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06-02-2007, 07:18 AM
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#1
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Registered Member
Join Date: Jun 2007
Posts: 1
Country: United States
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tire pressure/new membership
hello fuel economists!! i have a '03 subie baja, it's too new to start strapping on air dams and sheet metal. but, will increasing tire psi help? i see some of u are up to 55-60 psi, thats alot. has it helped??
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06-02-2007, 07:29 AM
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#2
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Registered Member
Join Date: May 2006
Posts: 443
Country: United States
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Welcome to the site.
Yes the increased psi helps. Ive ran close to or max sidewall psi for years.
psy
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09 HCHII, w/Navi
07 Mazda3 S Touring, 5MT
Mild Hypermiler or Mad Man?
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06-02-2007, 10:15 AM
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#3
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Supporting Member
Join Date: Dec 2006
Posts: 760
Country: United States
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it helps a TON. you can P&g so much farther and it just helps on rolling resistance. try to go up to your max side wall and go from there. i run mine at 48-50 psi
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06-04-2007, 10:06 AM
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#4
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Registered Member
Join Date: May 2007
Posts: 26
Country: United States
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I understand some of you hypermilers use probably a harder compound tire than say I would... but doesn't over inflating cause uneven wear on the wires?
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2001 Z28 Camaro 5.7L 6 speed 550hp avail All day everyday while getting 30mpg highway
1993 Subaru 1.8L 5 speed
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06-04-2007, 12:55 PM
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#5
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Registered Member
Join Date: Jun 2007
Posts: 1
Country: United States
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Further more, how safe is it? I have my kids in the car at times. I don't know how many of you drive these cars with your family in it? Is there a brand of tire which is better than others, but not a high dollar tire? I have a 93 Acura Vigor. Any ideas about increasing mileage? If I need to post in another thread, let me know.
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06-04-2007, 01:43 PM
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#6
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Registered Member
Join Date: May 2007
Posts: 26
Country: United States
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I have always ran 32psi or so in my tires with great results, obviously I drop it down in the rear for traction when racing but that is another bird. I like 32psi for road trips cross country in any vehicle. Inflating more to like 45-50 if its within the tire than I don't think that would be a real problem although I have done little testing on the subject. I know a tire with LOW air pressure will get real floaty on the interstate.
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2001 Z28 Camaro 5.7L 6 speed 550hp avail All day everyday while getting 30mpg highway
1993 Subaru 1.8L 5 speed
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06-04-2007, 01:51 PM
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#7
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Registered Member
Join Date: May 2007
Posts: 26
Country: United States
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Quote:
Originally Posted by rmeanor
Further more, how safe is it? I have my kids in the car at times. I don't know how many of you drive these cars with your family in it? Is there a brand of tire which is better than others, but not a high dollar tire? I have a 93 Acura Vigor. Any ideas about increasing mileage? If I need to post in another thread, let me know.
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this hypermiler stuff is new to me, but I would think a harder compound tire would help... many good tires out there.
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2001 Z28 Camaro 5.7L 6 speed 550hp avail All day everyday while getting 30mpg highway
1993 Subaru 1.8L 5 speed
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06-04-2007, 02:15 PM
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#8
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Registered Member
Join Date: Mar 2007
Posts: 1,138
Country: United States
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I would not worry at all running a tire at its max sidewall pressure. I mean, that is why the rating is there. The tire generates less heat at the max than at the car manufacturer's recommended inflation. But, you would want to try it for yourself, see how the car handles, etc. We have driven almost 100k miles on our family minivan with the tires set above the car mfg's recommendation, some at 38 psi in 44 psi max tires, and some at 35 psi in 35 psi max tires.
As far as wear, most cars tend to wear out tires on the edges first, so inflating to higher pressure can actually help even out the wear. I have never seen anyone report that inflating to a higher pressure caused the tire to prematurely wear out in the middle. It just doesn't happen.
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06-04-2007, 07:15 PM
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#9
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Registered Member
Join Date: Mar 2006
Posts: 675
Country: United States
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I wouldn't go so far as to say it doesn't change the wear pattern. However, I am running 55psi and the only way I can tell the tires are wearing in the middle is because the tires are down to the thin side, so a 1/32 or 1/16 is now noticable. I get far more wear from my rear tires which are running with a bit of slack in the camber angle. As far as safety, I haven't encountered anything, yet that makes me feel it's a significant risk.
As far as the tires go, you can get LRR tires, and I might consider that when I need to get replacement tires. However, at the moment I am running whatever they happen to have available as used tire's. I think their Bridgestone, at the moment.
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06-28-2007, 11:14 PM
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#10
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Registered Member
Join Date: Apr 2007
Posts: 21
Country: United States
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why is it i have read people r putting more air up front and just a tad less n the rear
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