Raider89

OK, dumb question for all. I recently purchased spare set of wheels and intend to mount new tires for track use only. I am trying to determine if I must have TPMs on the wheels during mounting versus just valve stems.


If this requires computer reprogramming from dealership, then will be pain in butt to move tires back and forth. What is the deal? Also, any recommendations for TPM sources and how long should they operate satisfactorily?
2008 911 Turbo
Thanks,

mhm993

They're track tires and wheels? You don't install tpm's. You get an idiot light when you mount the wheels, and who cares since its the track and you bring a tire gauge. When you go back to your street wheels, you push reset. That's what we always did when we put track wheels on our 08 cayman.

lmnsblu355

I respectfully disagree with this. Tire pressures in the paddock are one thing but the dynamic monitoring with

TPMS is priceless. Real world: I was at Limerock, just going through west bend before the downhill when my TPMS gave me an alert - low pressure left front. Lifted on the downhill and pulled off line without any drama, pitted. By the time I was in the paddock, left front was completely flat. 1/4 inch hole from fresh puncture.

If not for the TPMS, I would have been on throttle down the hill setting up for the right hand into the main straight. Not where I want a left front tire with 10 psi!!!

TPMS is great tech and the system is already there. Just get aftermarket sensors and have them installed in your track wheels. As long as you get the correct sensors, you can easiiy reset via the onboard computer when you swap wheel sets.

Raider89

Do you have recommended source or manufacturer of reliable aftermarket sensors?

lmnsblu355

Got these in 2014 from OE wheels. Mounted on my track wheels. So far, so good.

http://www.oewheelsllc.com/TPMS-Sens...-Sensors-SET_3

Raider89

I just bought same ones, but for 2008. Will spray paint them gunmetal color first prior to mounting to match the new wheels.

BigChallah

I have a dumber question - how do I determine if I have a TPMS? (997 c2s)

lmnsblu355

Just let the air out of one of your tires and if you have TPMS, it will alert you.


Nah....don't do that. Just play with the computer stalk on the left side of the steering column to run through the onboard diagnostics (like checking the oil level, time/temp, etc..) TPMS shows as a stick figure car with 4 wheels and numbers on the lower part of the tach. (Image not my car but same as my GT3)

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brad@tirerack.com

If you have TPMS, you will have a metal valve stem on a 997. If rubber, there is usually no sensor.

promocop

So, here is my tale of wow. My TPMS (on a 2010 GT3) indicates a low tire pressure. It is not. Shows the correct TP on the 'tree' and I have checked it with a mechanical gauge. All good. I have reset it several times but the dash shows the "!" sign and 'Low tire pressure' warning. I have reset both for winter and summer tires. Same result. Clearly the sending unit is good as it resisters the correct tire pressure. Wont reset the warnings. Any ideas?

lmnsblu355

Have you tried disconnecting the battery for 10 minutes and the reconnecting? If that doesnt work, try someone with a duramtric or porsche dealer.