tire pressure
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Instructor
Joined: Apr 2006
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From: SD
tire pressure
I'm a new member, I have a 2002 convertible, just put new wheels & tires on with new sensors as well, my tire guy said that the goodyear tires recommend 44 psi back & 42 front cold pressure.
I said your crazy. The book says 32psi front and rear, what is the tire pressure to be, help me out.
I said your crazy. The book says 32psi front and rear, what is the tire pressure to be, help me out.
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Your tire guy is nuts. You'll be putting a new set on in no time with that kind of pressure. The door panel says 30 psi cold, but many here go with 30 psi hot. I'd recommend the latter since those that run it like that report very, very good tire life.
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You said right. He's nuts. Follow the guidelines for the tire and look at the sticker on the door for proper tire pressure. Running at 44PSI is about 14 PSI more than recommended. (Hot/Cold different pressures.) Stick to the recommended guidelines.
BTW Welcome to the Forum
BTW Welcome to the Forum
Thread Starter
Instructor
Joined: Apr 2006
Posts: 200
Likes: 0
From: SD
Tire Pressure
Boy, this is fun having all this information. like I said I'm new to the corvette world, chevelle's have always been my passion but in the last year and a half I have purchased 2 vets.
fun cars for sure.
I will be asking plenty more questions for sure.
thanks again for all the info.
fun cars for sure.
I will be asking plenty more questions for sure.
thanks again for all the info.
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Thread Starter
Instructor
Joined: Apr 2006
Posts: 200
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From: SD
tire pressure
Thats correct, sidewall (cold) pressure. He argued with me about it, I said to him the tire sensors keep flashing to much pressure or something to that effect, his answer was I have sold more tires than you will ever hope to use in you life time.
Well finally I just left, I was out lst weekend driving around with 34 front 36 rear noticed about 2psi gain in both f & R.
So should I just run cold pressure of 30 all around.
Well finally I just left, I was out lst weekend driving around with 34 front 36 rear noticed about 2psi gain in both f & R.
So should I just run cold pressure of 30 all around.
Drifting
Joined: Jul 2002
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From: Indiana
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I ran 30 cold in my OEM Goodyears and did over 40K on them with several instances of mischevious abuse
.....OK so they needed replaced earlier.....but they never let me down.
I'm running Michelin PS ZP's now and I just lowered them to 28 cold in the back....and may go lower yet. 40+ is just flat
....Unless you like burning them up easily
.....OK so they needed replaced earlier.....but they never let me down.I'm running Michelin PS ZP's now and I just lowered them to 28 cold in the back....and may go lower yet. 40+ is just flat
....Unless you like burning them up easily
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CF Member Evil Twin (who is familiar to some of the longer term members) is a retired engineer that worked on the C5 project has stated here many times to run your tires (regardless of the brand, regardless of whether they are run flats or not) at 30psi hot. There is a sticker on the driver's door that states 30psi - cold. As E-T puts it - it's a product liability sticker.
The reality is for the best performance of the tire, and longest wear, you should adjust your tires so that when they are at operating temperature, they are at 30 psi. So in the summer, when the pavement is hot - that might mean adjusting the pressure to 26 psi cold. In the winter when the pavement is cold, you might need to run 28 psi.
E-T has gotten excellent wear out of his OEM tires utilizing this method. If you are a NASCAR fan - you'll notice the crew chiefs measuring tire temperature and adjusting pressure accordingly. Many a race has been won by correctly managing tire pressure. The correct pressures will result in longer life, optimal footprint and traction.
This man knows what he's talking about, the proof is in the pudding. In this case the proof is in the rubber.
How'd I do - Bill?
The reality is for the best performance of the tire, and longest wear, you should adjust your tires so that when they are at operating temperature, they are at 30 psi. So in the summer, when the pavement is hot - that might mean adjusting the pressure to 26 psi cold. In the winter when the pavement is cold, you might need to run 28 psi.
