05-22-2011, 11:37 PM
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#81 (permalink)
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Master EcoModder
Join Date: Feb 2010
Location: CT, USA
Posts: 544
RaceJeep - '98 Jeep Grand Cherokee (ZJ) 5.9 Limited 90 day: 13.62 mpg (US)
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245/70R16 Firestone Destination A/Ts (44psi max sidewall). I normally run 44 front, 40 rear, although I've pushed them up to 46/44 when towing, and run 46/42 once for handling purposes (a little extra air tightens the front end up a good bit).
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Call me crazy, but I actually try for mpg with this Jeep:
Typical driving: Back in Rochester for school, driving is 60 - 70% city
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05-23-2011, 12:11 AM
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#82 (permalink)
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Master EcoModder
Join Date: Jul 2010
Location: Canada
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I've actually lowered the tire pressure to 35 from 40. The reduced ride comfort and the constant rattling were getting on my nerves.
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05-23-2011, 01:03 AM
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#83 (permalink)
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Do more with less
Join Date: Jul 2010
Location: North Eastern Missouri
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If the police do it then it must be legal and safe.
I love it Bob, You drive two prius' and shoots guns with big flames My wife has an M44 that does that. Economy with firepower. My cars look too much the part.
Quote:
Originally Posted by bwilson4web
My understanding is police crusers also run over max pressure tires. It gives them more precise handling, longer life, and a little more performance from the lower rolling drag.
In my case, maximum sidewall pressure, 51 psi, accomplishes my goals so I'm happy. But I would have no problem with running up to 60 or 70 psi.
Bob Wilson
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“The further a society drifts from the truth, the more it will hate those that speak it.” George Orwell
“Before a standing army can rule, the people must be disarmed; as they are in almost every kingdom in Europe.
The supreme power in America cannot enforce unjust laws by the sword; because the whole body of the people are armed.”
– Noah Webster, 1787
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04-11-2014, 08:00 PM
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#84 (permalink)
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hypermiller somewhat.....
Join Date: Oct 2013
Location: nova scotia
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I am running at 44 PSI (max sidewall) all around on my winters, which are coming off this weekend. I will go max sidewall on my P4's too. 205/55/16's
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04-12-2014, 03:23 PM
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#85 (permalink)
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Master EcoModder
Join Date: Dec 2012
Location: Pennsylvania
Posts: 506
Woody - '90 Mercury Grand Marquis Wagon LS Last 3: 19.57 mpg (US) Brick - '99 Chevrolet K2500 Suburban LS Last 3: 12.94 mpg (US) M. C. - '01 Chevrolet Impala Base 90 day: 18.73 mpg (US) R. J. - '05 Ford Explorer 4wd 90 day: 16.66 mpg (US)
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With Boxy, 35/36 cold and 39/40 hot until new tires are put on.
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04-12-2014, 03:42 PM
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#86 (permalink)
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Master EcoModder
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45.
regards
Mech
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04-12-2014, 04:19 PM
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#87 (permalink)
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Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
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60+ (hot) so that i can be certain to be 10 overmax sidewall (45) in most cooler conditions. Ten over max sidewall was what MetroMPG test and found the max benefit. Been doing that for 3 years, 12000-15000 miles/year.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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04-12-2014, 06:32 PM
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#88 (permalink)
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Master Ecomadman
Join Date: Nov 2010
Location: Chicago area
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45 psi front 42 psi rear 205/70-R15
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- Tony
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08-02-2014, 06:27 AM
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#89 (permalink)
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EcoModding Lurker
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Location: Australia
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46-48PSI cold for the last 30,000K's, haven't seen any detrimental wear effects.
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08-02-2014, 09:56 AM
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#90 (permalink)
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Master EcoModder
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Fronts I run at 55 psi
Rears I run at 50 psi
The rack & pinion steering is really responsive, and I haven't seen any odd tread wear yet. I've been running this psi for 6 months.
I'm not gonna say the ride is all that comfortable, lol . . . I feel it if I run over a cigarette butt in the road, but it will coast half a mile!
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