Getting an accurate measure of tire pressure

Thread Tools
 
Search this Thread
 
Old 10-03-2003, 02:36 AM
  #1  
Pro
Thread Starter
 
dee diddy's Avatar
 
Join Date: Jun 2002
Location: Vancity 604
Posts: 712
Likes: 0
Received 0 Likes on 0 Posts
Getting an accurate measure of tire pressure

i've always used one of those pencil-type gauges but today i tried a couple others just for curiosity and i got totally different readings on each. the one i have is stainless steel while the others were cheap plastic ones. now i'm wondering if i should just discount the readings on the cheap gauges or are these type of gauges not reliable? would a round analog or digital gauge be more accurate?
Old 10-03-2003, 07:59 AM
  #2  
New Life
 
maxx96's Avatar
 
Join Date: Jun 2003
Location: Jacksonville, FL
Age: 57
Posts: 505
Likes: 0
Received 0 Likes on 0 Posts
I used to have the metal analog one but if you're not careful they go bad, if the little lubrication they have gets mixed up with dirt, it will give you an erroneus reading because the shaft is not sliding smooth within the tube.
I have now a digital one and what a difference, it works great, I recommend you get a digital one.
Old 10-03-2003, 08:29 AM
  #3  
 
Mr Zipps's Avatar
 
Join Date: Jul 2002
Age: 42
Posts: 1,874
Likes: 0
Received 0 Likes on 0 Posts
I picked one up at AutoZones. Its a circle looking one.. It works better than the pencil ones IMO...
Old 10-03-2003, 09:26 AM
  #4  
Senior Moderator
 
fsttyms1's Avatar
 
Join Date: Aug 2002
Location: Appleton WI
Age: 49
Posts: 81,383
Received 3,063 Likes on 2,119 Posts
the digital ones are real nice as are the ones Mr mentioned
Old 10-03-2003, 09:42 AM
  #5  
is the Mighty Favog
 
Tom Blasing's Avatar
 
Join Date: Feb 2003
Age: 64
Posts: 2,466
Likes: 0
Received 2 Likes on 2 Posts
I STRONGLY recommend one of these:

Moroso 710-89560 for $44.99. It's been the best investment I've ever made for any of my cars!

Go here: http://www.jegs.com/cgi-bin/ncommerc...98&prmenbr=361

Buying the cover too is a nice addition to keep it safe. from bumps on the ground.

It may be a little expensive but WELL worth it. My last set of tires (Goodyear RS-A) I had on my 94' Talon have almost 70k miles and are still going strong through the winter. And they're not dry rotted either.
Old 10-03-2003, 10:03 AM
  #6  
Burning Brakes
 
SK2003TypeS's Avatar
 
Join Date: Nov 2002
Location: LI, NY - Sector 7G
Posts: 1,242
Received 0 Likes on 0 Posts
Get yourself a good gauge. I checked my tires a couple of weeks ago and 2 were off by 1 or 2 lbs. Ride is a lot better now. I've been using this one for over 10 years.
http://store.summitracing.com/defaul...pressure+gauge

The one that Tom mentioned is even nicer cause of the hose extension. Hmm...may have to pic up one for the garage so I can leave the old one in my car.
Old 10-03-2003, 07:51 PM
  #7  
Blown is Best
 
Allout's Avatar
 
Join Date: Jun 2002
Location: Fresno, CA
Age: 63
Posts: 4,437
Received 15 Likes on 14 Posts
Originally posted by maxx96
I used to have the metal analog one but if you're not careful they go bad, if the little lubrication they have gets mixed up with dirt, it will give you an erroneus reading because the shaft is not sliding smooth within the tube.
I have now a digital one and what a difference, it works great, I recommend you get a digital one.
Just because it's digital, don't assume it's accurate. I just bought a digital from Sears for $15 because I wanted a second one for my other car. Right out of the package, it's about 12psi off and they claim 1psi accuracy.
Old 10-03-2003, 07:56 PM
  #8  
Banned
 
pianoman41's Avatar
 
Join Date: May 2001
Location: Western MA
Posts: 2,157
Likes: 0
Received 0 Likes on 0 Posts
The dial gauges historically are the most accurate. The pen gauges vary so you may want to spend a few extra $$$ to get a good one. Proper tire pressure is key to ride quality, handling and most importantly, tire wear.
Old 10-04-2003, 04:45 AM
  #9  
Racer
 
