I have Mish Pilot Sport A/S Plus on the '03 vert and want to know do I hold the Cold Pressure at 30 psi or do I keep it a bit lower~ 28 psi? My low pressure came on today on L Frnt was 24 - funny cause I was actually heading out to put air in all/check all, "My Vette and I are in the "zone"" any thoughts or just follow the door jam readings of 30 psi thanks

 

30 PSI cold inflated. Remember during the Winter months you loose 1 PSI for every 10-degrees of temperature drop.

Check the PSI cold with the change of seasons.

 

excellent,thanks, yes we had a change in temp here and I think that's what set it off. My DD Nissan pressure sensor went off yesterday too. Thanks

 

If you haven't by now... consider purchasing an inexpensive electric air compressor and a good digital or analog tire pressure guage.

Two cheap "tools" that are priceless.

Good luck.

 

Before buying my Michelin PS A/S ZPs I called Michelin. They advised me to add 4 or 5 pounds MORE to the tires so like 34 or 45 pounds cold.
I have been doing so for over 3 years and have not found any evidence of wearing out the tread in the middle which you might think would happen.
Try calling them and see what they say today.
BIGHANK

 

...you cannot be serious?...even 34 cold will heat up in the summer to 38+ and that will ware the center out not to mention a lack of tread contact with the road...so whats with 45 pounds



30-31 hot is the correct pressure in my opinion...flame suit on

Excited about hearing more responses

 

Yeah I did a double take at the 34-45 lbs. Not sure about that. Anyway, put air in and drove it about 5 miles and read the DIC and was at about 30-31 psi all around, then cross checked that against my hand gauge. will check this morning at cold/cold.
Aside story - have a little compressor, but just jumped in and went down to the corner station/repair/body shop and was going to use the air station there (the 2 quarters deal). Of course the thing was jammed with someone's nickle! The body shop guy was out in front leaving for the day , and he told me to drive over and he let me use his air line and gauge while he waited to go home. Oh for the love of the Vette!

 

I am a tire pressue NUT. I check my pressure twice a week and monitor my tire wear constantly. I set my pressure differently throughout the year but ALWAYS to give me 31 pounds HOT.
I get great, even wear on my tires and have no handling issues.

 

30 psi cold should be a good setting for those tires. I keep my Goodyears at that pressure and the tires have worn evenly and the ride is good.

 

I run at 30 psi..........

 

I run my tires at 30 PSI HOT.. Always. Dont ask me why.. Ive already posted the reasons over 1 thousand times here on this forum over the last ten years.

 

I agree with 30 PSI cold. I bought a cheap air compressor that I use & check my tires once a month unless extreme temp changes (changing seasons). If I could buy my compressor again I would get one with a tank as the compressor makes a lot of noise as it runs all the time while in use...34 to 35 PSI cold seems too high to me also.

 

Just replaced rear PS + AS ZP's yesterday with no tread down the middle. Those tires had 23,500 miles on em. Always ran 30 psi cold, now will adjust to 30 psi hot and monitor wear monthly. $651.41

 

I get 40,000 miles out of a set of tires, using this tried and true method of tire pressure tuning.
I got 43,000 miles out of my Original Goodyear F1's I could have got 45,000 miles out of them.

30 PSI COLD is for sissy's.

You have a factory built race car so treat it like all the professional pit crew do and that is set the tire pressure for the prevailing conditions.

Only Idiots would think that a cold pressure setting set at 30 PSI cold and would increase to 38 PSI on a 95 + day where surface temps on a black top road can see 140F.. and to those days when you set them in the afternoon to 30 PSI cold @ 35 F and it gets down to -20 at night in Fargo North Dakota, and can take your tires down to 26 PSI. And then give some logical reason why the actual temp of these two conditions one being 38 PSI and the other being 26 PSI both set at 30 PSI cold could result in no change in performance. Any professional race car driver will tell you that one psi can make all the difference in getting those few extra laps out of the tires or a few extra laps of fuel because the tires are performing at the proper pressure " HOT".. so for all the Idiots out there please use the idiot sticker.. 30 PSI Cold. no matter what the conditions of the actual use become. We called that sticker the idiot proof sticker at GM... because people were using the sidewall and putting 45 lbs of pressure in the tires only to have the DIC throw a code.

I wasn't going to do it again but I did... sorry.. its just a pet peeve ...

 

Angelo, I'm a tire nut too. But I only check my tire's pressure COLD and haven't had any problems maintaining a cold tire pressure of 30 PSI.

When tracking past cars while upping the PSI tire pressures were checked COLD also.

Huurraah!
Bob

 

Obviously , you don't have to adjust your tires daily or even weekly , and maybe only monthly.. the tire pressure is calculated by the amount of weight the tires have to carry divided by four... IN the case of a stock C5 30 PSI is ideal. But.... Only when you are actually driving the car.. so in the Hot summer months if you are seeing 90/95+ days make sure that your cold pressure reading is set low enough to insure 30/31 psi when you are actually using them. this will give you the best contact patch and the best performance, and the proper stability to insure the best mileage and fuel economy... Same thing in the cold months you want to make sure that your actual driving conditions yield 30 PSI. Cold tire can decrease in pressure when they get cold sitting.. don't worry about a low initial pressure reading at 27 psi. soon as the cycle they will see 30 PSI.. if they don't reach 30 psi adjust the pressure by what ever it takes to get there.. Never worry about the tire pressure when they are cold.. only when they are actually performing for you. Now doesn't that seem pretty simple? And you all call yourself car people. Even my 8 year old grandson understands the science here.
Lovingly brought to you by
ET aka ET

 

Bill, if it's 100-degrees out tires should be set at 30 PSI COLD.

If it's 20-degrees out tires should be set at 30 PSI COLD.

Now I don't know where you're getting all this crazy stuff...

 

I agree with Bill. I start at 28 cold on my PS2's and then adjust to wear.

 

This is exactly to the point... when your cold tires @ 30 psi actually get their run temperature on a hot day and see 38 psi like they will on a 90/95+ day. the tires becaome convex ( grow in the middle because of extreme tire pressure created by the heat of the day). with the tires in this condition you lose 40 % of the footprint and contact patch, your ten inch wide tire patch is reduced to 6 inches, you lose traction and stopping performance.This also is the reason so many people here see the centers of their tires wearing out before the other 60 % of the tire.
If you want your car to perform like it should keep the tires at 30 PSI hot.. It doesnt matter what your tire pressure is when they are cold.. only when they are actually being asked to do what they were designed to do, run at actual driving conditions and temperatures. For many people a Corvette is a summer car. it can get hot in Texas, and Arizona , and Georgia.. those hot asphalt roads can fry and egg.. and increase your tire pressure dramatically.. You do not want to be running around with 38 psi in your tires.
The End

 

I spent 5 years developing and designing this car from 1995 through launch in 1997 and then two years of field debugging at the Engineering support level before retiring..I have seven designs in every C5 on the planet and collaboration in many other designs through failure modes effects analysis. FMEA's.