I have Z06 Chromie rims with the Goodyear Eagel F1-GS EMT. Whatt is the best air pressure? Just to drive around town daily.

Thanks,
-Jeremy.

 

TTT Important that I find out ASAP.

 

30 PSI Cold

 

Should be a sticker in the door jamb or on the door itself or possibly somewhere else telling you what pressure to use on that particular vehicle. The sidewall of your tire states what the maximum pressure can be but it differs from car to car so thats why you use the pressure GM says to us as tested by the GM engineers...( I think its 30 lbs after sitting for at least 4 hrs )

 

Well thats the problem...There is no door sticker? I don't know why.

 

OK I see..then I can tell you that that GM says my '04 Goodyears should carry 30 lbs from cold...so I would say 30 lbs for yours also

 

Well I live In Florida so it's hot. lol

 

well I can tell you this...even if you live where its hot you should put the same pressure in the tires after the car has been sitting for at least 4 hours and maybe do it in the evening when the temp goes down a bit and your vehicle is out of the sun...

 

Thanks smart ***!! LOL Just kidding, thanks for your help. So, I have a FRC '99 as you know, I live in Florida and I have the Supercar Eagel F1's and I should have 30psi all around?

 

Good place to start and then watch the treadwear. Add a few pounds if the wear is on the sides. Take out a few if the wear is in the center. My guess is you will get very even wear at 30 PSI cold.

 

30 cold has always given me even wear. But for some reason the back don't seem to last as long.

 

In Texas.....run 28psi cold in both my cars. Gain 2 psi on the road.

 

I live in Florida too and run 30 all around. I've heard from a few people that's the magic #.

 

...YES

 

Cold tire pressure means Nothing.. if the car is stopped and the tires are cold.. you wont get any performance or good mileage out of them because they are stopped.
Every Racing organization, be it formula 1, Nascar, NHRA, all check road, or track conditions, and adjust the tire pressure according to those conditions. I've talked with Nascar crew chiefs abut tires and pressure.. They constantly check track temperatures so they can adjust the tire pressure which is critical to performance and tire mileage,.
one pound can make the difference in running out of rubber or loosing it in the corner.. IF your looking to get a few extra laps out of your tires, then you should pay attention to conditions too...
Could you imagine if all race cars set their tire pressure at 30 cold...
If you set your tires at 30 Cold.. then go out on a Georgia asphalt highway in a 90+ DAY...that surface can reach temperature as high as 160F... your 30 psi cold can Quickly turn into 34/36 psi... now your tires are high in the center too much pressure.. you loose equal contact pressure.. so many people drive a corvette in the summer.. where tire pressure and road surfaces temperatures can change so much. how can a guy in North Dakota in the winter at -5F and a Guy in Georgia in the summer at 90+F use the same cold tire pressure..
the guy in North Dakota will see his 30 psi go to 27, and they guy in Georgia will see 34/36.. and expect to get the same performance..
The secret to performance and especially tire longevity is Not cold tire pressure but Hot tire pressure.. ( this is the pressure your tires see while actually in motion) I never allow my tire pressure to exceed 30 psi..So in the summer when its hot.. I put 26 psi cold, and in five minutes they are up to 30...
in the winter I make sure they stay at 30 while driving and adjust accordingly...
I keep my car in the garage... and check it there.. winter time driving is not as critical as summer driving..
I don't adjust my tire pressure daily.. but in the summer.. here in the North east we can see hot days... with hot blacktop surfaces.. I lower the cold pressure to adjust for the conditions.. the DIC gives you this input... so if your tires are 34/ 35 you need to take some air out..
I got 43,000 miles out of my first set of EMT's, Other who have accepted this discipline have also seen much greater performance and tire longevity..
Its the conditions, Not a sticker on the car door... Just remember all race cars adjust for conditions not only for performance.. but for mileage (fuel economy) and for tire life.. get a few extra laps from your tires... watch their pressure.especially when it gets in the 80's and 90's.
The End

 

Cool. I learned something today!

 

Thanks for explaining this. The DIC is important to watch as you drive. I get the best performance by making the wife crawl out on the hood to let air out to keep it at 30 PSI while doing 80 MPH. She hates it when I corner and break. It is a real challenge to catch the little valve stem tho.

30 PSI is a good starting point and adjust from there. If you are on a banked track and only making turns in one direction, you might want to adjust differently.