Nissan 370Z Forum  

Why is our tire pressure so high?

I was just wondering why the tire pressure that nissan recommends for the 370 is so high? I had a C5 Vett, and have looked at the C6 as well,

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Wheels & Tires


Reply
 
LinkBack Thread Tools Display Modes
Old 05-18-2012, 10:57 PM   #1 (permalink)
Base Member
 
bigrob126's Avatar
 
Join Date: Jan 2011
Location: Las Vegas NV
Posts: 134
Drives: 2009 370Z Sport Auto
Rep Power: 13
bigrob126 is on a distinguished road
Default Why is our tire pressure so high?

I was just wondering why the tire pressure that nissan recommends for the 370 is so high? I had a C5 Vett, and have looked at the C6 as well, and the tires were....are of about the same size and profile, and the car weighs about the same as well, and the recommended pressure is 30 all around......although Vetts come with runflats, but I changed mine to non runflats and the 30lbs felt fine! I mean, the pressure should be decided by the size tire and wheel, and the weight of the vehicle, front and rear. If vehicles are basically the same weight and have the same size tires and wheels, the pressure should be about the same or very close, no?
I put 35 in my new tires and it feels way to much pressure for me. Was using 34 in the OEM's. Going down to 33 to check it out.
__________________
Rob

Last edited by bigrob126; 05-18-2012 at 11:56 PM.
bigrob126 is offline   Reply With Quote
Old 05-18-2012, 11:21 PM   #2 (permalink)
Base Member
 
Join Date: Nov 2011
Location: Oklahoma
Posts: 174
Drives: 2011 Tour/Spt 7AT
Rep Power: 12
CSA0890 is on a distinguished road
Default

What does Nissan recommend?
CSA0890 is offline   Reply With Quote
Old 05-18-2012, 11:56 PM   #3 (permalink)
Base Member
 
bigrob126's Avatar
 
Join Date: Jan 2011
Location: Las Vegas NV
Posts: 134
Drives: 2009 370Z Sport Auto
Rep Power: 13
bigrob126 is on a distinguished road
Default

Quote:
Originally Posted by CSA0890 View Post
What does Nissan recommend?
35 at all 4 corners.
__________________
Rob
bigrob126 is offline   Reply With Quote
Old 05-19-2012, 01:33 AM   #4 (permalink)
A True Z Fanatic
 
Waiz's Avatar
 
Join Date: Apr 2010
Location: SoCal
Posts: 9,257
Drives: Z33 & GE8
Rep Power: 458
Waiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond reputeWaiz has a reputation beyond repute
Default

35 (cold) is completely normal
Waiz is offline   Reply With Quote
Old 05-19-2012, 07:29 AM   #5 (permalink)
Premium Member
 
TreeSemdyZee's Avatar
 
Join Date: Dec 2009
Location: Kentuck-IANA
Age: 59
Posts: 4,860
Drives: '09 370 & 14 Juke
Rep Power: 24051
TreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond reputeTreeSemdyZee has a reputation beyond repute
Default

30 sounds pretty soft for a low-profile tire. That's closer to squishy passenger tire pressure.
TreeSemdyZee is offline   Reply With Quote
Old 05-19-2012, 08:00 AM   #6 (permalink)
A True Z Fanatic
 
Baer383's Avatar
 
Join Date: Aug 2010
Location: Lawrenceville,Ga
Posts: 4,293
Drives: My foot up your azz
Rep Power: 29
Baer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond reputeBaer383 has a reputation beyond repute
Default

Quote:
Originally Posted by TreeSemdyZee View Post
30 sounds pretty soft for a low-profile tire. That's closer to squishy passenger tire pressure.


34-35 psi cold is right you should try this on 20's
__________________
2013 ZL1

754 rwhp 747 rwtq
Baer383 is offline   Reply With Quote
Old 05-19-2012, 09:51 AM   #7 (permalink)
A True Z Fanatic
 
2011 Nismo#91's Avatar
 
Join Date: Mar 2011
Location: NJ
Posts: 2,365
Drives: slowly
Rep Power: 30501
2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute2011 Nismo#91 has a reputation beyond repute
Default

30-35 is the typical range I have seen on all cars. A little higher PSI tends to give you a little better MPG then lower.

