T&T Racing

Why do you think digital is more accurate or repeatable than analog. In either option, the pressure gauge should be calibrated yearly or every 2 years. The pressure gauge is taken to a standards laboratory for calibration. For an analog gauge, my cost was $50. Digital cost would be higher and between calibrations, you have to know when to replace the battery. IMO, analog is the way to go.

Igooz

T&T, I will not argue abour analog vs. digital. I agree about calibration.
And I did buy the 360094 digital and will keep up with calibration.
I also have a French made Schrader fill with analogue gauge that has been super accurate, but it is a 150psi gauge and kind of hard to see +/-1 psi

gbuff

This thread is old, yes, but timely....I've been using old-school VDO (now MotoMeter Germany) dial gauges for years and the one I was using finally gave it up after I dropped it (again) after checking my pressures....

So I pulled out the spare (originally bought two just for this occurrence), checked the pressures again and the new gauge read 1 lb higher than the old. Ambient temps had no bearing as I used both within a few minutes.

Ordered and received a new backup gauge, checked pressures and this new third gauge read 2 lb higher than the second one (and 3 lb higher than the first)--ambients were within a few degrees. Car was in the garage the entire time.

Moral--3 of the exact same gauges can read differently

Gary

Matt Romanowski

If you read the accuracy specs on the gauges, you'll see that your normal digital gauge has a tighter tolerance than nearly any analog gauge. The only analog guages that get close are test spec gauges. For instance, Longacre 53007 digital is .1lb / .1%, 52002 liquid filled is 2% (.6 lbs on a 30 psi measurement), and their "Pro Precision" analog is .25 lb to .5%.

If you walk through a pit at any pro race, you will see Intercomp digital scales in the majority. Their are a few Longacre and some Ashcroft.

LuigiVampa

Really old thread? You mean way back in 2015?

Staying on topic in the intervening eons I have purchased a nitrogen tank for my trailer. Its actually more convenient as I don't always run my generator which is needed for the compressor, which I still have mounted in the trailer as well.

Since I started instructing now I make sure that I talk about tire pressures with all the new drivers and the importance of checking every time you come off track.

NYoutftr

Being a NY Giants fan, that is funny

Dr911

Matt, good info.
Interested to hear what battles you use and how often you change them? Do you keep a stash of spares?

Matt Romanowski

I use a quality lithium. 9v. I keep 1 spare. They last a long time.