TLSAnthracite's Avatar
 
Join Date: Sep 2003
Location: SF, CA
Age: 40
Posts: 378
Likes: 0
Received 0 Likes on 0 Posts
how about when you set the pressure at the pump at the gas station and it rings when u reach it? are those accurate?? and how many lbs for a tls?
Old 10-06-2003, 07:59 PM
  #10  
is the Mighty Favog
 
Tom Blasing's Avatar
 
Join Date: Feb 2003
Age: 64
Posts: 2,466
Likes: 0
Received 2 Likes on 2 Posts
The manual says 32lbs. for both front and rear on this car. Some cars will have a front to rear staggered pressure.

If I get air at a gas station I overfill the tires by a few pounds at least. Your adding cold air to a tire that has hot air in it. So when the car sits long enough for ALL the air in the tires to cool down (when your supposed to check the pressure to get a correct/accurate reading) THEN you can let enough air out of each one to the proper poundage.

A good home air compressor is a wonderful investment. Campbell Hausfeld, Ingersoll Rand, Craftsman (though not my favorite because they use aluminum cylinders and heads) are just a few. I ordered the biggest one I could without having 240v installed in my garage. It’s a Campbell Hausfeld 26 gal. 5 hp horizontal with iron cylinders and head. It has two pistons and only requires the oil to be changed every year or so. Just remember to open the drain valve every few weeks to get rid of all the collected condensation.

You won’t believe the things you can do around the house with one of those. Air ratchets, impact wrenches, boating toys such as ski tubes, children’s inflatables, bike tires, drying off your engine after you wash it, pressure washers…the possibilities are endless.
Old 10-07-2003, 07:21 PM
  #11  
Pro
 
Black-n-Tan's Avatar
 
Join Date: Jan 2003
Location: Worcester MA/ R.I. (school)
Age: 40
Posts: 686
Likes: 0
Received 0 Likes on 0 Posts
i got a digital talking guage at radio shack for about 15 bucks. Do you think an inexspensive guage like this will be accurate?
it is certainly easier to use than the analog ones and i always check the same tire several times and the readings are uniform
Old 10-07-2003, 10:36 PM
  #12  
I shoot people
 
is300eater's Avatar
 
Join Date: Oct 2001
Location: Vancouver BC
Posts: 22,495
Received 3,055 Likes on 1,482 Posts
I bought one of those round kind... and I like them, but here's a warning... I dropped it on the ground, and it threw the reading off! Luckily, I sensed the wrong reading early, cause it just seem like it was too much air I was putting in, so I bought a new one, campared it... and figured it out before blowing all four tires.
Old 10-08-2003, 01:09 AM
  #13  
Burning Brakes
 
Vicman17's Avatar
 
Join Date: Jun 2003
Location: NNE of 716
Posts: 1,010
Likes: 0
Received 0 Likes on 0 Posts
I was using one of those pencil type gauges for years and never put any thought on accuracy, until I read an article on an old Consumer's Reports magazine about how tire gauges are made and calibrated. They recommended a brand called Accu-Tire and I picked one up from a local shop (Canadian Tire) for less than $15.00, It is digital and measures to 0.5 PSI.

