Tire pressue

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Dec 11, 2006 | 12:17 PM

#21

crabby

Instructor

Joined: Jan 2006

Posts: 170

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From: Sioux City Iowa

St. Jude Donor '06

The reason people mess with it is due to a specific need. Although the C6 does not carry much there is still the variable of driving style which alters the tire wear. For example, as previously mentioned, the tire increases pressure with driving and ambient temp. So short trips in a cold climate results in more edge wear and less wear in the center. In vehicles with load capability, the recommended range changes with load, but the physics still apply. There is no one perfect setting. And, in some vehicles the manufacturer will post under the actual 'better' number to provide a better ride. I do agree that the door post is a good place to start, but environment, personal driving style, and other factors may dictate an adjustment.

Dec 11, 2006 | 12:40 PM

#22

Dave S

Retired & lovin' it!

Joined: Mar 2005

Posts: 4,475

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From: Jackson NJ

I've got a couple of pencil type guages that I picked up at a highway auto parts store (R&S Strauss for those in the northeast) for $2 or $3 & an analog dial guage from Sears that I got on sale for $10 or $12. Interestingly, they all read within 1/2 lb of each other & the DIC gives me the same reading (rounded to the full pound). So that says to me "don't get yer shorts in a knot over an air pressure guage". Anything is better than nothing & they all seem to be acceptably accurate. As for tire pressures....yes, the door post label says 30 lbs cold for the C6, but I like to run a bit higher at 32 lbs. Bit of a stiffer ride, but over the years, I've come to believe that a sightly higher pressure will yield better tire mileage without sacrificing handling. Most of the gas stations in my area now have only coin operated air machines which are a PITA....I found a small 120v compressor (non-tank type) on the internet for about $25, which works fine.

Dec 11, 2006 | 01:02 PM

#23

talon90

Team Owner

Joined: Aug 2002

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Tech Contributor

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St. Jude Donor '05-'06-'07-'10

Quote:

Originally Posted by crabby

I agree. My post was directed at the daily driven pleasure car. Track days and autocross as an example have specific needs. We found after years and many, many such threads that 30 psi warm on first generation runflats would give the best combination of ride and tire life. The 30 psi cold is the manufacturers recommendation and it is quite easy to maintain. Additionally, this number of 30 psi cold takes into account environment and some of the factors but does not address "special cases". I will however offer that it is the individual that knows he/she needs to address special cases, that wouldn't be asking the question either as they are likely informed as to the need and the requirement.

Dec 11, 2006 | 04:25 PM

#24

mikesul

Drifting

Joined: Feb 2006

Posts: 1,531

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From: Deerfield Beach FL

Mines a DD around S Florida. I keep my PS2's at 32 psi cold. They typically end up at 36 psi after running errands, etc.

Dec 11, 2006 | 04:57 PM

#25

S2K

Melting Slicks

Joined: Mar 2004

Posts: 2,130

Likes: 5

From: Seattle WA

I completely ignore the DIC. It's almost useless. I am happy with either my $10 digital or cheaper pencil style gauge. It's not like I am tracking the car and need ultimate precision. Also, I don't bother with the gas station fillers or a compressor. Unless you seriously let the tires go (and I mean to the point of being flat), you can very quickly top them off with a bicycle pump.