TIRE PRESSURE Checking Frequency

Three Pedal Steve · 01-29-2016, 10:33 PM

I used to be fanatical about checking tire pressures daily. But with these PSS tires on my M3 DD, there is little change weekly. So I have three questions-
1. How often on my DD?
2. Tolerance? + or - 1 psi?
3. When auto-crossing is pressure checked on each pass? How is a pyrometer used to achieve proper pressure?

I guess that was 4 questions. Thanks for some conversation on this.

///WeissBisBlau · 01-30-2016, 10:58 AM

Quote:

Originally Posted by Three Pedal Steve

I used to be fanatical about checking tire pressures daily. But with these PSS tires on my M3 DD, there is little change weekly. So I have three questions-
1. How often on my DD?
2. Tolerance? + or - 1 psi?
3. When auto-crossing is pressure checked on each pass? How is a pyrometer used to achieve proper pressure?

I guess that was 4 questions. Thanks for some conversation on this.

Hmmm...well it is definitely different--for me--between checking psi on a dd vs checking it on mine, which is essentially a weekend warrior now. If I was daily driving her still, I dunno, maybe once every week or two? As it is now, I have fallen into the check it every time before I take her out camp. If I find that the pressure is down 1 or 2 psi, I'll probably just equal out the pressures so that the ride is consistent, but any more than that, and I will probably top her up. I don't really know how to answer your other questions, as I do not auto-cross. My main thing is just to make sure she has enough air, and that the ride is smooth.

cenix · 01-30-2016, 12:13 PM

The general idea behind using a pyrometer is to see which parts of the tire are working harder. For example, if you are seeing a large difference in temps between the outsides and insides of the tire, you can adjust tire pressures to help even out temps so that more of the tire is working for you on the track. Of course, this is just a small piece of the puzzle because suspension components and camber settings also play a significant role in these things, too. But that's the basic gist of it.

Hope that helps a little.

01-29-2016, 10:33 PM	#1
Three Pedal Steve Captain 875 Rep 611 Posts Drives: 2013 M3 coupe' 6mt Join Date: Apr 2013 Location: Under a Waterfall in Highlands NC iTrader: (0) Garage List 2013 BMW M3 Coupe [0.00]	TIRE PRESSURE Checking Frequency I used to be fanatical about checking tire pressures daily. But with these PSS tires on my M3 DD, there is little change weekly. So I have three questions- 1. How often on my DD? 2. Tolerance? + or - 1 psi? 3. When auto-crossing is pressure checked on each pass? How is a pyrometer used to achieve proper pressure? I guess that was 4 questions. Thanks for some conversation on this. __________________ memories: '71 2002 (new), '72 Bavaria, '74 2002tii, '00 540i Sport
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01-30-2016, 12:13 PM	#3
cenix Captain 379 Rep 875 Posts Drives: E90 M3 ZCP Join Date: Oct 2011 Location: SoCal iTrader: (5)	The general idea behind using a pyrometer is to see which parts of the tire are working harder. For example, if you are seeing a large difference in temps between the outsides and insides of the tire, you can adjust tire pressures to help even out temps so that more of the tire is working for you on the track. Of course, this is just a small piece of the puzzle because suspension components and camber settings also play a significant role in these things, too. But that's the basic gist of it. Hope that helps a little.
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