Vicman

________________

03 TL Type-S SSM
K&N
Old 10-08-2003, 03:41 AM
  #14  
Pro
Thread Starter
 
dee diddy's Avatar
 
Join Date: Jun 2002
Location: Vancity 604
Posts: 712
Likes: 0
Received 0 Likes on 0 Posts
thx for the consumer reports tip. i was thinking about picking up one of those Accutire digital gauges at Canadian Tire. does yours have backlit?
Old 10-08-2003, 08:05 AM
  #15  
Burning Brakes
 
systek's Avatar
 
Join Date: Nov 2001
Location: tx
Posts: 973
Likes: 0
Received 0 Likes on 0 Posts
yep, ya'll need to keep track of stuff like this. it becomes more crucial when u start to drive a little faster than normal, especially in the twisties
Old 10-08-2003, 08:07 AM
  #16  
Burning Brakes
 
Vicman17's Avatar
 
Join Date: Jun 2003
Location: NNE of 716
Posts: 1,010
Likes: 0
Received 0 Likes on 0 Posts
I dunno if it's backlit (never used it in the dark), but it is angled and measures up to 99 PSI. The quality of their low-end ones and high-end ones (built-in light) seems to be the same.

Vicman

________________

03 TL Type-S SSM
K&N
Old 10-08-2003, 06:50 PM
  #17  
Three Wheelin'
 
tdoh's Avatar
 
Join Date: Jul 2001
Location: NorCal
Posts: 1,360
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by pianoman41
The dial gauges historically are the most accurate. The pen gauges vary so you may want to spend a few extra $$$ to get a good one. Proper tire pressure is key to ride quality, handling and most importantly, tire wear.
on the dial gauges...
Old 03-29-2007, 12:12 PM
  #18  
She thinks my TL's sexy.
 
farmdevil's Avatar
 
Join Date: Nov 2006
Posts: 187
Received 11 Likes on 10 Posts
I notice that the above links aren't still working. Upon some inspection, I found that the lower-cost Moroso gauges are only accurate to 2%. On our cars, that's 7/10 of a pound. I'd really like to find a gauge with 1% or better accuracy. I also think that many people on these forums are confused as to the definition of accuracy. The fact that a gauge measures down to, say, 0.5 doesn't mean that it is at all accurate. Unfortunately when I search the web, finding actual accuracy numbers for gauges is rare.

A friend of mine has a digital gauge (I'm not sure how accurate), but I have always found it to be extremely hard to get a good seal when using it. I think I want to go with either a dial type or a digital one.

Any recommendations on a gauge that has high accuracy and isn't a pain to use?
Old 03-29-2007, 03:41 PM
  #19  
Old&CnL
 
us000011's Avatar
 
Join Date: Dec 2004
Location: North Carolina
Age: 78
Posts: 282
Likes: 0
Received 0 Likes on 0 Posts
I have a digital "racing" gauge (roughly $35) that reads tenths of a pound; usually my Accutire analog is within a pound or two max. I alway double check one tire with both gauges before doing them all- it can be a pain.
I never trust only one gauge, since I have found my Cooper SLE's like 36 front and 34 rear. Any device can drift off calibration over time.
Old 03-29-2007, 05:24 PM
  #20  
Racer
 
vtec260's Avatar
 
Join Date: Nov 2006
Location: Alberta, Canada
Posts: 288
Received 18 Likes on 16 Posts
I have 3 gauges, 2 pencil types and one dial type, and all 3 reads differently on the same tire. I might invest in a digital type next time. I found the dial type difficult to get a good seal to get accurate reading.
Old 03-29-2007, 08:19 PM
  #21  
Team Owner
 
01tl4tl's Avatar
 
Join Date: Sep 2006
Age: 64
Posts: 33,535
Received 1,137 Likes on 1,067 Posts
My $10 autozone digital reads .5 lb increments, also reads bar and something else so everyone can figure it out.

You can go to a race car supply shop and buy a very accurate guage, but at the track we always deal with .5 lb adjustments so why bother.

