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Old 08-21-2009, 08:00 AM   #1
Tom S.
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Question about tire pressure monitor systems.

We got our TST system today and it was very easy to hook up. I set 75 lbs as a low warning, but I don't know what to use for the high pressure warning. Any suggestions? Same thing for the temps - what is considered high temps for a tire?

I'm going to try Googling for answers and if I find out anything, I come back and post it.
 
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Old 08-21-2009, 08:30 AM   #2
Art-n-Marge
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I don't have a TPMS yet, but I am very curious to know what the settings should be when I do get one. There isn't any indication in the manual? I hope you find something to post. This would be a good "Table" to add to the Forum homepage with these becoming more prevalent for tire pressure and temperature.
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Old 08-21-2009, 11:22 AM   #3
NCFischers
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I just got mine today also. I won't get to play with it until Sunday. Let us know what you find out. I'm not sure what the high level should be for the temp.
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Old 08-21-2009, 11:29 AM   #4
ols1932
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The Pressure Pro System low pressure warning is a a percentage of what the cold pressure is when you first set up the system. I believe it is 12% but I could be wrong. Possibly Pat McFall will be along to give us the straight scoop.

Orv
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Old 08-21-2009, 11:53 AM   #5
H. John Kohl
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I set the high pressure for 15 pounds over the desired pressure. Temperature does not make much difference because the low alarm point is about 147 degrees, I think. Manual is in the trailer. I did change the temperature reading to C instead of F. The 80 degree temp and 80 pounds pressure are too confusing so the C temp reading makes it much easier.

I did set the low pressure 10 pounds below desired pressure. When we got to the cooler temps in WI and MI the tire dropped below the 75 pound alarm point when 80 was desired pressure.



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Old 08-21-2009, 12:36 PM   #6
Tom S.
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The only info I've found so far was in regard to either race cars or high performance street cars. For street cars, the "low end of range was 165 and the high end around 200 degrees (the higher end varied from site to site). I set mine for 120. I couldn't find squat for pressure range - yet. I set mine for 75 low and 110 high, but I have nothing to back those numbers!

The system is actually geared to 18 wheelers - case in point, the display shows a truck/tractor and trailer combination (the only thing I can complain about), and the manual shows the system comes preset for 100 psi low side, 175 psi high side and a high temp of 158 degrees(F).
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Old 08-21-2009, 01:12 PM   #7
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When I talked to Doran about there product, I was told that they set the high pressure at 20%, because that is what the tire manufacture rate their tires for.
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Old 08-21-2009, 06:45 PM   #8
MAMalody
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PP default setting for high pressure is 128% increase over the base set. It can be adjusted to 6 different over pressure settings.
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Old 08-22-2009, 01:05 AM   #9
Champ_49
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The answer to tire temps is at 235 degrees the tire will start to basicaly melt down. 145 to 165 is optimal as far as I can tell. While racing cars this was checked imediately after every race. The one thing you have to remember is that as the tire gets hotter it also gains in tire pressure. But then again I was using bias ply tires. I wonder if the radial is different?
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Old 08-22-2009, 10:56 AM   #10
2007dura
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When I talked to rep from TST when I ordered mine, he said Michelin recommends 10% of tire PSI for high and low. Trailer tires are 110#, so I am going with 100# low, 120# high.
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Old 08-22-2009, 01:53 PM   #11
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Quote:
quote:Originally posted by 2007dura

When I talked to rep from TST when I ordered mine, he said Michelin recommends 10% of tire PSI for high and low. Trailer tires are 110#, so I am going with 100# low, 120# high.
Kind of nit-picking here, but at 110 PSI, 10% would be +/- 11 PSI.

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Old 08-22-2009, 03:30 PM   #12
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On our (new) Pressure Pro system the alarm was going off when we reached 92 PSI in New Mexico and 95 degrees.. Our tires are set at about 80 PSI so we followed the instructions to click up nextto the level and it has been perfect... I would say we are now set at about 95 psi on the high side. We hope not to get down to check the cold side of it if possible.

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Old 08-23-2009, 12:31 AM   #13
Tom S.
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Quote:
quote:Originally posted by 2007dura

When I talked to rep from TST when I ordered mine, he said Michelin recommends 10% of tire PSI for high and low. Trailer tires are 110#, so I am going with 100# low, 120# high.
That's good info to have. For 80 lbs then, high and low would be 88 and 72. Using the 1 pound of change per 10 degrees of difference and 70 degrees as a baseline, 150 degrees would correspond to 88 pounds of pressure. So that's what I'll set my pressure warnings and temp warning to.

Thanks!
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Old 08-24-2009, 06:39 AM   #14
ChuckD
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Tom S, I hope you got your answers, because they just gave me a whole bunch of GOOD answers by just reading this thread. I picked up my new TST Saturday from Camping World and they matched the internet price of $399. for 8 wheels. I did have to pay the sales tax, but thats okay I had the unit in hand to look over before I invested 400 bucks. Now I need to program the limits discussed here.... Chuck
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Old 08-24-2009, 12:56 PM   #15
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Just for interest, the GM dealer told me that the Sierra has a TPMS in it (in response to my question, referred to in the manual), but the range is set wide because of the variety of loads and pressures that are carried.
Adelmoll, I notice that Nunavut isn't filled in on your Canadian map. Maybe you'll have to brave the cold again?
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Old 09-03-2009, 02:12 AM   #16
H. John Kohl
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Quote:
quote:Originally posted by Tom S.

We got our TST system today and it was very easy to hook up. I set 75 lbs as a low warning, but I don't know what to use for the high pressure warning. Any suggestions? Same thing for the temps - what is considered high temps for a tire?

I'm going to try Googling for answers and if I find out anything, I come back and post it.
Day before yesterday I balance all the tire pressures on RED (TV) and the outside temp was 70 degrees. Yesterday I check them early morning with the outside temp at 50 degrees. All 7 tires had dropped FIVE pounds, based on the 20 degree difference of outside temperature. I then aired Monty's tires up to 80 pounds with the temp at 50 or so degrees. Later that day I made a trip to the service center and my alarm went off. High pressure. I had my alarm set at 15 pounds above desired pressure and the tires had gone to 16 pounds with the outside temperature at about 70 to 75 and of course road heat. I am now setting the hi pressure at 20 pounds above desired temperature.
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Old 09-03-2009, 02:12 PM   #17
adelmoll
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On the Pressure Pro System the factory pre-sets them at 24% but you have the option of going down to as low as 10% and as high as 45%... The manual is very clear on this... We just installed new tires that we have set at 97psi and have reset the limits to 14% increase or decrease. They take a few minutes to reprogram but are not hard to do at all.
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