New Z Owners - Check your tire pressure

semtex · 03-11-2009, 10:30 AM

Quote:

Originally Posted by molamann

Hmm, what is considered "super overinflated?" I'm guessing somewhere near 50+psi?

Exceeding the max pressure printed on the sidewall.

epod86 · 03-11-2009, 07:31 PM

Quote:

Originally Posted by semtex

Exceeding the max pressure printed on the sidewall.

I'm reminded of a time when some guys were fixing bikes in my Uni dorm. One guy kept blowing inner-tubes. After the second one I heard (from my room no less) I confronted him and asked what he pressurizing them to. He said he was following the 'normal' marking on the bike pump. I looked at it and 'normal' was between 60-100 psi according to the numbers underneath the writing. I told him he was crazy for going to 60psi for a bike, but he insisted that was 'normal' like the pump said. I then looked at the side of the pump and it had RACING in big letters. Apparently Wal-Mart mountain bike/run arounds are considered racing bike now

He stopped pumping tires and went to fixing inner tubes.

LenZToy · 03-14-2009, 08:28 AM

My tires were all over 41 and the alarm was on.

kantonm · 03-14-2009, 03:09 PM

I had a toyota MR2 and the prevoius owner had the tires at 45psi...when i lowered the pressure I noticed that the tires seemed a little quieter, just a thought.
Also the advantages of Nitrogen for regular street drivers is that your pressure lights won't go off every time it gets a little colder outside...really annoying..
My father raced porsches for years and they all overinflated the tires on track and slalom days to increase the grip and response, maybe nissan is doing this to increase the handling for test drives... they ran as high as 50psi without tire damage, however the tires were deflated to normal for street or storage..

LenZToy · 03-14-2009, 05:15 PM

I lowered the tire pressure to 35 on all tires, went for a drive to reset the warning light, but it's still on. I drove about 5 miles, stopped and cut off the engine. When I started up the car, the warning light blinks for about a minute then stays on...just what the manual says if there is a problem with the system or sensor. Guess it'll be a trip to the dealership.

Anyone else having a problem with the warning light staying on?

cotizi · 03-29-2009, 10:46 PM

checked mine tonight and all were at 45 psi.

tvfreakazoid · 03-30-2009, 05:50 PM

Doesn't the nitro air will last a lot longer as well? But it's really expensive isn't it?

Quote:

Originally Posted by kantonm

I had a toyota MR2 and the prevoius owner had the tires at 45psi...when i lowered the pressure I noticed that the tires seemed a little quieter, just a thought.
Also the advantages of Nitrogen for regular street drivers is that your pressure lights won't go off every time it gets a little colder outside...really annoying..
My father raced porsches for years and they all overinflated the tires on track and slalom days to increase the grip and response, maybe nissan is doing this to increase the handling for test drives... they ran as high as 50psi without tire damage, however the tires were deflated to normal for street or storage..

ChrisSlicks · 03-30-2009, 06:18 PM

They pick 35 because that is the compromise number. The same tire on an Infiniti they would probably pick 33 to make it a little softer. On my Infiniti I would often go to 45 psi up front during auto-x to optimize grip with all the body roll. On the street I'm usually right around 36. If it's a wet auto-x you can deflate them some for a little more predictability.

Your tire isn't going to blow out at 45, but you would be more likely to break a belt if you hit a sharp object or a large pothole. It takes about 140 psi to make a tire explode.

MightyBobo · 03-30-2009, 07:56 PM

Just checked - 36-37 all around on mine.

chibbell · 04-07-2009, 06:56 PM

Quote:

Originally Posted by LenZToy

I lowered the tire pressure to 35 on all tires, went for a drive to reset the warning light, but it's still on. I drove about 5 miles, stopped and cut off the engine. When I started up the car, the warning light blinks for about a minute then stays on...just what the manual says if there is a problem with the system or sensor. Guess it'll be a trip to the dealership.

Anyone else having a problem with the warning light staying on?

The light came on for me on the way to work yesterday. Stopped and checked pressure on warmed up tires. All at 42. When I left work the light was off. Got back in later and it came off again.

Going to check pressure when cold and set to 35. If the light stays on I guess its to the dealer for me too.

LenZ - did you have to go into the dealer? Any word on what was up?

ChrisSlicks · 04-08-2009, 11:12 AM

Quote:

Originally Posted by chibbell

The light came on for me on the way to work yesterday. Stopped and checked pressure on warmed up tires. All at 42. When I left work the light was off. Got back in later and it came off again.

Going to check pressure when cold and set to 35. If the light stays on I guess its to the dealer for me too.

LenZ - did you have to go into the dealer? Any word on what was up?

