+ Reply to Thread
Results 1 to 12 of 12
Like Tree2Likes
  • 1 Post By emilio700
  • 1 Post By Red_5

Thread: Need a reliable tire pressure gauge

  1. #1
    AROSC Comp. Director Slaysman's Avatar
    Join Date
    Sep 2008
    Location
    Manhattan Beach, CA
    Posts
    301
    Liked
    226 times

    Default Need a reliable tire pressure gauge

    I have been through a number of tire pressure gauges over the years. I carry two to the track because it seems like my primary one always loses its calibration, so I check them against each other periodically.

    Just checked them this past weekend, and they differ by 5 psi. My buddy's gauge read right in the middle of my two. We wandered over to the Buttonwillow tire shop, and their gauge matched my friend's exactly.

    So, who has been able to find a reliable gauge that will last? I get a little pissed that I finally settle on decent tire pressures for my car, and then the gauge starts shift. I have even tried the liquid damped ones. Is it just a fact of life that they all go bad? How can that be? Are the digital ones better in the long run?
    Terry Watson
    AROSC Competition Director

  2. #2
    http://www.trackhq.com/Banners/yellowsitesponsor.gif
    Join Date
    Oct 2012
    Posts
    524
    Liked
    345 times

    Default

    The unit below is the only one I've found so far that has been calibrated correctly and maintains the calibration. Expensive for sure but it has lasted 3 years. More than I can say for the analog gauges I now have lining my tool box. I have several analog tire gauges and they all disagree with each other, sometimes by as much as 5 psi . I've checked thus digital gauge against another identical gauge and they both agreed with each other. I have also had it tested on a NIST certified calibration rig twice and it was spot on. It also has a pyrometer function which is nice. The temperature compensation stuff I pretty much ignore.

    Longacre Temp Compensated Tire Gauge 53007

    i am usually not a fan of Intercomp products but this one is pretty good.
    AiM Data and Video systems, Suspension Setup, Race car builds, support, and rentals. At your beck and call.

    Mark Nichols
    Iron Canyon Motorsports
    http://www.ironcanyonmotorsports.com

  3. #3
    BMW Master bawareca's Avatar
    Join Date
    Jan 2011
    Location
    LA
    Posts
    1,712
    Liked
    641 times

    Default

    I use simple Longacre digital gauge for 3-4 years and didnt find it showing incorrect readings. Good digital gauges read the atmospheric pressure at start-up and stay accurate at any attitude.

  4. #4
    http://www.trackhq.com/Banners/yellowsitesponsor.gif
    Join Date
    Oct 2012
    Posts
    524
    Liked
    345 times

    Default

    I have 2 Intercomp and 2 Longacre analog gauges. All disagree. When tested the worst one was low by 4.2 lbs. None of this matters if you tune using your own data and your own gauge. When you share data with others or work on customer cars then the accuracy of the gauge starts to matter. It would be nice if the analog gauges could be calibrated by the end user but AFAIK this is not possible.

    Quote Originally Posted by bawareca View Post
    I use simple Longacre digital gauge for 3-4 years and didnt find it showing incorrect readings. Good digital gauges read the atmospheric pressure at start-up and stay accurate at any attitude.
    AiM Data and Video systems, Suspension Setup, Race car builds, support, and rentals. At your beck and call.

    Mark Nichols
    Iron Canyon Motorsports
    http://www.ironcanyonmotorsports.com

  5. #5
    Administrator ucfbrett's Avatar
    Join Date
    Jan 2009
    Location
    Ventura, Calif.
    Posts
    5,449
    Liked
    2243 times

    Default

    Good thread. I've gone through a bunch of them.

    I've been using a Longacre analog for a couple of years now, after having gone through three or four gauges. I like it. Be sure to get one that lets you release air from the tire with a thumb button and still give you a reading. I had a digital that had the thumb button, but I had to reset the gauge to get the new reading after releasing the air.

    I think this is the newer version:

    Longacre Deluxe Tire Pressure Gauge 52003

    img_5121.jpg

  6. #6
    AROSC Comp. Director Slaysman's Avatar
    Join Date
    Sep 2008
    Location
    Manhattan Beach, CA
    Posts
    301
    Liked
    226 times

    Default

    Quote Originally Posted by markn View Post
    I have 2 Intercomp and 2 Longacre analog gauges. All disagree. When tested the worst one was low by 4.2 lbs. None of this matters if you tune using your own data and your own gauge.
    My experience has been that the discrepancies from one gauge to another will change with time, so it does become a concern. How do you tell which one has shifted? Best 2 out of 3?

