BAD2BNE

What gives you the best performance in comromise with the best tread life??

I just had a set of GY Eagle F1s (non-ruflat version of the EMTs) put on today and they came out of the shop with 35 psi in all 4 corners...I set them all at 32 psi and was wanting your opinions based on what you are getting the best all around of both from??
As always, TIA :cheers:

AP

I think that the best is around 30psi cold ..

Mad_Dog

BAD2BNE

Thanks guys for the responses.. :cheers:
I'll set them down to 30psi on all 4 corners and see how she handles..
Not too much sidewall roll at that pressure in high speed corners, right???
thanks again :D

gmblack3

30 psi is the GM recommended for the Z06.

BAD2BNE

:cool: Thanks, they'll be at 30 psi all around when she slides out of the garage next!! :cheers: :seeya :flag

Len16

The tire pressure will increase about 2 psi after the car is driven.

I run 29 psi (cold) on the original tires.

jetskifast

32 PSI all the way around :cheers:

davidmax

32 on all 4 corners.Dave

Tom/99

I have been running 30 psi all around in the tires on my 99 Coupe.

carhopper

I have brand new non run flats that I just put 2,500 miles on last month at 29psi. There is a noticable ridge across the center of all 4 tires that indicates the pressure is too low. I just changed them to 33psi to try and even out the wear pattern. I also get a little roar so maybe this will help that too.

Silverbullet00

Nitto 555R currently on my car. Chase the TP depending on outside temp will drive you crazy. I try to run near 30 at all corners every season of the year.

bobby777

Cold for best all around is 31.543 on the left front and 30.765 on the right front-rear on both sides is 32.0002--hope this helps

Bill Dearborn

It doesn't depend on the type of tire. The manufacturer sets the recommended cold pressure based on the weight and performance characteristics of the vehicle. Go with the factory recommendation. In the old days the factories recommended softer pressures to make the cars ride easier but that went out many years ago when gas mileage became a paramount concern.

Bill

Bob Chapman

bobby777 is exactly right except he leaves out one vital piece of data - the definition of "cold". Cold is defined as 53.79 degrees Fahrenheit at an altitude of 2356 ft.

Yello95

30 cold is just a generic reading on the door sticker...30 hot has worked for me for years. I have to adjust seasonally to get 30 hot reading/checking ambient temperature frequently.
I know i'm not a racecar driver but isn't that the way racecar drivers adjust their air pressure?

Bill Dearborn

30 cold on the door isn't a generic setting. It is the pressure you should set the tires so they reach the proper warm temperature. Notice I said warm not hot. Street tires don't see hot temps any where near what a race tire sees. Typical street tire tread temps are in the 130 range while hot race tire tread temps are in the 190 to 220 range. Tire pressure and temperature are linked. The lower the initial cold pressure, the hotter the tire runs which makes the pressure higher. Both temperature and pressure affect tire spring rate which affects handling. They also affect tire grip which also affects handling. The 30 psi setting on the door is for all makes of tires that fit on the Vette.

Bill

old stingray

30 p.s.i. Cold

Yello95

I did notice you said "warm" and that confuses most of us...so now we should go by 30 "warm" not "hot"? or 30 cold? maybe 30 medium rare?...lol...So you are in disagreement with ET? He says 30 hot (not 30 warm)and since I have been using this formula, I have seen no rear tire wear problem like I use to see...go figure???

lionelhutz

Use whatever pressure gives even tire wear. Even if the sticker on the door says 30psi, when the tires are wearing the centers or edges then it's the wrong pressure.

Trying to keep the "correct" pressure in the tires at all times is impossible. The pressure will vary from a morning drive to one after the car has sat in the sun for a bit. So, do take the ambient temps and tire pressure swings into consideration when setting the pressure.

I'm running wider than stock rubber. In my rears, I run around 28 "cold" in the typical ambient temperature for the season so the pressure typically rises to around 30-31psi when driving. I put ~40k miles on the PS2's I just took off and the wear was very even across the tire surface so it seems to work. It's just an average. The pressure can still vary 3-4 psi day to day but it's not worth chasing day to day.

The previous owner followed the door sticker and wore the centers bald while there was still a fair bit of tread left on each side.