RE: Random Chat Thread
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RE: Random Chat Thread - 7/24/2008 6:57:43 AM
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UrbanmanUSA
Posts: 556
Joined: 2/19/2007
Status: offline
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From a pure MPG standpoint, wouldn''t you want as much tire pressure as possible in every tire to reduce rolling resistance?
My tires say max 44 psi. Allowing a 15% factor for cold versus hot (the air in tires heats up as you drive, as I''m sure you all know), I would want to put at most 38 psi cold in any tire (1/1.15 x 44). Does this calc make sense?
Now, I have heard some in this time of high fuel prices pump their tires up to 60 and 70 psi in an effort to max the reduction in rolling resistance. Even if the tire can safely take this (big if, imo), I would think there would be a great sacrifice in handling/grip and maybe even ride (your basically riding around on rocks if the tires have that much air in them).
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If liberty means anything at all, it means the right to tell people what they do not want to hear. - George Orwell
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RE: Random Chat Thread - 7/24/2008 9:22:26 AM
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sstlaure
Posts: 2343
Joined: 11/28/2005
Status: online
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I would never exceed the maximum recommended tire pressure.
Yes, increased tire pressure reduces rolling resistance, it will also cause your tires to balloon. An over-inflated tire with wear out the tread in the middle of the tire before the rest of the tire. Your contact patch with the road would also get narrower as the outer treads lose contact with the road due to ballooning.
Your ride quality would also decrease as there would be less give in the tire to absorb minor road vibrations.
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2004 Mazda6 Sportwagon
Any statements made are purely my opinion
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RE: Random Chat Thread - 7/24/2008 10:26:55 AM
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VB
Posts: 785
Joined: 6/17/2007
From: New York, New York
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quote:
ORIGINAL: sstlaure
I would never exceed the maximum recommended tire pressure.
Yes, increased tire pressure reduces rolling resistance, it will also cause your tires to balloon. An over-inflated tire with wear out the tread in the middle of the tire before the rest of the tire. Your contact patch with the road would also get narrower as the outer treads lose contact with the road due to ballooning.
Your ride quality would also decrease as there would be less give in the tire to absorb minor road vibrations.
I''ve dropped down to 30F/30R for now, actually...the recommened PSI for these tires.
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RE: Random Chat Thread - 7/24/2008 4:02:07 PM
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virgin1
Posts: 4933
Joined: 3/15/2007
Status: online
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That can''t be the max for the tire, but probably the recommended psi by the manufacturer (Chevy) for the Bu. I have always found mnf''s suggested pressures too soft.
Try pumping up the front to 34 and see how the car handles. (<<< Suggestion only.)
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 "There is no tool you can buy that will replace experience." - Josh Mills, C.K.DeLuxe
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RE: Random Chat Thread - 7/25/2008 12:08:18 AM
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VB
Posts: 785
Joined: 6/17/2007
From: New York, New York
Status: offline
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quote:
ORIGINAL: virgin1
That can''''t be the max for the tire, but probably the recommended psi by the manufacturer (Chevy) for the Bu. I have always found mnf''''s suggested pressures too soft.
Try pumping up the front to 34 and see how the car handles. (<<< Suggestion only.)
It''s worth a shot. I''ll try it tomorrow before work.
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RE: Random Chat Thread - 7/29/2008 4:05:19 PM
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ELSALV39
Posts: 53
Joined: 6/20/2008
Status: offline
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 cant post!!!!!!!!!!!
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RE: Random Chat Thread - 7/29/2008 4:06:35 PM
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ELSALV39
Posts: 53
Joined: 6/20/2008
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 maybe now!! doing fine after 5.4 earthquake that hit here in southern california.
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