    One gauge apparently shifted due to the needle continually hitting the stop when pressure was released. Not such a good design.

    Do the digital gauges read more consistently and repeatably because there are no (or fewer) moving parts?
    Terry Watson
    AROSC Competition Director

  7. #7
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
    Join Date
    Aug 2007
    Location
    SoCal
    Posts
    3,629
    Liked
    2400 times

    Default

    Tire pressure gauges are sensitive to shock. Don't drop it or bang it into anything, ever. If it gets dropped or banged, check it against a reference before returning it to service.
    We have two in our shop. A $35 Longacre without a case that gets handed roughly and a $65 Longacre that is handled like a Faberge egg and is always stored in its case. They consistently read within .5psi of each other.
    bawareca likes this.
    WWW.949RACING.COM
    SuperMiata

    Aside from their cost I never understood why people race them.
    But obviously I just dont get it. -fatbillybob

  8. #8
    http://www.trackhq.com/Banners/yellowsitesponsor.gif
    Join Date
    Oct 2012
    Posts
    524
    Liked
    345 times

    Default

    I try to take advantage of the tester carried around on the BF Goodrich support truck and check gauges whenever I see them at the track. Usually averages out to about once per year. The digital gauge has been tested at least twice now and is holding its calibration in spite of not so nice treatment by me. I don't know that I'd spring for one with the pyrometer again but I'd certainly buy the digital gauge over the analog version based on my experience so far.

    Quote Originally Posted by Slaysman View Post
    My experience has been that the discrepancies from one gauge to another will change with time, so it does become a concern. How do you tell which one has shifted? Best 2 out of 3?

    One gauge apparently shifted due to the needle continually hitting the stop when pressure was released. Not such a good design.

    Do the digital gauges read more consistently and repeatably because there are no (or fewer) moving parts?
    AiM Data and Video systems, Suspension Setup, Race car builds, support, and rentals. At your beck and call.

    Mark Nichols
    Iron Canyon Motorsports
    http://www.ironcanyonmotorsports.com

  9. #9
    The Real Captain Slow Red_5's Avatar
    Join Date
    Dec 2008
    Location
    Santa Barbara
    Posts
    4,188
    Liked
    704 times

    Default

    You guys are making me nervous. I've had my Snap-on digital gauge for over 6 years, never thought it might be no longer accurate. I guess I have another excuse for being slow . . .
    bawareca likes this.
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

  10. #10
    Senior Member
    Join Date
    Jul 2014
    Location
    Gainesville, GA
    Posts
    126
    Liked
    20 times

    Default

    I've always wondered how accurate mine was, but figured as long as its repeatable (which it is) I should be OK...until the day I forget it and have to borrow someone else's. And on a slightly different note, the guage orientation seems upside down to me, I wish there was an option to have it flipped. For some reason I don't like turning the guage 180 degrees when checking pressures. Does this bother anyone else?
    '99 miata

  11. #11
    AROSC Comp. Director Slaysman's Avatar
    Join Date
    Sep 2008
    Location
    Manhattan Beach, CA
    Posts
    301
    Liked
    226 times

    Default

    Quote Originally Posted by eyeballs View Post
    I've always wondered how accurate mine was, but figured as long as its repeatable (which it is) I should be OK...
    How do you know it is repeatable unless you check it against a reference?
    Terry Watson
    AROSC Competition Director

  12. #12
    Senior Member
    Join Date
    Jul 2014
    Location
    Gainesville, GA
    Posts
    126
    Liked
    20 times

    Default

    Quote Originally Posted by Slaysman View Post
    How do you know it is repeatable unless you check it against a reference?
    Very good question. While I haven't checked against a known accurate or known repeatable reference... I use it to check my daily drivers as well as at the track, so its been checked against my electric compressor, bike pump (not a cheapie) and I've checked after having a shop mount/balance tires. Sure, in the beginning I had no idea but after using it 20+ times its easy to have an "idea" of its accuracy. I'd trust it to +/- 1 psi or so. Not definitive proof by any means, but for a relatively inexpensive guage (basic longacre) it's good enough for me.
    '99 miata

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts