When I 1st start the car and get her up to 15 mph the tire pressure sensors i check what should the psi on them be at? I have Nitto 555 on stock c5 sized chrome z06 replicas from Corvette of Houston. What should all 4 of my tire psi be? Im assumming you check the correct psi whent he car is cold.. and you 1st get her to 15 mph correct?

 

30psi cold

 

ouch last nite after driving for a while they were at 38 I think they are 32 cold.. ill lower them

 

Pfft i drive 17psi rear 30psi front though 32 would be better for the front.

 

quick AND EASY.. tires never wear while they are cold.. they do not perform at all when they are cold.. the idea is to have them at the proper temperature hot yes hot.,..now doesn't that make more sense?
Every performance group: Winston cup, formula 1 , NHRA, Sema, IHRA, etc measures the track temperature many time over the course of the day, and adjust tire pressure according to the cars set up... they test tire pressure "Hot" because the car will see Hot tire pressure while performing. You Can not tell me a Guy in Bismarck North Dakota should set his cold tire pressure to what it says on the door specially when its -27F, and the same door sticker is in the C5 that is in Arizona on a 110 F day.. Yeah I know its a dry heat, but if both guys put 30 psi in their car... one will be 25 psi soon as he is out on the road, and the other guy will see 35 when he is put on the road..
road temperatures on a 95+ day on a black top road in Georgia can reach 160 F.
OK you want the number..????
I don't let my tires get over 30psi or under 28psi and that's while they are at operating temp..
Using this method I can consistently get 43/45000 miles out of a set a tires.. and this is some aggressive driving..
the problem with cold temps specially in the summer is the heat up quickly to 35/36 psi.. and become center high the foot print diminishes you get less traction by taking an inch out of the footprint, you loose traction and the tires lose grip and you wind up erasing 30% of the tire because you don't have a even down force and your 10 in rear wheels are now 8 inches...
WOW, that wasn't quick and easy..
remember all performance crew monitor track temperature and adjust the car accordingly so Hot tire pressure is important to them .. they can get a extra few laps from tires that are set by the road temp... and also better gas mileage.. most people here that push their car see center tire wear this is because they have too much tire pressure in their car when they are hot..

 

For '99 - Volume 1-3 - section 3, page 104 -

"The Tire Placard (information label) is permanently located on the rear of the driver's door edge. The following information may be found on the Tire Placard (information label):

* The maximum vehicle load.
* The tire size.
*The COLD inflation pressure for the tire."


From GM's lips -


PS - Cold is defined as local ambient air temp.

 

You're in trouble now. When ET sees that he'll be coming across that Red river. Have your guns ready.

 

Oh, ET is just a soft, lovable kitty

 

So, car sitting in the shop with "cold" tires, do you start with 26? 28?

Ron ...

 

Read the information placard on your door driver's door, or read your owner's manual, or read the shop manuals or read the quote from GM. Lots of folks have lots of opinions of this. GM (who designed and engineered the car) has a very educated opinion. Follow the placard!

 

That would be to damn easy. Can't we please make this complicated?

 

Worst thing you can do is over-inflate:

 

I need to start using my smileys. You're having all the fun.