Tire Temperature System
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Joined: Mar 2009
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From: Westchester/Fairfield County
A good friend of mine is a pro tire guy, supports some serious teams. After having many talks with him about it I've basically given up on taking temps unless it's done by someone else in the pit lane. By the time you get out of the car or leave out for paddock tire temps will have already dropped.
Somewhat related to the production comment, I was shocked when the TPMS went off on our new X5d and it actually shows the pressure per tire to the 10th!
Somewhat related to the production comment, I was shocked when the TPMS went off on our new X5d and it actually shows the pressure per tire to the 10th!
Joined: Jul 2012
Posts: 103
Likes: 48
If you are going to measure tire surface temperatures, datalogging is absolutely essential. Tire surface temperatures change far too rapidly for a "realtime" display to be useful.
I've already started measuring the lateral surface temperature of my tires using a 16x4 thermopile array. I feed the IR data into a race-technology DL1 data logger via a serial stream in realtime. What nice is the tyre temperature data is synchronized with all the other data (e.g., lat. accel, long. accel., TPS, etc.).
Here is some sample data from VIR for turn 1 and 2. S2000 with NT-01 tires. Surface tire temperature of left front tire, averaged into 4 temperatures bands. Note how rapidly the tire temperature changes, delta T of 80 F in ~2 seconds! To further complicate things, the steering shifts the tyre measurement location and that MUST be taken into account. There is a LOT to take away and learn from all this data (e.g., sufficient camber? enough tire temperature? too much toe? front vs. rear balance? left vs. right balance? how to effectively put heat into tires?, etc.)
Caleb
I've already started measuring the lateral surface temperature of my tires using a 16x4 thermopile array. I feed the IR data into a race-technology DL1 data logger via a serial stream in realtime. What nice is the tyre temperature data is synchronized with all the other data (e.g., lat. accel, long. accel., TPS, etc.).
Here is some sample data from VIR for turn 1 and 2. S2000 with NT-01 tires. Surface tire temperature of left front tire, averaged into 4 temperatures bands. Note how rapidly the tire temperature changes, delta T of 80 F in ~2 seconds! To further complicate things, the steering shifts the tyre measurement location and that MUST be taken into account. There is a LOT to take away and learn from all this data (e.g., sufficient camber? enough tire temperature? too much toe? front vs. rear balance? left vs. right balance? how to effectively put heat into tires?, etc.)
Caleb
Joined: Jul 2012
Posts: 103
Likes: 48
It's just an example, not a comprehensive analysis. I have over 80 laps of data.
Front tire pressure is okay but there's insufficient negative camber. "RF Outside 2" (the far outside location) is not quite right, likely caused by a misalignment in the sensor and/or unaccounted tire flex.
Front tire pressure is okay but there's insufficient negative camber. "RF Outside 2" (the far outside location) is not quite right, likely caused by a misalignment in the sensor and/or unaccounted tire flex.
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dcdomain
S2000 Under The Hood
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Jan 11, 2013 10:54 AM