E-T has gotten excellent wear out of his OEM tires utilizing this method. If you are a NASCAR fan - you'll notice the crew chiefs measuring tire temperature and adjusting pressure accordingly. Many a race has been won by correctly managing tire pressure. The correct pressures will result in longer life, optimal footprint and traction.
This man knows what he's talking about, the proof is in the pudding. In this case the proof is in the rubber.
How'd I do - Bill?
Melting Slicks
Joined: Nov 2005
Posts: 2,071
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From: clackamas oregon
Originally Posted by blacksedan87
CF Member Evil Twin (who is familiar to some of the longer term members) is a retired engineer that worked on the C5 project has stated here many times to run your tires (regardless of the brand, regardless of whether they are run flats or not) at 30psi hot. There is a sticker on the driver's door that states 30psi - cold. As E-T puts it - it's a product liability sticker.
The reality is for the best performance of the tire, and longest wear, you should adjust your tires so that when they are at operating temperature, they are at 30 psi. So in the summer, when the pavement is hot - that might mean adjusting the pressure to 26 psi cold. In the winter when the pavement is cold, you might need to run 28 psi.
E-T has gotten excellent wear out of his OEM tires utilizing this method. If you are a NASCAR fan - you'll notice the crew chiefs measuring tire temperature and adjusting pressure accordingly. Many a race has been won by correctly managing tire pressure. The correct pressures will result in longer life, optimal footprint and traction.
This man knows what he's talking about, the proof is in the pudding. In this case the proof is in the rubber.
How'd I do - Bill?
The reality is for the best performance of the tire, and longest wear, you should adjust your tires so that when they are at operating temperature, they are at 30 psi. So in the summer, when the pavement is hot - that might mean adjusting the pressure to 26 psi cold. In the winter when the pavement is cold, you might need to run 28 psi.
E-T has gotten excellent wear out of his OEM tires utilizing this method. If you are a NASCAR fan - you'll notice the crew chiefs measuring tire temperature and adjusting pressure accordingly. Many a race has been won by correctly managing tire pressure. The correct pressures will result in longer life, optimal footprint and traction.
This man knows what he's talking about, the proof is in the pudding. In this case the proof is in the rubber.
How'd I do - Bill?
i actually have been doing this since seeing his post #312 or so. mine seem to be doing great. one thing you did forget to mention is that with running them at 30-31 hot. you actually help a bit with the bump steer problem. since the tires actually will have some give to them, it takes a little of the bump from the hole/ road surface change. so the suspension doesnt have to bear all of it.
Last edited by rgtkst; Apr 13, 2006 at 10:32 PM.
Melting Slicks
Joined: Jan 2004
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From: NW Chicago, IL/Clearwater Beach, FL
my question is? i just installed the kuhmo's non run flats and the sidewall's read 51psi max......i called kuhmo and asked them what PSI should i run? that the installers told me 38-40 psi min., they told me i should not run anything less than 40 psi in a 51 max psi tire. they said if i run the 30psi in a 51 max psi tire like chevy says i would over heat the tire and ruin the sidewall's and voiding any warranty 
what psi in a non run flat, 51 psi max tire should i run?
what psi in a non run flat, 51 psi max tire should i run?
Instructor
Joined: Oct 2002
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From: Moore SC
The first time I changed my tires, I put on non run flats ant the tire guy said inflate to 38-40 lbs. Didn't take long for the sensor alarm to tell me I was over inflated. I keep mine aroung 30 cold, allows for some gain when hot without reaching the alarm pressure, which in my car seems to be 40.