If you really want to know the correct pressure for your tires get a laser pointed non contact thermal temp guage $50
Take a reading at the inner middle and outer edges of a hot tire fresh off the twisty roads or fast freeway run
(in a 1/2-1 inch measure from actual edge)
If one or more differ -then adjust the pressure or alignment as needed

Low tech and fine for most humans-
Read the tire for max cold pressure at what weight
Then figure how much weight you actually have on it- probably less
Take the max pressure and subtract 20 percent or 10 % X2 (for the non-mathologivcal inclindededed,) and use that as a base number
Stock size tires many run 36-38 front ( al ittle bumpy)
and rear 32-34
If tire says max cold 44 psi - you can roughly run 36
Old 03-29-2007, 10:07 PM
  #22  
is the Mighty Favog
 
Tom Blasing's Avatar
 
Join Date: Feb 2003
Age: 64
Posts: 2,466
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by farmdevil
Upon some inspection, I found that the lower-cost Moroso gauges are only accurate to 2%. On our cars, that's 7/10 of a pound. I'd really like to find a gauge with 1% or better accuracy. I also think that many people on these forums are confused as to the definition of accuracy. The fact that a gauge measures down to, say, 0.5 doesn't mean that it is at all accurate. Unfortunately when I search the web, finding actual accuracy numbers for gauges is rare.
I don't think 7/10's of a pound is too terrible. I mean you can easily get 3 lbs. difference between left and right tires depending on which side the sun is shining on.

"Accuracy" is also an opinion laced term. Some people may think their home stereo set up with 5% variance in it's capacitors is accurate. I personally don't think that happens till .5 or 1%. But that's just me....
Old 03-30-2007, 09:00 AM
  #23  
She thinks my TL's sexy.
 
farmdevil's Avatar
 
Join Date: Nov 2006
Posts: 187
Received 11 Likes on 10 Posts
Originally Posted by Tom Blasing
I don't think 7/10's of a pound is too terrible. I mean you can easily get 3 lbs. difference between left and right tires depending on which side the sun is shining on.
Another thing I forgot to mention is that I use nitrogen. I only gain a couple PSI after a half hour of 75MPH highway driving. I doubt that the sun will affect me by 3 pounds.

I drive a lot (25,000-30,000/year) and my gas mileage and tire wear are very important to me. I figure if I'm going to buy a gauge, I want it to actually be accurate to within 0.5 of a pound. I figure if it isn't accurate to that, then why even have a gauge that reads down to 0.5?
Old 03-30-2007, 10:10 AM
  #24  
is the Mighty Favog
 
Tom Blasing's Avatar
 
Join Date: Feb 2003
Age: 64
Posts: 2,466
Likes: 0
Received 2 Likes on 2 Posts
I see where your concern is...been there. In one of my earlier posts I said that I've gotten over 70k on a single set of Goodyear RS-A's; that was using that same Moroso guage. I did run them over the factory recomended pressures (about 5 lbs.) which made for a bumpier ride but, eh. But as you know you just have to check and adjust the pressure a lot.
Old 07-08-2009, 10:14 AM
  #25  
6th Gear
 
walterGT67's Avatar
 
Join Date: Jul 2009
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
I have the magnaflow too and love it, they are cheaper on ebay but I wanted a warranty(salt in winter kills an exhaust) so I got it here. magnaflow 15892, or you can try one of the vendors here, they are always running sales/specials. either way its a great system and very easy to install.
Old 07-08-2009, 12:59 PM
  #26  
Honda+Blue=My garage
 
pmptx's Avatar
 
Join Date: Dec 2003
Location: DFW TX
Posts: 2,564
Received 43 Likes on 32 Posts
Originally Posted by walterGT67
I have the magnaflow too and love it, they are cheaper on ebay but I wanted a warranty(salt in winter kills an exhaust) so I got it here. magnaflow 15892, or you can try one of the vendors here, they are always running sales/specials. either way its a great system and very easy to install.
Beside the 2 yo thread, they are talking tire pressure, not exhaust.
WTFBBQ
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
udelslayer
1G RDX Problems & Fixes
12
05-06-2016 12:27 PM
mugen_kid
Member Cars for Sale
7
11-13-2015 10:38 PM
NBP_BALLER
2G TL Performance Parts & Modifications
5
09-23-2015 08:18 PM
JarrettLauderdale
2G CL Dynograph Gallery
5
09-21-2015 07:51 PM
MyGuti
3G TL (2004-2008)
7
09-12-2015 06:52 PM



Quick Reply: Getting an accurate measure of tire pressure



All times are GMT -5. The time now is 09:11 PM.