Thread Starter
Tire Temperature Display
While enroute to Las Vegas today the outside temperature reached 107. I happened to check the tire temperature display it showed tires as "HOT".
I assume given the outside temperature and an asphalt road this reading is normal?
Hot is typical for aggressive driving.
Tire pressure readings where 42psi. When cold reading are 35psi.
I assume given the outside temperature and an asphalt road this reading is normal?
Hot is typical for aggressive driving.
Tire pressure readings where 42psi. When cold reading are 35psi.
#2
Le Mans Master
Corvette recommends 30 psi cold.....tires showed "hot" because you already started out _warm_.....
#6
Safety Car
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Originally all the Corvettes had tire psi at 30 cold on the door jam.
Then at one point/new model year, the base Stingrays came with tire psi at 35psi on the door jam.
GM did it solely to meet mileage ratings.
IMO tire psi at 35 cold is too high and not needed.
YMMV
Then at one point/new model year, the base Stingrays came with tire psi at 35psi on the door jam.
GM did it solely to meet mileage ratings.
IMO tire psi at 35 cold is too high and not needed.
YMMV
#7
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That seems very high comparing to my temps here in AZ. I keep 35 lbs in them. For example when it is a 115 degrees or so the pressure reads 39. I have never seen them over that. And that is moving along at about 90 mph.
(When I am in Mexico where the roads are straight and I am traveling along in triple digits the tires still don't see anything over 39.)
PM me if you want to stop by if you get around Lake Havasu.
(When I am in Mexico where the roads are straight and I am traveling along in triple digits the tires still don't see anything over 39.)
PM me if you want to stop by if you get around Lake Havasu.
#8
Melting Slicks
I run 26 PSI cold in the CA central valley... Normal pressure peaks about 32-34 with a good ride...
On the drive to Spring Mountain, outside air temp in the desert was 116 and the tires showed 35 psi.
On the drive to Spring Mountain, outside air temp in the desert was 116 and the tires showed 35 psi.
#9
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2023 C8 of the Year Finalist - Unmodified
Here in SoCal (Palm Springs) where its been averaging 115's lately I keep my cold temp at 30psi (sunrise / temp lows 85F).....By mid afternoon my pressures are 34~35psi with 115F ambient temps...
#10
Safety Car
but just wondering (which I tend to do)... does anyone know what temp is considered cold vs warm vs hot? GM must have some values plugged into the system to trigger the change in the display.
#11
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My '01 says "30psi" and my '18 says "30psi" and I measure by gauge.
I could not imagine running 35psi!!!
I could not imagine running 35psi!!!
#12
Intermediate
42psi is definitely too high. Too much pressure can strain the sidewalls of your tire and cause excessive wear in the middle of tire. You also lose grip at higher pressures. I believe 38 psi hot is ideal for track from what I have read. Would recommend 30 psi cold...both the door and chevy app recommends 30. I know some folks run a little lower for a "softer" ride.
#13
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I'm curious why you can't imagine running 35 PSI? Stiff ride? Grip?
#14
While enroute to Las Vegas today the outside temperature reached 107. I happened to check the tire temperature display it showed tires as "HOT".
I assume given the outside temperature and an asphalt road this reading is normal?
Hot is typical for aggressive driving.
Tire pressure readings where 42psi. When cold reading are 35psi.
I assume given the outside temperature and an asphalt road this reading is normal?
Hot is typical for aggressive driving.
Tire pressure readings where 42psi. When cold reading are 35psi.
I'm interested in the ride. Did the tires ride different? Mine seem to when it gets hotter "only" been 95 here.
#15
#16
Safety Car
Last edited by JMII; 08-14-2018 at 05:15 PM.
#17
Le Mans Master
Thread Starter
#18
Le Mans Master
Thread Starter
#19
Drifting
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From Edmunds.com:
======================================
"Integrated Tire Temperature/Chassis Controls
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science, but it is one that data modeling can largely overcome. And it's one more piece of information that can be utilized to enhance the driving experience.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly."
==================================
So, as per the above, it may be inconsequerntial information to display to the driver, however the data is used by the systems on the car. Frankly I would have preferred to see the actual computed temperatures displayed rather than the classifications of cold, warm, hot etc.
Turns out these numeric temps can be viewed if you have a PDR and download the Cosworth Toolbox to your PC. Run your PDR video into the Cosworth software and numerical tire temps can be seen in the toolbox display screens.
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#20
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St. Jude Donor '15-'16,'18
Since I have a '16, OnStar keeps sending me messages that my tire pressure is low if it's below 35 psi (cold). I agree that's too high. 30-32 (cold) is what I prefer.