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Unread 05-22-2013, 11:59 PM   #16
alfaitalia
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Originally Posted by cde02ltd View Post

Doesn't the tire pressure system start screaming at you? If I put 40 or more in mine, once you get on the highway the. Pressure increases, and the evic goes nuts when the tires hit 44psi. Have you found a way to adjust when it goes off?
I've never seen a UK spec WJ with a tire pressure warning system so not a problem for me. No doubt one of the UK boys will say they have it but certainly not on my 04 Ltd CRD!

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Unread 05-23-2013, 12:06 AM   #17
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Originally Posted by lazyWJ View Post
If you could inflate the tire to the point that it didn't touch the ground at all, you could generally expect to see less than 10% increase in your fuel economy. In other words, if you're getting 15mpg now with properly inflated tires, filling them with flubber so they float above the pavement could net you about a 1.5mpg increase. Adding any amount of air beyond proper inflation will land you somewhere in between those numbers. Something to keep in mind for perspective.
Being a crd I started with about 30 miles per UK gallon. Have gained about 1.5 per gallon so far and not expecting much more so you are probably right. Sharper on road handling is nice though!
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Unread 05-23-2013, 07:18 AM   #18
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On my E load tires I noticed a pretty big improvement in road feel by going from 32 to 38 psi, so it doesn't take much. Although I'm sure there was a slight gain in fuel economy to go with that, it's difficult to measure accurately when I'm only getting 14 mpg to start with
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Unread 05-23-2013, 07:28 AM   #19
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I run my 245/75R16 DuraTracs at 29ish for an even contact patch. Sometimes I'll bump it up to 32 if I'm taking a long interstate trip. I've aired them down to 11 without breaking a bead on stock rims though I'd suggest a little more than that 'just in case' for that scenario.
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