On Board Air

[yotanut]

I acquired a freebie new 3 gallon tank from work and want to put it to use.
I want to go with a good, reliable electric air compressor.
What experience do you all have with different compressors? good or bad.
-Duane

 

[CruisinGA]

Why electric?

It is very inexpensive and easy to bolt a york onto a 2F. Much more air, no strain on electrical system.

www.kccruisers.com has the brackets.

 

[foxfab]

http://www.extremeoutback.com/

 

[cardinal fang]

Have a look. A how to onboard air.
http://www.wejacks.com/onboardair/onboardair.html

 

[Jetboy]

2nd on the york, Electric are like .5cfm york = 8-12 cfm depending on model, and cheaper than electric. no brainer, I still cary my electric for backup, but havent used it in two+ years.

 

[Pin_Head]

Yorks are 7-10 cubic inches displacement; not CFM. They will put out about 0.5 to 3 CFM @ 90 PSI depending on how fast they turn.

 

[Jetboy]

I believe you are incorrect, actualy I'm pretty sure, the 10 cu in york puts out 4cfm @90psi at 1200rpm and will produce over 8cfm 90psi @3000rpm. They are capable of producing 16+CFM @100psi at higher RPM when hooked to an electic motor....for $1000. The GM compressors are a little faster I believe but am not sure. they do take more work and money to set up properly though. I would like to se any electric keep up with a york when filling 4 tires, more like 8 becuae you usualy have to fill a buddies too. Plus they don't overwork the elecrical system.

 

[Pin_Head]

It's a pretty simple calculation:

1728 cu in per cu ft.
You need to compress 6 cu ft at atmpspheric pressure to 1 cu ft to get it to 90 PSI, so you need to compress 10,368 cu in to make 1 cu ft at 90 PSI.

That works out to 1,036 turns per cu ft @ 90 PSI for the 10 cu in compressor or 1CFM at 1, 036 RPM. That would be 0.5 CFM at idle and 3 CFM at 3,000 RPM.

Maybe you were thinking CFM at 0 PSI?

 

[Jetboy]

That's correct. VAF = (CI/1728) x (RPM) x VE
Except as far as I can tell, may calcs may be wrong?,If I used Boyle Law correctly the constant to get to 90 psi is 1.6 thus 1200 rpm =4.3cfm @ 90 psi,
But I My degree is in finance, minor in math so I'm not sure I used it correctly.

 

[Jetboy]

Anyway I ended up close to the output published on these sites so I think that I am close either that or none of us know what the Heck we are talking about, which could be the case

http://www.onboardair.com/

http://www.tmcom.com/~tsm1/scout/faq/york.html

Be back tomorrow to find out how little I know

 

[CruisinGA]

It's the best option out there, who G.A.F what the numbers are...



BTW, Pin Head is the last person on the board I would call out on incorrect information...

 

[Pin_Head]

The CFM specs in the second link are correct, but they are at 0 PSI.

Ambient atmpspheric pressure is approx. 14.7 PSI, so you need a compression ratio of approx 6 to get 90 PSI. If you divide the CFM at 0 PSI by 6, you get approximately the same values I posted above.

 

[yotanut]

So thats a negative on the electric..
Those york mounts look good.
I was just looking for feed back on the various electric compressors out there.
I am capable of putting together onboard air, as I am a heavy equipment mechanic. I have all the brass and doodads I need outside in my work truck.

I might just do the york anyway. My Dad has a good one laying around.
Thanks for all the input and GD math.
-Duane

 

[Josie'sLandCruiser]

Hi All:

Having aired-up a number of tires with the 'lil ARB compressor, I can tell you that an electric compressor will do the job, but it will be slooooooow!

To air-up big tires in a reasonable amount of time, or to operate air tools requires a fair amount of volume, which the typical elctric air compressor cannot deliver. A belt-driven compressor can deliver the air flow (volume) easily, as can a couple of the really expensive elctric pumps (Quick Air 3, and that $600 unit that uses a starter motor to power the pump.)

Regards,

Alan
Seattle

 

[4Hummer]

CHEAP Compresser $49.95 at Kargen

Well heres a quickie write up on my latest MOD. it's something EVERYONE wants but for the most part its to EXPENSIVE.. Well ladies and Gents Here it is....

(Drum roll Please) :alert: :alert: :alert: :alert: :alert: :alert: :alert:

This is a DV-Inovation MF-1050 flows 72 Liters per minute.

This unit is NICE, made from STEAL not Pastic

I mounted the unit Beside the Brake Booster on the drivers side. Bolted it down to the Fender well. Theres enough room to even store the hose

 

[4Hummer]

Here is the 4Air System, Mine is a knock off of the GREAT Roger Brown's Creation. BUY YOURS from Roger Brown as it will be cheaper for you, and his design is a little better. UNLESS you order all the pieces in BULK and build one for all of your 4x4 club members.(as we did). Rogers setup is the way to go

Now the fun part. I can deflate all 4 tires to the EXACT same PSI and go from 31 psi to 9 psi In 2 Minutes and 25 seconds

Close the Valve, hook up the air line, and turn on the Compressor. I can Inflate all 4 Tires from 8psi back to 31 psi in 13 minutes and 48 Seconds. (BTW I have 31" x 10.5 M/T's)

Complete Write Up on my website. (You may have to hit "SHIFT and the Refresh" button for the page to show if you been to my site before)

If you wanna order your compressor contact: Ed Lorenzen over at Motor City Imports: 209-529-2886 or email: awsumfn@sbcglobal.net Tell him Michael Sent you. Or Kargen in the USA is selling off last years model the MV-50 for $49.95 or something like that

 

[paranoid56]

well, i think you are wrong
the york compessers, like the oasis one, can pump out 16cfm at 175psi
http://www.oasisoffroad.com/p2.html
Shane

 

[Pin_Head]

LOL

I'm sure it can, just not both at the same time.

 

[Bad Coco]

what vehicles do you pull the york from? Looking to get one for my fj40 but have no clue as to what to pull one from at pick n pull

 

[trainrech]

Volvos