General Rule Of Thumb When Filling Tire W/ Air?

hl0m4n · 12-15-2009, 05:37 PM

what is the general rule of them when filling tire w/ air? it was like x amount of seconds per 1 psi.

Express · 12-15-2009, 05:44 PM

id be curious as well to know the answer to that.

Express · 12-15-2009, 05:44 PM

wouldnt it depend on the size of the tire also?

DV · 12-15-2009, 05:55 PM

I usually count about 1 psi/sec. on my car, but it will vary depending on your tire size. A good rule of thumb is to keep a pressure gauge in your car.

Darkcyd_Turbo · 12-15-2009, 06:05 PM

Quote:

Originally Posted by DV

A good rule of thumb is to keep a pressure gauge in your car.

lol

DV · 12-15-2009, 07:01 PM

Quote:

Originally Posted by Prowess Symphony

Gas station pumps and portable air compressors both have gauges. Can you even fill it with something that doesnt have a gauge?

The coin operated machines usually have gauges, but the gas stations that offer free air typically do not. Most of the ones I've seen look like this:

Peter@VMRWheels · 12-15-2009, 07:31 PM

Its different from pump to pump... as DV said, keep a gauge in your car. The gauges on the tire pumps are mostly inaccurate.

XDEEDUBBX · 12-15-2009, 07:45 PM

what psi do you guys use?

Peter@VMRWheels · 12-15-2009, 07:47 PM

^^ Its a matter of personal preference, for me at least! To start with, you can follow the OEM recommendations and adjust from there.

Tee212 · 12-15-2009, 07:48 PM

Quote:

Originally Posted by XDEEDUBBX

what psi do you guys use?

On what application?
tire profile?
nitrogen or ambient air?
hot or cold inflation?

I run 40psi cold on stock run flats.

jpsum · 12-15-2009, 07:48 PM

there is no such thing. Every pump is different.

ansch · 12-16-2009, 02:08 AM

I wouldn't trust the "gauge" on the pump either. Most are so inconsistent after being ran over by trucks and what not

UncleWede · 12-16-2009, 10:22 AM

The "stocking stuffer" ones at most auto stores cost, what, $1.99? Get one, best 2 bucks you'll spend on your car (as long as you use it)

Best regards,
Wede

Gary@TireRack · 12-16-2009, 10:34 AM

Quote:

Originally Posted by jpsum

there is no such thing. Every pump is different.

+1

There are so many variables that can affect this...

it is not safe to 'guess' at this. Use an air pressure gauge.

Ryan@IND · 12-16-2009, 04:02 PM

I usually count when filling the tire up with air, about 1 second per psi of air. HOWEVER, this is only an inaccurate "gauge" that gets me relatively close to the air pressure I want. You HAVE to use a gauge to get the correct pressure. Depending on the air pump, nozzle, tire, and wheel psi per second can vary by a LARGE range.

OlivaresAnthony · 12-18-2009, 05:57 AM

Quote:

Originally Posted by UncleWede

The "stocking stuffer" ones at most auto stores cost, what, $1.99? Get one, best 2 bucks you'll spend on your car (as long as you use it)

Best regards,
Wede

+1

I bought a $5 one at AutoZone. Every 1st of the month I check my tire pressure.

Dan335i · 12-20-2009, 06:03 PM

I run 34 ft and 37 rear cold on my BS rft.Thats 2 over stock front and rear,and it works for me.

12-15-2009, 05:37 PM	#1
hl0m4n Major General 2307 Rep 5,627 Posts Drives: BMW Join Date: Nov 2006 Location: NY iTrader: (58)	General Rule Of Thumb When Filling Tire W/ Air? what is the general rule of them when filling tire w/ air? it was like x amount of seconds per 1 psi. __________________ Cars: 07 335i ► 08 328i ► 11 328xi ► 13 M3 ► 17 M4 ► 14 M6
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12-15-2009, 05:44 PM	#2
Express Major General 380 Rep 8,688 Posts Drives: 06 330i Join Date: Dec 2008 Location: The Promise Land iTrader: (17) Garage List 2006 BMW 330i [8.30]	id be curious as well to know the answer to that.
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12-15-2009, 05:44 PM	#3
Express Major General 380 Rep 8,688 Posts Drives: 06 330i Join Date: Dec 2008 Location: The Promise Land iTrader: (17) Garage List 2006 BMW 330i [8.30]	wouldnt it depend on the size of the tire also?
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12-15-2009, 05:55 PM	#4
DV Lieutenant 93 Rep 499 Posts Drives: F36 440i Join Date: Jul 2009 Location: Oakland County, MI iTrader: (10) Garage List 2017 BMW 440i Gran ... [0.00]	I usually count about 1 psi/sec. on my car, but it will vary depending on your tire size. A good rule of thumb is to keep a pressure gauge in your car.
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12-15-2009, 07:31 PM	#7
Peter@VMRWheels BimmerPost Supporting Vendor 94 Rep 685 Posts Drives: P85D Join Date: Mar 2009 Location: Irvine, CA iTrader: (0)	Its different from pump to pump... as DV said, keep a gauge in your car. The gauges on the tire pumps are mostly inaccurate.
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12-15-2009, 07:45 PM	#8
XDEEDUBBX Lieutenant Colonel 65 Rep 1,715 Posts Drives: 535I Join Date: Mar 2009 Location: Los Angelz iTrader: (11)	what psi do you guys use?
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12-15-2009, 07:47 PM	#9
Peter@VMRWheels BimmerPost Supporting Vendor 94 Rep 685 Posts Drives: P85D Join Date: Mar 2009 Location: Irvine, CA iTrader: (0)	^^ Its a matter of personal preference, for me at least! To start with, you can follow the OEM recommendations and adjust from there.
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12-15-2009, 07:48 PM	#11
jpsum Major 286 Rep 1,088 Posts Drives: 2010 TSX Join Date: Dec 2008 Location: New Haven area iTrader: (4)	there is no such thing. Every pump is different.
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12-16-2009, 02:08 AM	#12
ansch Captain 33 Rep 646 Posts Drives: SGM 135i Join Date: Dec 2008 Location: Brisbane, Australia iTrader: (1)	I wouldn't trust the "gauge" on the pump either. Most are so inconsistent after being ran over by trucks and what not
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12-16-2009, 10:22 AM	#13
UncleWede Long Time Admirer, First Time Owner 18460 Rep 9,428 Posts Drives: G01 X3 M40i Dark Graphite Join Date: Jun 2005 Location: Oxnard, CA iTrader: (0)	The "stocking stuffer" ones at most auto stores cost, what, $1.99? Get one, best 2 bucks you'll spend on your car (as long as you use it) Best regards, Wede
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12-16-2009, 04:02 PM	#15
Ryan@IND 1815 Rep 7,665 Posts Drives: ACR Join Date: Mar 2008 Location: Chicago iTrader: (18)	I usually count when filling the tire up with air, about 1 second per psi of air. HOWEVER, this is only an inaccurate "gauge" that gets me relatively close to the air pressure I want. You HAVE to use a gauge to get the correct pressure. Depending on the air pump, nozzle, tire, and wheel psi per second can vary by a LARGE range. __________________ IND DISTRIBUTION \| 866-963-4520 • INSTAGRAM • FACEBOOK • FLICKR
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12-20-2009, 06:03 PM	#17
Dan335i Lieutenant Colonel 33 Rep 1,786 Posts Drives: 07 335i coupe 6MT,w/sp. pack. Join Date: Oct 2007 Location: orange county NY iTrader: (2)	I run 34 ft and 37 rear cold on my BS rft.Thats 2 over stock front and rear,and it works for me.
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