Tire guage differences, one to another ?
10-04-2002, 10:31 PM
#1
Three Wheelin'
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Tire guage differences, one to another ?
Fellow track hounds, anyone, please comment.
I have a ??? wrt to which of three tire guages to believe. Here is the story:
Yesterday as I finished an undercarriage / brakes event prep and went to set tire pressures. Having a new helper tagging along to the next event, I thought it good time to do a show and tell on setting tire pressures. In the end, only a good contraversy emerged surrounding three fairly high end tire guages.
A year or so ago, I thought to "uggrade" my Snap On tire filler / guage to an even better liquid filled, ".25" psi accurate 0 - 60 psi lab guage (It is not an absolute range guage, for those thinking this already). The unit came from Mc Master Carr industrial supply and is "Piko" brand, I think european, not that makes it beter or not...
Anyway, my new assistant thought he would compare his new electronic digital number to the liquid filled unit and we found the two guages 8 psi off. As a note, I do wait for the liquid filled guage to make its way through the liquid.
For a tie breaker, we got my track kit guage, a Moroso branded unit, and it was 6 psi higher than the Piko high end guage and 2 psi lower than the digital. Here is the question.
Anyone got a bright idea how to calibrate this mess ? I would have given it to the Piko, hands down as it is obviously the highest end guage and "lab" grade.
Most of my baselines have been set by the Piko, but I am now thinking I could possibly lower my tire inflations a few more psi's without rim edge worries by trusting the other two. I have been using a suggested lower boundary from various folks suggesting a bottom end limit of 30F / 32 R.
Thoughts appreciated !
Jim Morton
'95 C2
<img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />
I have a ??? wrt to which of three tire guages to believe. Here is the story:
Yesterday as I finished an undercarriage / brakes event prep and went to set tire pressures. Having a new helper tagging along to the next event, I thought it good time to do a show and tell on setting tire pressures. In the end, only a good contraversy emerged surrounding three fairly high end tire guages.
A year or so ago, I thought to "uggrade" my Snap On tire filler / guage to an even better liquid filled, ".25" psi accurate 0 - 60 psi lab guage (It is not an absolute range guage, for those thinking this already). The unit came from Mc Master Carr industrial supply and is "Piko" brand, I think european, not that makes it beter or not...
Anyway, my new assistant thought he would compare his new electronic digital number to the liquid filled unit and we found the two guages 8 psi off. As a note, I do wait for the liquid filled guage to make its way through the liquid.
For a tie breaker, we got my track kit guage, a Moroso branded unit, and it was 6 psi higher than the Piko high end guage and 2 psi lower than the digital. Here is the question.
Anyone got a bright idea how to calibrate this mess ? I would have given it to the Piko, hands down as it is obviously the highest end guage and "lab" grade.
Most of my baselines have been set by the Piko, but I am now thinking I could possibly lower my tire inflations a few more psi's without rim edge worries by trusting the other two. I have been using a suggested lower boundary from various folks suggesting a bottom end limit of 30F / 32 R.
Thoughts appreciated !
Jim Morton
'95 C2
<img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />
10-05-2002, 12:35 AM
#2
Passed On
Rennlist Member
Rennlist Member
Buy some good ones is all I can suggest. I've got two analog dial-type "Accugage" units (one in each car) with a bleeder hose/valve integral to them; they compare quite well to each other (within 2 psi).
Digitals are noticeable less accurate and more easily knocked out of calibration than analogs, far as I know.
Digitals are noticeable less accurate and more easily knocked out of calibration than analogs, far as I know.
