How picky are you?

Messages
1,910
Location
Vista, CA
I was checking tire pressures and for some reason it kept poping up to 38.5 when I wanted 38 and I kept after it until I got what I wanted. Is anyone else out there picky, too? And what's your pick.
 
Messages
1,251
Location
Austin, TX
I use an analog gauge with a bleed valve. I over inflate it by a few PSI and use the bleed valve to drop it perfectly to 35 PSI. [Wink] Also I let the car sit for a while after inflation, compressed air is warm and I let it settle before adjusting the pressure.
 
Messages
661
Location
Bosphoria
I take the whell off and lay it flat at the sea level before calibrating. [Razz] seriously, I can't feel less than 2psi of difference at the steering wheel, but if I'm going to do it, I do it right.
 
Messages
1,983
Location
New Brunswick
I usually put mine to about 32-33, with all 4 tires within 1.5 pounds of each other. I still shudder when I think of the time I had a faulty pressure gauge that read approx. 35 pounds when the tire actually had 75-80 pounds! [Eek!]
 
Messages
1,508
Location
Colorado
Jonny Z: "Also I let the car sit for a while after inflation, compressed air is warm and I let it settle before adjusting the pressure." Air that has gone from a compressor into your tires should be cold, not warm. My question on tire pressure is more about gauge accuracy. I read an article years ago that stated the pencil-type guages are actually the most accurate. Dial type gauges can be notoriously inaccurate, even expensive ones. And then there are the newer digital type. I've noticed that none of these types of gauges ever specifies a level of accuracy, or an error percentage, on the packaging or instructions. They always say "reads in 0.5psi increments," or something to that effect. If you're gauge isn't very accurate then getting exacly the reading you want is meaningless. - Glenn
 
Messages
15
Location
Ft Walton Beach, FL
Glennc
quote:
I've noticed that none of these types of gauges ever specifies a level of accuracy, or an error percentage, on the packaging or instructions. They always say "reads in 0.5psi increments," or something to that effect.
As an electrical engineer, I find the complete lack of spec for accuracy and error of these gauges frustrating. So that leads to the question: If there is NO specifications, HOW do we know that pencil or dials type are better? And digital is not necessarily more accurate, it's just easier to read. It is possible, using the same gauge each time, the pressure variation from tire to tire would be small.
 
Messages
1,401
Location
Sarasota, Florida
I have several pencil gauges, one for each car and then some. They all read around the same pressure. I tossed one that was different by 3 or 4 lbs. from the others. The actual pressure is less important than the difference in pressure between tires, especially side to side. As long as the results form a single gauge are repeatable do not worry too much. As with Rick I always look for the gauge specs but they never have any and this disturbs me too. Look for a pencil type with a 50 or 60 lb. scale. The ones that go higher are harder to get accurate for lower pressures. aehaas
 
Messages
716
Location
San Gabriel Valley
38f/36r is ideal in the B5, but now even in "balmy" SoCal winter, the tires barely heats up...so it pretty stays even psi wise. On the rwd 190E, I put 40psi all around with good grip/handling and wear. Suspension with that Benz circa is unforgiving on tires. p.s. Aren't we all picky(on motor oil..), that's why we joined Bitog, Yes? [Big Grin]
 
Messages
1,251
Location
Austin, TX
quote:
Air that has gone from a compressor into your tires should be cold, not warm.
True for a tank type compressor, after the tank had a chance to cool. When you release compressed air, it actually gets cold. I have a 12V mini compressor, the hose actually gets warm as I pump. I pump it to 40 PSI, sleep on it, and bleed it down to 35 PSI the next morning in the garage.
 
Messages
22,188
Location
Colorado Springs
I go 30 cold all the way around, just like the door placard says to. 32 all around with my pops Blazer, just like the placard says. Anything more and it's a harsh ride over the minefields they call roads around here.
 

Mud

Messages
701
Location
Texas
I always wear a tin foil hat to reduce the possibility of any stray radio waves affecting the calibration of my $2.99 air pressure gauge. 34 psi.
 
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