andreakobe44

My Z tires are at 32 psi and I saw on the inside by the door that it says 35 psi. Do I need to put more air in them or should it be fine?

SunsetSunrise

iTrader: (16)

35 - 32 = 3

HighwaySpeed

Common sense.

trains1937

Put more air in them. Do what the man says.

fr0ng

my 03 track tires are around 40-41psi

terrasmak

iTrader: (8)

not really , depends on driving , preference etc et . Then you have the sheep that just do what the book says .

davidv

iTrader: (2)

I prefer 35 PSI yes. On a long trip at 60 MPH plus, I might pick up the pressure to 37 PSI. But never less than 35.

The Brickyard Rat

iTrader: (1)

Yes on 35. Never hurts to follow recommendations of guys who built the car.

If that makes me a sheep, my only comment is "Baaaaaaaaaa".

gabez33

iTrader: (7)

the PSI is recommended for the tires that come stock with the Z, if you switch tires...then its different, a friend of mine says a good rule is to stay 10PSI under the max...dont assume all tires that you put on the Z need to be at 35.

terrasmak

iTrader: (8)

The car is set up , tuned etc etc for the common idiot AKA "sheep" it is a general setup that will work average in most conditions.There is nothing wrong with changing things up to better suit your own driving. Oh ya , the tire part above , very good point. Personally i run 32 rear 34 front , and bump to 36 all for long trips .

gotbooost

iTrader: (2)

Also check with diff tire pressure gauges if you really wanna get ****. i tried with 3 diff tire pressure gauges and it ends up that my TPS is off by about 4 psi (it constantly reads about 4 psi under the other gauges i've tried)

not sure if this is due to my car being an 03 or what.. just something i've noticed since i drop tire pressure @ the track

BRONZEE

Hmm, or come off the bead. I've seen someone do this in the last couple of weeks, result isn't very good.

Anyway, op, depends on what tyres. But yes 35psi is the recommended pressure for the stock tyres.

JAB_06-350Z

Barzten1

iTrader: (18)

I think its a good question. I have 35 series tires. Im running 45psi up front and 42 in the rears.

Z04

iTrader: (15)

no matter what tire size is, you should never go over the amount of tire pressure listed for the car unless you are doing a auto-x event. otherwise you will have horrible gas mileage and maybe premature tire failure.

http://www.tiresafety.com/maintenance.asp

Inflation Pressure
Proper inflation pressure is essential for achieving maximum performance and mileage. Improper tire inflation pressure can cause severe internal tire damage, which can lead to sudden tire failure and resulting in serious personal injury or death.Improper inflation pressure may result in rapid or irregular wear. Pressures should always be checked when the tires are cold and at least monthly. Under normal tire operation, approximately 1psi of tire pressure will escape every month. Also, for every 10 degrees F change in ambient temperature, tire pressure will change by approximately 1psi.

Vehicle manufacturers list recommended tire pressures for original vehicle tires in the owner's manual or on a placard on the end of the driver's side door or in the glove box.

For continuous high speed driving, tire pressures should be increased by 3 to 5psi above the normal cold inflation recommended.

However, for passenger tires, never exceed the maximum inflation pressure molded on the sidewall. The inflation pressure for light truck tires may exceed that molded on the tire by 10psi. Any recommended front to rear pressure differential should be maintained.

bailey bill

Well, lets see....

Here I have this manual written by teh engineers that designed the car. Should I follow their instructins, or should I ask a bunch of guys on a message board?

I really wonder what i should do.

bill

Viffer35Z

Wow, that sounds bumpy.

terrasmak

iTrader: (8)

The also recomend taking your car to the dealership for any light bulb change , are you going to do that. Its written in the manuel by the engineers for the sheep to follow!!!!!

The Brickyard Rat

iTrader: (1)

So, terrasmak, when did you develope this obsession with sheep?

roast

iTrader: (2)

Clarification. Under-inflated tires are what cause a drop in MPG. Increasing tire pressure reduces rolling resistance and thus increases MPG. That's why most hybrid vehicles have very high pressures in their tires. That's also why most of us who have a clue, will put a few extra PSI in if going on a long trip to improve MPG. The only premature wear you'll get is if you increase the pressure way too much (and keep it that way) and cause the middle of the tire to wear faster than the outside edges. As far as failure - listed on the tires themselves is the max psi rating.