Think of it like this higher psi less of the tire needs to contact the road so less friction less lost energy. Lower psi more tire contacts the road more friction. But remember never take your PSI too high or too low it has side effects.
2011 Nismo#91 is offline   Reply With Quote
Old 05-19-2012, 09:58 AM   #8 (permalink)
Base Member
 
bigrob126's Avatar
 
Join Date: Jan 2011
Location: Las Vegas NV
Posts: 134
Drives: 2009 370Z Sport Auto
Rep Power: 13
bigrob126 is on a distinguished road
Default

I realize 35 sounds about right, probably because that is what nissan says it should be, I was just wondering if anyone knew why or how nissan chose this number, when most other high performance cars with similiar size tires have mush lower recommended pressures. The Dodge Viper's is another, with pressure at 29! I have owned much higher performance cars that this Z and the pressures have never been this high. Besides the fact that I think my car feels like sh-t with this much pressure, and thats why I am going to experiment!
__________________
Rob
bigrob126 is offline   Reply With Quote
Old 05-19-2012, 09:59 AM   #9 (permalink)
A True Z Fanatic
 
Cmike2780's Avatar
 
Join Date: Jun 2010
Location: Long Island
Posts: 5,059
Drives: slowwww
Rep Power: 28
Cmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond reputeCmike2780 has a reputation beyond repute
Default

It's all in your head
__________________
[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]

Cmike2780 is offline   Reply With Quote
Old 05-19-2012, 09:59 AM   #10 (permalink)
A True Z Fanatic
 
cossie1600's Avatar
 
Join Date: Jun 2009
Location: californee way
Posts: 5,380
Drives: 370, Leaf
Rep Power: 29
cossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond repute
Default

Different tires
cossie1600 is offline   Reply With Quote
Old 05-19-2012, 12:39 PM   #11 (permalink)
A True Z Fanatic
 
CBRich's Avatar
 
Join Date: Apr 2009
Location: SC
Posts: 2,464
Drives: 370Z
Rep Power: 543
CBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond reputeCBRich has a reputation beyond repute
Default

A lower tire pressure gives a more comfortable, softer ride. The sort of thing you would expect in a car with an average buyers age of around 55.
CBRich is offline   Reply With Quote
Old 05-21-2012, 12:25 AM   #12 (permalink)
A True Z Fanatic
 
Join Date: Jul 2010
Location: Virginia
Posts: 1,134
Drives: 2009 Touring Sp Nav
Rep Power: 16
wilsonp will become famous soon enough
Default

The NSX recommendation was 33F / 40R, so the 370Z isn't really high. I notice a softness in handling when my tire pressures drop to around 32.
__________________
2014 Cayman S PDK Sport Chrono White/Black
Was 2009 370Z Touring Sport+Nav 7AT Metallic Black/Persimmon
Was 1991 NSX Auto Black/Black
wilsonp is offline   Reply With Quote
Old 05-21-2012, 03:42 AM   #13 (permalink)
The370Z.com Sponsor
 
Mike's Avatar
 
Join Date: Jun 2009
Location: Loganville, GA
Posts: 5,944
Drives: 370z
Rep Power: 2185
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

my wife's Z4 is 36/42. It also depends on the suspension and probably a lot of other factors too.
__________________
NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968
Mike is offline   Reply With Quote
Old 05-21-2012, 04:04 PM   #14 (permalink)
Base Member
 
axeman71's Avatar
 
Join Date: May 2010
Location: Augusta, GA
Posts: 129
Drives: '10 Conv A7 Blk Chry
Rep Power: 14
axeman71 will become famous soon enoughaxeman71 will become famous soon enough
Default

The non-sport 18" have an even higher recommendation of 38psi.
__________________
2010 Roadster, 7AT, Black Cherry, Touring, Navigation, Lighted Kick Plates, Floor and Trunk Mats.
axeman71 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tire pressure question-too high psi? cjeezy Wheels & Tires 3 04-28-2012 08:39 AM
Tire pressure bigrob126 Wheels & Tires 4 02-10-2011 09:44 PM
Tire Pressure RedNismo Nismo 370Z 6 06-25-2010 11:54 AM
Tire Pressure Monitoring System; Do you get details on each tire? raps101 Wheels & Tires 20 06-29-2009 09:17 AM


All times are GMT -5. The time now is 04:19 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2