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Old 01-11-2011, 02:25 AM   #15 (permalink)
EcoModding Apprentice
Join Date: Oct 2010
Location: Ivins UT
Posts: 213

the green machine :P - '97 Jeep Grand Cherokee ZJ
90 day: 20.92 mpg (US)

Thee s10 - '00 Chevy S10
90 day: 24.27 mpg (US)

Freedom - '05 Kawasaki Ninja 250EX
90 day: 75.55 mpg (US)
Thanks: 2
Thanked 22 Times in 20 Posts
Check out this explination on tires and there psi to weight figures
it says u can guess pretty close to the weight of your vehicle just by looking at the area of your contact patch and yes i understand that your not going to be exact or anything with that calculation but i think you would get pretty dang close. I don't think that friction with the road is all RR is about but if you increase the tire pressure not only are u decreasing the contact with the road but the amount of deforming the tire does therefore less energy converted to heat in the tire now if you could get class D tires with 80Psi max and with the low rolling resistance material then you'll have really good FE gains. i got the idea from watching mythbusters the other night they took tires that had a max psi of 35 and increased it to 40 and got a 6.5% increase in FE and thats 2 points better then the best LRR tire i've seen so far but if you find a better one then let me know ok.(and yes i know i'm not goin psi to psi ok but it steal works)
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