Melting Slicks
Joined: Nov 2005
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From: clackamas oregon
Originally Posted by birch64
my question is? i just installed the kuhmo's non run flats and the sidewall's read 51psi max......i called kuhmo and asked them what PSI should i run? that the installers told me 38-40 psi min., they told me i should not run anything less than 40 psi in a 51 max psi tire. they said if i run the 30psi in a 51 max psi tire like chevy says i would over heat the tire and ruin the sidewall's and voiding any warranty
what psi in a non run flat, 51 psi max tire should i run?
what psi in a non run flat, 51 psi max tire should i run?
they cant tell by the max psi on the side wall. you need to take into consideration the weight of the car also. you put that much wind in there and you will end up ruining your tires also. not to mention your teeth from the jarring of way over inflated tires. they will also do as others have said and turn on your tire monitor over inflate sensor alarm
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Originally Posted by birch64
my question is? i just installed the kuhmo's non run flats and the sidewall's read 51psi max......i called kuhmo and asked them what PSI should i run? that the installers told me 38-40 psi min., they told me i should not run anything less than 40 psi in a 51 max psi tire. they said if i run the 30psi in a 51 max psi tire like chevy says i would over heat the tire and ruin the sidewall's and voiding any warranty
what psi in a non run flat, 51 psi max tire should i run?
what psi in a non run flat, 51 psi max tire should i run?
Does the warranty specifically state that you have to run the tires at a minimum pressure in order for the warranty to remain valid? Did they give you a copy of Kumho's specifications?
My Michelin PS2's state to follow the manufacturer's recommendations on the tire placard on the vehicle and to not inflat beyond 40 psi.
Do your Kumhos state a similar message about following the vehicle manufacturer's tire placard? And as rgtkst stated - how does Kumho know the vehicle's weight on which the tires are installed, or the vehicle manufacturer's recommended tire pressure?
Melting Slicks
Joined: Jan 2004
Posts: 2,284
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From: NW Chicago, IL/Clearwater Beach, FL
Originally Posted by blacksedan87
Mike - those numbers on the sidewall indicate the maximum pressure the tire should be inflated to. I don't have Kumho tires, but I think you'll find that the car rides hard, exhibits bumpsteer like rgtkst stated, and that your tires will wear in the middle if you run them at 40psi. I still think you should run the tires at 30 psi hot +/- 1 psi.
Does the warranty specifically state that you have to run the tires at a minimum pressure in order for the warranty to remain valid? Did they give you a copy of Kumho's specifications?
My Michelin PS2's state to follow the manufacturer's recommendations on the tire placard on the vehicle and to not inflat beyond 40 psi.
Do your Kumhos state a similar message about following the vehicle manufacturer's tire placard? And as rgtkst stated - how does Kumho know the vehicle's weight on which the tires are installed, or the vehicle manufacturer's recommended tire pressure?
Does the warranty specifically state that you have to run the tires at a minimum pressure in order for the warranty to remain valid? Did they give you a copy of Kumho's specifications?
My Michelin PS2's state to follow the manufacturer's recommendations on the tire placard on the vehicle and to not inflat beyond 40 psi.
Do your Kumhos state a similar message about following the vehicle manufacturer's tire placard? And as rgtkst stated - how does Kumho know the vehicle's weight on which the tires are installed, or the vehicle manufacturer's recommended tire pressure?
there only a week old and I'v been keeping them at 30psi. I'v contact GM on the issue and they told me some BS that they only recommed a run flat tire that the psi should be at 30. could'nt help me with any other info about any other tire to call the tire company which i did and they told me the 40psi....for now they will stay at 30psi and i'll see how the tires wear......
Le Mans Master
Joined: Oct 2005
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From: Kailua HI
Originally Posted by birch64
my question is? i just installed the kuhmo's non run flats and the sidewall's read 51psi max......i called kuhmo and asked them what PSI should i run? that the installers told me 38-40 psi min., they told me i should not run anything less than 40 psi in a 51 max psi tire. they said if i run the 30psi in a 51 max psi tire like chevy says i would over heat the tire and ruin the sidewall's and voiding any warranty
what psi in a non run flat, 51 psi max tire should i run?
what psi in a non run flat, 51 psi max tire should i run?
The dealer suggested 37 pounds cold in my new tires.