Your cold pressures were probably at around 39/40 which isn't enough to throw the alarm, as you drove and warmed up the tires the pressure climbed to 42 which set off the alarm. Sitting parked they cooled back down again and the pressure dropped below the threshold again. Just drop the cold pressure to 35 and you should be fine.

chibbell · 04-08-2009, 02:35 PM

Quote:

Originally Posted by ChrisSlicks

Your cold pressures were probably at around 39/40 which isn't enough to throw the alarm, as you drove and warmed up the tires the pressure climbed to 42 which set off the alarm. Sitting parked they cooled back down again and the pressure dropped below the threshold again. Just drop the cold pressure to 35 and you should be fine.

That's what I'm hoping for. I meant to bleed off the extra pounds last night but forgot. I did start her up this morning. Alas, completely cold, the light was flashing. It could be just because it hasn't reset yet.

I'll definitely drop the pressure when I get home from work and take it from there. Hopefully a few miles of driving will reset it.

Does anyone know if the TPMS monitors the spare?

SoCal 370Z · 04-08-2009, 02:40 PM

Quote:

Originally Posted by chibbell

Does anyone know if the TPMS monitors the spare?

No. There is no TPMS sensor in the spare.

chibbell · 04-08-2009, 04:05 PM

Quote:

Originally Posted by SoCal 370Z

No. There is no TPMS sensor in the spare.

Thanks again for the info. I assumed not, but it was worth checking.

LenZToy · 04-08-2009, 09:50 PM

Quote:

Originally Posted by chibbell

The light came on for me on the way to work yesterday. Stopped and checked pressure on warmed up tires. All at 42. When I left work the light was off. Got back in later and it came off again.

Going to check pressure when cold and set to 35. If the light stays on I guess its to the dealer for me too.

LenZ - did you have to go into the dealer? Any word on what was up?

I haven't been to the dealer yet. Waiting for the first oil change. I know what the tire pressures are so I'm guessing the TPMS malfuntion is somehow related to when the wheels were moutned or something. Biggest concern is when the service department removes the wheels to check the system and some young kid scratches it either taking the lugs off or putting them on!

03-14-2009, 03:09 PM	#34 (permalink)
kantonm Base Member Join Date: Feb 2009 Location: california Posts: 29 Drives: 06 Acura TL Rep Power: 16	tire noise? I had a toyota MR2 and the prevoius owner had the tires at 45psi...when i lowered the pressure I noticed that the tires seemed a little quieter, just a thought. Also the advantages of Nitrogen for regular street drivers is that your pressure lights won't go off every time it gets a little colder outside...really annoying.. My father raced porsches for years and they all overinflated the tires on track and slalom days to increase the grip and response, maybe nissan is doing this to increase the handling for test drives... they ran as high as 50psi without tire damage, however the tires were deflated to normal for street or storage..

03-30-2009, 07:56 PM	#39 (permalink)
MightyBobo A True Z Fanatic Join Date: Feb 2009 Location: Las Vegas, NV Posts: 8,465 Drives: No cars; only bikes Rep Power: 52	Just checked - 36-37 all around on mine. __________________ I don't own a car anymore.

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03-14-2009, 08:28 AM	#33 (permalink)
LenZToy Base Member Join Date: Jan 2009 Location: Mechanicsville, Va. Posts: 143 Drives: 2013 370Z Black 6SP Rep Power: 268	My tires were all over 41 and the alarm was on.

03-14-2009, 05:15 PM	#35 (permalink)
LenZToy Base Member Join Date: Jan 2009 Location: Mechanicsville, Va. Posts: 143 Drives: 2013 370Z Black 6SP Rep Power: 268	I lowered the tire pressure to 35 on all tires, went for a drive to reset the warning light, but it's still on. I drove about 5 miles, stopped and cut off the engine. When I started up the car, the warning light blinks for about a minute then stays on...just what the manual says if there is a problem with the system or sensor. Guess it'll be a trip to the dealership. Anyone else having a problem with the warning light staying on?

03-29-2009, 10:46 PM	#36 (permalink)
cotizi Enthusiast Member Join Date: Mar 2009 Location: Austin, Tx Posts: 391 Drives: 2012 VW GTI 6MT Rep Power: 217	checked mine tonight and all were at 45 psi.

03-30-2009, 06:18 PM	#38 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	They pick 35 because that is the compromise number. The same tire on an Infiniti they would probably pick 33 to make it a little softer. On my Infiniti I would often go to 45 psi up front during auto-x to optimize grip with all the body roll. On the street I'm usually right around 36. If it's a wet auto-x you can deflate them some for a little more predictability. Your tire isn't going to blow out at 45, but you would be more likely to break a belt if you hit a sharp object or a large pothole. It takes about 140 psi to make a tire explode.