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04-24-2011, 01:36 AM | #19 |
Drives: 2008 Yaris HB Join Date: May 2009
Location: So Cal.
Posts: 100
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I have tried 40-50 psi in stock and aftermarket V rated tires. Grip and mileage were slighty better (1-2 mpg) but I am down to 36 psi now, the car just rode too godamn hard. Joints in the interstate were torture, and road noise was up too. I just made a 800 mile round trip at an average of 70 mpg at 37 mpg overall. Thats good enough for me, I think I'm ready for new shocks at 75K miles now, I'm tired of being beaten to death.
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04-24-2011, 02:45 AM | #20 |
Joey
Drives: '14 Scion xD 5-speed Join Date: Oct 2008
Location: El Monte, Ca
Posts: 3,529
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40 all the time to get the best balance between grip and MPG
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Formerly owned Met-Met. '07 Yaris LB 5-speed. A forum post should be like a skirt: Long enough to cover the subject but short enough to keep things interesting. "I don't have an anger problem. I have an idiot problem." -Hank Hill |
04-24-2011, 03:18 AM | #21 |
Drives: 2008 Yaris HB Join Date: May 2009
Location: So Cal.
Posts: 100
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Yeah I think once I get new shocks that will be the best compromise.
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04-24-2011, 03:40 AM | #22 |
Drives: Yaris Sedan 5MT Join Date: Oct 2008
Location: SoCal
Posts: 865
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That article, what speed were they going?
I'm at a set 60psi. Have had it there for two sets of tires since 10k and am now at 65k miles. Tires are/were stockies.
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04-24-2011, 07:29 PM | #23 |
Drives: 2008 toyota yaris Join Date: Mar 2011
Location: OHIO
Posts: 55
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Man, I can't believe you guys are blowing out tires that high of psi.
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08 toyota yaris with some big tires lol 02 chevy duramax that runs 11.63 at 116 mph in the 1/4 mile |
04-25-2011, 12:09 AM | #24 |
Crazy Oil Sniffer
Drives: MM 09 Yaris 5 Dr LB "Click" Join Date: May 2009
Location: ME
Posts: 498
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Mazilla,
That article is based on ONE trip at 70 mph using cruise control! Oh yeah, and they were only running 45 psi. Hardly scientific. Apparently, no one was killed, however. I've been running these pressures for nearly 2 years straight. I know many others have been as well. I know of none who have had any issues outside of a stiffer ride. ALL have gotten uncommonly good tire wear. I can guarantee you this car handles and brakes better at 60 psi. What exactly are you using as evidence (hopefully some real science here?) to conclude I am a suicidal (and let us not forget potentially homocidal) maniac (Maine-iac?). If I had found one solitary piece of REAL info that indicated my practice was unsafe I wouldn't even have tried it. Didn't find any. Others who had been running higher pressures for years reported only positives. (Excluding those who died fiery deaths, of course.) I guess what I'm saying is, at least up to this point, my anecdotal evidence trumps your anecdotal evidence because I know me better than I know you. R2 |
04-25-2011, 02:18 AM | #25 | |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Quote:
In a game of Russian roulette I still have 5 chances not to get shot...doesn't make me smart for playing. If you can find me one piece of info that says it is safe, we can go from there...because I can fill this page with links to places that say it's STUPID. To reiterate, as far as I'm concerned you can drive your car off a cliff, as long as the only person hurt is you. These stupid games risk the lives of every car you might some day collide with, maybe it wont be today or tomorrow, maybe it will be 20 sets of tires down the road...but the negative effects are there and you cannot escape that.People that play these games are the reason we have so many laws on the books...because you can't tell the difference between a good idea and a bad one. |
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04-25-2011, 04:02 AM | #26 |
Drives: Yaris Sedan 5MT Join Date: Oct 2008
Location: SoCal
Posts: 865
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Very well, give us some data on accidents related to tire over inflation. I know there are some out there with under inflation.
Enlighten us poor fools for which the gub-ment are protecting hour sefs frum us-sulfs.
