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| Tire Pressure Gauges | Login/Join |
DRR S/Pro |
This morning I picked up a Merlin digital gauge from Harbor Freight, on sale for $12.99 for Inside Track Club members. Using the 0-100 Blue Point gauge I have been using for 30 years, my slick measured just a hair under 18, which is where I run them. The Merlin measured 15.9 psi. I thought for sure the Merlin was off, but a Harley dial gauge and pencil gauge were both around 15. I guess I’ve probably been running on the low side for several years, but always used the same gauge so was likely consistent. Tony Leonard | |||
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| DRR Pro |
That’s an Excellent deal on a variant model of the gauge that was tested and finished #2. One could dismiss the extreme hot and cold performance of these tests for normal use.  | |||
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DRR Top Comp |
That is true, I have seen quite a bit of difference in tire gauges and feel it is important to use same one all the time. Or in your case compare and correct to same. I find it funny when people say you must run XX tire pressure in your car. We have gauges that measure quite different, we have some cars that are heavier or hit tire harder and require more air pressure and we have different size tires and compounds. And you have cars that are very sensitive to tire pressure while others may be more forgiving. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Pro |
While I’ll agree with this, I believe chassis setup is more important than exact tire pressure for most. | |||
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| DRR Pro |
Buxton Engineering | |||
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DRR Sportsman |
Agree with all the above, but also I believe in reading the surface of your slicks after a run. There is a surface look that I call "happy". But track surface and prep can affect it quite a bit, and I think we all know that you sometimes may want to make pressure adjustments based on track conditions and weather, too. Dan "Jim" Moore Much too young to feel this damn old!! | |||
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DRR S/Pro |
https://www.buxtonengineering....e_pressure_gauge.php Had to check it out. Costs almost as much as I paid for my last pair of slicks. | |||
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DRR Pro |
"Contact patch" is the only thing that matters, and as little as 1/4 lb. of air pressure can result in a change of contact patch spring rate by 15-25 lbs. The tire is a spring too. How that effects your car setup is what you need to know. More specifically, for drag racing there's no need to go way down into that rabbit hole, but tire pressure can be used as a tool to research your overall suspension scheme. "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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DRR Sportsman |
I want a tire gauge that repeats over and over again. I have used a ton that do not repeat. And, the amount I am looking for (lets say 15 lbs is the sweet spot) has to be in the middle, so a gauge with no more than 30 lbs. Like everything in racing, tire pressure is just a number. Once you find the one that is the most consistent, stick with it. The actual number is only relevant to your car. I've used the same gauge for many years when driving a dragster. People would ask to borrow it but I would tell them no, it was useless on their car. One day a friend drove my car and I told him about the gauge and what pressure to run. Somehow, he left my gauge at the track. I bought a new one and had to start all over finding the sweet spot. 72 Nova "Hooptie" | |||
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| DRR Pro |
One of my friends races go carts. Those guys spend a ridiculous amount of money on tire prep. They all use high dollar pressure gauges. I have him test mine every once in awhile. The other week we tested a bunch of gauges and my longacre 0-15 PSI was 1/2 lb low. We have a couple gauges that are 2-3 lbs off. I mark them accordingly and use them for emergency spares. Surprisingly, the Harbor Freight digital gauge was dead nuts on.The only problem was it would be dead nuts 4 or 5 times then all of a sudden be a lb low. But it was the closest when it was right. | |||
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| DRR S/Pro |
If you drop your gage you better test it against a known good one! Bit me once! California Screaming! Raceless in California! | |||
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| DRR S/Pro |
Last week after reading the test results posted by the OP, I "Broke the bank" and bought a $10 Etenwolf digital gauge. What a surprise! The ease of use, the accurate readings and the simplicity of the gauge really surprised me, so I'm replacing my $70 tire gauge with the "High Dollar" Etenwolf. Bob | |||
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| DRR S/Pro |
I needed one for setting dually pressure. Thanks! California Screaming! Raceless in California! | |||
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| DRR Pro |
The ETENWOLF and JACO gauges arrived today and here’s the results of my test. Be aware the Silme digital gauge only reads in 0.5 lbs increments. Measuring rear slicks. Longacre Analog (9.3), JACO (9.4 ), ETENWOLF ( 9.4 ), Slime (9.5 ), 20psi Pencil ( 9.0 ). Measuring front drag tires. JACO ( 35.0 ), ETENWOLF ( 35.1 ), Slime ( 35), Milton 50psi Pencil (35). Measuring trailer tires. JACO ( 65.9 ), ETENWOLF (65.6 ), Slime ( 65.5 ). The digital displays on both ETENWOLF and JACO were easy to read especially in the dark. The ETENWOLF has a nice light feature and sized to fit in your hand perfectly. The JACO has a pressure relief for adjusting setting. Both have battery indicators. This JACO is replacing the Longacre Analog that has a sticky needle. Now I have one gauge that can check both front and rear tires and is lighted display for night racing. The hose is slightly shorter on the JACO but wasn’t a problem to use as both head and chuck swivel.  | |||
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| DRR Sportsman |
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| DRR S/Pro |
An update on my Harbor Freight Merlin gauge - I used the bleed button to let some air out of a tire and the bleeder won’t seal back up. I’ll need to take it back and try another one. I tried taking it apart myself, but a real thin wrench would be needed. Tony Leonard | |||
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| DRR Pro |
excellent gauge.I use it every day in my shop | |||
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| DRR S/Pro |
I had no such problem with the bleed valve so there is hope in your future! Illegitimi non carborundum | |||
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| DRR S/Pro |
I can happily report that I exchanged my Merlin gauge, and not only does the bleeder valve not leak on the new one, it actually lets out a proper stream of air. The other which was very weak. Definitely was a defective bleeder valve all around. Tony Leonard | |||
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DRR Top Comp |
I have had all sorts of gauges over yeas. I always have two on hand. One for main use other for backup. Trick is to know what they both read at same time. I take main guage which is usually old spare. set tire to pressure then read with other and make note. If one is hurt or not working I know what other needs to read for same pressure. I also do compare reading on regular basis. After all consistent tire pressure is goal and not the number on gauge. When I die someone is going to find this pile of notes from racing and ask why the hell did he keep all this useless crap?LOLThis message has been edited. Last edited by: wideopen231, America home of free. Brought to you by 2nd amendment. | |||
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