Recommended valve stems for track days

dre99gsx · 03-20-2024, 02:53 PM

I've noticed these "cheap chinese/amazon" metal valve stems tend to leak after hot laps. They don't leak outright until I move them slightly side to side. I can see the rubber seal gets weak and some air escapes. Once the rim cools down, they are solid.

Can anyone recommend non-TPMS valve stems for my APEX wheels? Not a fan or standard rubber unless you can convince me...

And, preferably something I can source easily

3002 tii · 03-22-2024, 08:01 AM

I always use the shorty OEM ones (hate when they protrude) for $5. Never had issue with them over years of tracking. Works fine for with and without tpms. As you said I don’t use metal ones because they tend to be a little finicky.

https://www.ecstuning.com/b-huf-part...146792829~huf/

dre99gsx · 03-22-2024, 09:45 PM

Perfect, I'll grab me some of those. Thanks.

Michael9218 · 03-25-2024, 07:08 PM

Apex sells high quality metal valve stems. That's what I use.

Vanne · 03-28-2024, 04:21 AM

why dont you want tpms?having a readout on the dash is pretty nice.

3002 tii · 04-11-2024, 12:50 AM

Quote:

Originally Posted by Vanne

why dont you want tpms?having a readout on the dash is pretty nice.

I’d agree if it was like the newer cars where you get a readout of psi and temp by tire. But having just a binary light on/off without even knowing which sensor is the issue isn’t very informative imo.

maupineda · 04-11-2024, 07:32 AM

Z4M also uses the rotational speed to calculate low pressure tires, you can code this behavior in and still have the feature while not having actual TPS in the tires

3002 tii · 04-11-2024, 07:04 PM

Quote:

Originally Posted by maupineda

Z4M also uses the rotational speed to calculate low pressure tires, you can code this behavior in and still have the feature while not having actual TPS in the tires

I thought that was only for 06 models? Can you share the coding settings if applicable for 07-08?

maupineda · 04-12-2024, 08:23 AM

Mine is an 07. Canada spec and I confirm both options are in NCSExpert. Need to dig it out the saved files or download, but the car is on the stacker. Can look at it on the weekend

03-20-2024, 02:53 PM	#1
dre99gsx Captain 510 Rep 911 Posts Drives: 1994 Toyota Supra Join Date: Aug 2011 Location: NJ iTrader: (2)	Recommended valve stems for track days I've noticed these "cheap chinese/amazon" metal valve stems tend to leak after hot laps. They don't leak outright until I move them slightly side to side. I can see the rubber seal gets weak and some air escapes. Once the rim cools down, they are solid. Can anyone recommend non-TPMS valve stems for my APEX wheels? Not a fan or standard rubber unless you can convince me... And, preferably something I can source easily __________________ Andre - 2J into a Z4 Coupe!
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03-22-2024, 08:01 AM	#2
3002 tii Lieutenant General 2282 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.22]	I always use the shorty OEM ones (hate when they protrude) for $5. Never had issue with them over years of tracking. Works fine for with and without tpms. As you said I don’t use metal ones because they tend to be a little finicky. https://www.ecstuning.com/b-huf-part...146792829~huf/ __________________ Follow for latest mods
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03-22-2024, 09:45 PM	#3
dre99gsx Captain 510 Rep 911 Posts Drives: 1994 Toyota Supra Join Date: Aug 2011 Location: NJ iTrader: (2)	Perfect, I'll grab me some of those. Thanks. __________________ Andre - 2J into a Z4 Coupe!
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03-25-2024, 07:08 PM	#4
Michael9218 Lieutenant 595 Rep 484 Posts Drives: 2007 Z4 M Coupe Join Date: Oct 2012 Location: Woodstock, GA iTrader: (0)	Apex sells high quality metal valve stems. That's what I use.
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03-28-2024, 04:21 AM	#5
Vanne Down Under!! 1621 Rep 4,294 Posts Drives: 2007 Z4MC Join Date: Mar 2013 Location: Dubai iTrader: (4)	why dont you want tpms?having a readout on the dash is pretty nice. __________________ 2007 EuroSpec Z4///MC - Building/Developing Z4 GT3 Powered by
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04-11-2024, 07:32 AM	#7
maupineda Captain 456 Rep 975 Posts Drives: E86 Z4MC Join Date: Jul 2012 Location: Detroit, MI iTrader: (3)	Z4M also uses the rotational speed to calculate low pressure tires, you can code this behavior in and still have the feature while not having actual TPS in the tires
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04-12-2024, 08:23 AM	#9
maupineda Captain 456 Rep 975 Posts Drives: E86 Z4MC Join Date: Jul 2012 Location: Detroit, MI iTrader: (3)	Mine is an 07. Canada spec and I confirm both options are in NCSExpert. Need to dig it out the saved files or download, but the car is on the stacker. Can look at it on the weekend
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