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04-25-2011, 05:35 AM | #27 | ||
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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Quote:
You're fighting physics and common sense, neither battle will end in victory. Quote:
Mine in bold Somebody had to input common sense into this thread, so random people searching the net don't see this thread and thinks it's a good idea to copy you folks. Last edited by mazilla; 04-25-2011 at 06:31 AM. |
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04-25-2011, 05:53 AM | #28 |
Drives: 2007 Ghetto VITZ Join Date: Aug 2007
Location: 808
Posts: 25
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on my 215/40 r17 its 37psi 36 is the max written on sidewall of my tires
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04-25-2011, 06:49 AM | #29 | |
Drives: Yaris Sedan 5MT Join Date: Oct 2008
Location: SoCal
Posts: 865
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Quote:
These studies were after the fact, thats why they couldn't directly relate to tire pressure. "Either low or high pressure" is a wide spectrum. I respect that you have experience in the subject, but R2, others, and I haven't exactly blindly upped our pressures. Not speaking for the others but I've read the various forums... I haven't read about any incidents related to overinflation. People have done this for at least 5 years now, of that population of people doing this, I have not heard of any incidences. It's not to say that it proves my stance, it's saying that without direct info/studies, that is what I have to go on. I do understand basic physics, you're saying something will give. Of course something will give, but the picture most people think of in their mind about tires popping is like that of a overblown balloon. It's not going to pop like a balloon. I've had a few punctures...at the high psi (granted at low or no speed), they don't "pop", otherwise I would have been scared shitless. What a majority of us (those who do over inflate) are saying is that there is a higher limit than what's on the sidewall. Then there are the many differences on the max psi for different tires. Manufacturers have come out with 50psi max tires in their "fuel economy" tires. Those manufactureres haven't exactly explained what is so different, or what they did to "provide safety" at the higher psi. Someone please scientifically test this out for us!?! We are not unreasonable, we will take data. Edit: There is a lot more damage out beyond YW for the brainless copy cats. For the most part if someone asks me, I tell them to do the max on the sidewall and only as high as they're comfortable with, and I'll find out later that they stopped at 5 under the max. Why do I do that? The folks who usually ask this question just want confirmation for what they already know and don't really want to be scared. Now if someone gave me a hint that they knew some basics about hypermiling, I would steer the conversation a different direction.
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Last edited by rningonfumes; 04-25-2011 at 07:45 AM. Reason: Added second to last paragraph and addressed your comment. |
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04-26-2011, 03:33 AM | #30 | |
Crazy Oil Sniffer
Drives: MM 09 Yaris 5 Dr LB "Click" Join Date: May 2009
Location: ME
Posts: 498
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Quote:
Any test data from "tire school"? Can you share data you've collected working at a tire shop related to tire inflation that apparently is not even collectible by NHTSA? Anything? "Given tire size xyz for every psi over max sidewall a tire is 1 point Blah blah more likely to fail" or "takes an additional x ft of stopping distance" or anything such? If our practices are so blatantly "stupid" surely there is plenty of such data available that I have overlooked somehow. Thanks for the compassion. The urge to drive off a cliff has never presented itself until this thread came along. Good thing, I may have injured an innocent ant or maggot. Keep in mind I very concisely answered the OP's question. I provided a fact, plain and simple. I wasn't advocating the practice, nor do I recommend the practice. I hope my 1st issue is 20 sets of tires down the road! I bet any user of tires would take those odds, period! Doesn't seem to add credence to the fact my habits are so dangerous. |
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04-26-2011, 03:45 AM | #31 |
Crazy Oil Sniffer
Drives: MM 09 Yaris 5 Dr LB "Click" Join Date: May 2009
Location: ME
Posts: 498
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Almost forgot-to the OP I run 120 psi in my road bike tires.
R2 |
04-26-2011, 11:26 AM | #32 |
advocatus diaboli
Drives: 07 Yaris hatch Join Date: Mar 2011
Location: San Jacinto California
Posts: 1,126
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R2...when something happens you make sure you have the intestinal fortitude to tell te investigators(if you still have the ability) that you run your tire pressure far beyond the Mfg safety guidlines, then maybe we can start to get some real data. I have the feeling people tend not to mention that they are the cause of the problem after an accident, hence no data, nobody like going to prison or being sued. Make sure you reference this thread, let them know you were warned and take full responsibility for your actions.
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-Type 07 FFL- My odometer 03/11 http://i205.photobucket.com/albums/b...a/2843ed85.jpg |
04-28-2011, 01:06 AM | #33 |
Drives: 2008 Yaris Sedan Join Date: Oct 2008
Location: Houston
Posts: 22
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04-28-2011, 09:02 AM | #34 |
Drives: Black XA not yaris but close Join Date: Jun 2009
Location: DFW
Posts: 48
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Can you just get some smaller Light truck tires? I run 35psi in my XA but I run 65 psi in my 68 vw bus, they require it or they get all bendy.
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04-28-2011, 11:52 AM | #35 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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i just upped mine to 52 cold
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-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
05-01-2011, 11:39 AM | #36 |
Drives: '09 Yaris Sedan Join Date: Oct 2009
Location: Western N.Y.
Posts: 75
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tires and pressures
Been reading this. Race cars actually run the pressure that will maximize grip. Rarely is fuel economy an issue. Last I read, Formula 1 cars go to the grid with less than 20 psi. The tire is a vital component of the suspension. Usually a pyrometer is used and the shocks, springs, and alignment to get the maximum use from the entire tread. I have never had to exceed rated sidewall for autocrossing. race or street tires.
I run 42 front and 35 rear. Any higher in the back and the ABS is kinking in all the time. Tire wear appears reasonable and the car feels more planted than at the factory recommendations. As for the super presuures, the design of the tire really makes these unsafe. It just is bad all around the run the big numbers. Suspension takes a bigger beating, breaking distances usually increase. I know I'll never do it. doc |
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