Tire Pressure Sensor Accuracy?
Thread Starter
Drifting
Joined: May 2005
Posts: 1,476
Likes: 0
From: San Diego CA
Tire Pressure Sensor Accuracy?
So I go in for fuel today and put some air in my tires. The car said I had 28 in the front and 29 in the rear, so I put the air gun on them (which says they are already at 30, but I know they arent known for accuracy) and put them up to 31 or 32 according to the gun. My sensors still say 28 in the front and 1 of the rears says 29 and one says 30. I pulled out one of those pen style pressure testers and it says i have 30-31 in each wheel.
Are these things inaccurate?
Are these things inaccurate?
Racer
Joined: Apr 2005
Posts: 403
Likes: 0
From: Lake Havasu, Arizona
I can tell you that I tested mine with a calibrated gauge (NIST traceable) when i first go the car and it was right on to the nearest 1 PSI. After that I have checked a couple of time and the DIC was still right on.
Racer
Joined: Feb 2005
Posts: 455
Likes: 0
From: Mineral Virginia
Mine is always spot on with a calibrated gauge when cold, will vary by up to 2psi when really warmed up. Don't know why the heated temp would be off so much (it is always higher than the gauge reading using two different calibrated gauges) but I only really care when cold.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by C6Harley
So I go in for fuel today and put some air in my tires. The car said I had 28 in the front and 29 in the rear, so I put the air gun on them (which says they are already at 30, but I know they arent known for accuracy) and put them up to 31 or 32 according to the gun. My sensors still say 28 in the front and 1 of the rears says 29 and one says 30. I pulled out one of those pen style pressure testers and it says i have 30-31 in each wheel.
Are these things inaccurate?
Are these things inaccurate?
Team Owner
Joined: Dec 2002
Posts: 32,074
Likes: 296
From: San Francisco CA
I use a Accugauge round dial type with air release valve
I find a two pound difference between the DIC and my Accutire guage. The DIC is 2 lbs. lower than what the Guage indicates so if the guage is 32 then on the DIC will be 30. I go by the guage PSI. 
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Instructor
Joined: Aug 2005
Posts: 179
Likes: 0
From: Sacramento CA
need help with wheel sensors
Hey all
Newbie here, if I get after market wheels for my 1998 coupe, will the wheel sensors work on the new after market wheels since they just screw on the valve stems. Please help.
Newbie here, if I get after market wheels for my 1998 coupe, will the wheel sensors work on the new after market wheels since they just screw on the valve stems. Please help.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by motorpsycho98vette
Hey all
Newbie here, if I get after market wheels for my 1998 coupe, will the wheel sensors work on the new after market wheels since they just screw on the valve stems. Please help.
Newbie here, if I get after market wheels for my 1998 coupe, will the wheel sensors work on the new after market wheels since they just screw on the valve stems. Please help.
Drifting
Joined: Jun 2005
Posts: 1,837
Likes: 4
Originally Posted by quincy
I had very close accuracy at sea level but the sensor was low by 3# when measuered at 6000ft altitude. I tried several hand gauges but the sensor always read lower them the hand gauges.
The actual barometric formula used to calculate pressure drop is more complex, but this is close enough for any altitude that you're likely to be driving at.
Instructor
Joined: Aug 2005
Posts: 179
Likes: 0
From: Sacramento CA
I talked to the after market rim place and they said the sensor should fit fine, they said they just screw on to the new rims valve stems because they are replicas of the real rims. Any feedback?
Drifting
Joined: Jun 2001
Posts: 1,270
Likes: 0
From: Prescott AZ
Originally Posted by masihman
Mine are always spot on. I use an analog dial tire gauge to check.
Drifting
Joined: May 2005
Posts: 1,659
Likes: 0
From: Las Vegas Location: Earth
Originally Posted by LS WON
I find a two pound difference between the DIC and my Accutire guage. The DIC is 2 lbs. lower than what the Guage indicates so if the guage is 32 then on the DIC will be 30. I go by the guage PSI.
I have the same Gauge and get the same results. DIC is -2lbs.
Racer
Joined: Oct 2002
Posts: 449
Likes: 2
From: Fayetteville, PA
Can't use mine
I have a 1997 and I just purchased chrome 06 style rims at Carlisle. I went to get them installed todat....not! 
The rib on the tire blocks the are from entering the tire.
Question can I use the belt tupe of sensor?
The rib on the tire blocks the are from entering the tire. Question can I use the belt tupe of sensor?
