Has anybody been able to get their tire temp to indicate "Hot"? I have been unsuccessful on the street, it was 92 degrees today. I took the car through a very twisty road that's 7 miles long, and still can't get them to show hot. I checked the tire temp on one of the front tires as soon as I could pullover the hottest part of the tire was 137 degrees. From what I understand you cannot reach 100% throttle until the tire temps indicate hot. I would also like to know at what tire temp the indicator turns to hot, or is it a strategy of air pressure increase from initial pressure?
Thanks for any input

 

I have seen it say "HOT" at the track but have no idea what temp. triggers it.

 

You can't drive the car fast enough for a long enough time to get the tires up to the hot setting. If you are running a track capable tire like the Hoosier R6 the hot temps are in the 180 to 200 degree range, if you are running a Kumho A710 the hot temps are in the 210 to 240 range.

Bill

 

Mine read "Hot" at the end of my last autocross event.

Most of the day they were the usual "Warm". However, after the competition, the track was opened for fun runs - which means that after a run you just get back in line and go again as soon as your turn comes. The tires seemed to perform MUCH better at hot than warm. (It could be I was just getting more familiar with the course...but honestly, I think it was the tires.)

 

keep in mind the car can't see the temp of the tread, just the temp of the microprocessor in the tpms......this will probably have to be hotter than the tread by quite a bit....unless of course they factored that in which would make the tread temp a hypothetical calculation.

not a feature of the car I would be looking at.....tire pressure wins that one.

 

Thanks for all the replies, eventually we will learn of the exact criteria required to get the dash to show the tires "HOT". If it is true in fact that the throttle is not allowed to go to 100% until the tires show hot. I do not know if a handheld tuner defeats this or not? That is my main concern.

 

I get 100% throttle at all tire temps. The traction control is more aggressive/intrusive the colder the tires are....that is not the same as "getting less than 100% throttle.

All you have to do is turn off traction control and it won't interfere....of course there is always torque management and that is not connected to tire temps. Two different things.

 

Higgs,
I still struggle a bit with the difference between traction control and torque management. Is there a short answer as to how each operates? Thanks.

 

think of it like this:

traction control is a tangible system that the driver can sense and control in a direct manner. it is designed to prevent wheel spin during conditions where it is or may be present. it can be disabled as a system. active handling takes it further with yaw sensors and the ability to prevent spinning out or fish tailing. basically taking traction control to a more advanced level. it can also be turned off, usually independent of regular, straight line, traction control.

anti lock brakes are kind of like traction control in the other direction.....cannot be turned off in most car including the vette.

torque management is more of a control system for the ECM and TCM. it is a method or logic almost for control of the powertrain systems. it can be integrated into traction control events but can also control how power is applied or removed during all aspects of power production and vehicle motion. from idle control, throttle control, transmission shifting control, electronic systems failure car control.....basically everything is subject to some form of torque management. it is a more general term for computer control in the sense of power delivery to the wheels.

before the E92 (vette) and E78 PCMs, torque management started showing up in the form of pulling timing or limiting throttle opening during auto trans shifting or clutch protection or powertrain protection in the form of limiting power through spark timing and throttle opening. now it is even more advanced. torque based idle control, trans control, throttle opening, basically everything now is controlled by:

driver demands a power level with the throttle pedal
computer decides what to do with it

tuning is now as much about altering the logic of the computer as it is about setting the air fuel ratios and optimum spark timing and cam timing.

in many ways it is better. when the computer has more control over the powertrain, so do we....as long as we know what it all means.

check out this link to see more about current gm tq mngmt
https://www.hptuners.com/help/vcm_ed...vanced_e78.htm


edit....sorry for the redundancy, on the ipad and editing is not worth the time.

 

Thanks Higgs. Clear and succinct.
Damn, these modern cars sure are sophisticated.