savyboy

My TPMS works fine on track (and certainly on street), I have learned to trust it and depend on it. It is 2010 RS so a Gen II system as MJones noted above. Seems to update every couple of seconds. No problems so far (knock on wood)

Sorry to hear yours is acting up, in your shoes I would be very frustrated too.

OldGuy

I have a 09 PDK and its trouble some. I dont know what I have Ver I or VerII.
I know the one in my 997 GT3 wasnt very good.

Asquared

A couple of observations.

1) The tire pressure "Proper Inflation" metric (ie, the one that one can only use while stationary and gives you a reading in +/- PSI) adjusts for the air temperature. So, if you start out with cold tire pressure set at the recommended tire pressure and them heat up the tires, this will still read that the tires are properly inflated. This is very useful for the street when you want to add air to hot tires. But, on the track, when you bleed off air because you want target a hot temperature, this metric will think your tires are underinflated. Therefore, your - 7-8 PSI on this screen means you probably bleed off 7-8 PSI (ie, the TPMS is actually working perfectly)

2) I've also found that that any sudden decrease in tire pressure (read bleeding) will trigger the flat tire warning. That is what the system is designed to warn you off, and sudden decrease in tire pressure.

3) When I'm on the track, I leave the pressure indicator on (the one that gives you actual readings at all four wheels). Mine is off by a fixed number of PSI, but it is consistently off by the same pressure (2 PSI low) cold or hot. I can tell when the tire pressure is getting up to operating range, and also when it is at risk of getting too high.

4) Last time at the track, I did find that when it got hot, the Proper inflation was stuck at -7 on the right rear wheel after I added air at the end of the day. In other words, even though the pressure indicator showed the same pressure for both rear tires, proper inflation indicator showed one was properly inflated and the other was 7 psi under. By morning, it was usually fine.

MJones

Gen 2;

The new 911 GT3 is provided worldwide as standard with enhanced Tire Pressure Monitoring System (TPMS) and permanent monitoring of the air pressure on all four wheels. Compared to the previous model, this new system adopted from the current 911 Carrera models allows faster pressure display after the ignition is switched on, faster and continuous pressure update during the filling process and a faster teaching process for the new set of tires following a wheel change. The new system no longer has individual antennas in the wheel housings, but has trigger transmitters, a central antenna under the floor of the vehicle and enhanced wheel electronics.

deputydog95

Seems like there are a lot of mixed reviews on this system

amaist

Does the system (gen 2) require to have sensors in the wheels?

If yes then it's a PITA for guys that swap wheels at the track.

Can the gen 2 TPMS be shut off? I know gen 1 worked best when it was disabled through the dealer computer.

rmag

Here's my track tire pressure monitoring system

mooty

i tried hard to keep quiet.

LOL, you too?
my is a magnum gauge, near sighted you know. well, blind almost

i really dont like TPMS. so much so, i killed off my completely.

TRAKCAR

Same here. I still liked having it, even if it works only half the time. The system turned on TC and SC twice, but in both cases I had an actual flat.

wilfred

Somewhat related topic but I found below article interesting. I guess some will love what's coming and some will hate it more

http://www.caranddriver.com/features...nsor-tech_dept

Hope it's not a repost!

KBS911

Yep, me too. I find that when I drop the pressure much below the recommended values the idiot light comes on and tells me I have a flat tire, but my trusty analog gauge tells me I'm just fine. I have to overfill the tire, drive for a bit till the light goes off, then drop it back to nominal and all is well.

deputydog95

That looks interesting!

stujelly

The TPMS in my opinion does what it is supposed to. My first experience with it was at the Porsche School in Birmingham before we got our GT2. Just before the start finish line I got a rear flat tire warning. Since I did not want to buy a car that day I slowed down considerable before turn 1. Luckily I did because as I made the turn I could feel the car become what I thought was extremely loose. Long story made short, I probably would have spun the car out had I not paid attention to that warning.

I agree, I run tire pressures from a high end gauge, and pay no attention to the number on the dash, but if I get an error message, I stop to check it out. What do you have to loose. A lap?? Better than your car.

Just my 2 cents.

deputydog95

I'm going follow suit behind Mooty and have the dealer turn it off. It's just too annoying.

I was at Sebring yesterday and I had that stupid flat tire warning all day. It's just not worth leaving it on. Not to mention it is not even close to accurate on the track.

Too add to all this I had a major malfunction which threw up another error. I found it somewhat distracting having that and the tire warning going at the same time. Since the TPMS is constantly crying wolf, might as well kill it so I can pay attention to other potential real dash warnings that come up.

Izzone

Mine is stuck on right now....Longacre gauge works just fine

Having it turned off