Effects of running tires 5 pounds higher
#1
Effects of running tires 5 pounds higher
You may have seen my post regarding my new tpms sensors that measure 5 pounds low. This forces me to run my tires(Michelin PSS) 5 pounds higher so the alarm doesn't go off.I really don't like having to do this. This means once my tires warm up i'm nearly 40(from gauge reading) pounds in the fronts and pusing 50 in the back. This can't be good can it?
#2
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#4
For me with MPSS 33/37 seems to be a good balance for the car. I can feel a slight hint of sluggishness compared to dealer settings, but the overall handling and feel of the car is significantly improved. There is also a noticeable difference in MPG as opposed to running dealer settings, I didn't bother to test numbers but it appears to be up to 20% loss in MPG running these lower pressures. MPSS has a tendency to get really greasy when you start pushing over 40 psi hot.
Anyways, you have a nice car and nice tires; set them at the pressures where you can really take advantage of them. No point in forking out $1500 for tires that you're never going to take advantage of!
As far as getting the TPMS fixed, try setting it to Partial Load in the TPMS settings. Worked for me when I was testing the fronts at 28 cold and it kept warning me to add air.
You can also consider getting your tires filled with nitrogen so that the PSI doesn't fluctuate as much.
Anyways, you have a nice car and nice tires; set them at the pressures where you can really take advantage of them. No point in forking out $1500 for tires that you're never going to take advantage of!
As far as getting the TPMS fixed, try setting it to Partial Load in the TPMS settings. Worked for me when I was testing the fronts at 28 cold and it kept warning me to add air.
You can also consider getting your tires filled with nitrogen so that the PSI doesn't fluctuate as much.
#5
I have it set to partial load and if it drops below 30 pounds I get the warning. I purchased my replacement TPMS through my tire dealer, however the stock sensors were off by 3 pounds. I know the place that installed them said they had to program them, can they program at what deficit the alarm goes off at or that something that Porsche has it set at? The nitrogen idea not be a bad idea.
#6
Rennlist Member
TMPS is usually 2-3 PSI off, but never that much off. Are you sure your other tire gauge is accurate?
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#8
Rennlist Member
The dealer or tire shops never seem to inflate to correct tire pressure - ever. First thing I do is check the torque on the lug nuts and inflate to the proper pressure upon arriving home.
#10
I suspect the car will be bouncier, have less grip, and tires will wear in the center. Other than that not much else except a little better gas mileage. I would fix the tpms. Good luck.
#11
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I'm usually setting them 7% below full spec, and set for partial load. I use the race gauge we got on the group buy some time ago for accuracy, and ADias' pressure chart to compensate for ambient temps.
You should either have it fixed, or wouldn't the 'reset to current pressures' resolve this?
If they continue to read incorrectly, replace them, they are not that costly and tires are your primary life saver. And make sure you have a high quality gauge, do not go by the readout on the car.
You should either have it fixed, or wouldn't the 'reset to current pressures' resolve this?
If they continue to read incorrectly, replace them, they are not that costly and tires are your primary life saver. And make sure you have a high quality gauge, do not go by the readout on the car.
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#12
Drifting
You may have seen my post regarding my new tpms sensors that measure 5 pounds low. This forces me to run my tires(Michelin PSS) 5 pounds higher so the alarm doesn't go off.I really don't like having to do this. This means once my tires warm up i'm nearly 40(from gauge reading) pounds in the fronts and pusing 50 in the back. This can't be good can it?
#13
Race Director
You may have seen my post regarding my new tpms sensors that measure 5 pounds low. This forces me to run my tires(Michelin PSS) 5 pounds higher so the alarm doesn't go off.I really don't like having to do this. This means once my tires warm up i'm nearly 40(from gauge reading) pounds in the fronts and pusing 50 in the back. This can't be good can it?
My experience with my Boxster running the front tires overinflated was the car would exhibit a vibration like tire imbalance. Lowering the pressure back to the recommended pressure cured the vibration. I have bothered to run my Turbo tires overinflated to see what happens.
Even if there is no vibration the tires will wear in center. Grip will be compromised. The ride will be harsher and likely noisier too.
I am with the others. Get the TMPS fixed or re-calibrated or reset or whatever it is called and then run the tires inflated to the appropriate pressure based on the vehicle's load.
#15
Drifting
Having a bunch of gauges that all read the same doesn't mean any of them are reading correct. You need to compare their reading to a known, valid comparison source. Some physical phenomenon like pressure producing source that is know, by volume and density of its components, to produce a certain air pressure, or compare it to a known calibrated master gauge.