Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Onboard CO2; Poll about tank size.

Discussion in 'The Garage' started by mrk5, Jul 29, 2004.

  1. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

    Joined:
    Apr 20, 2004
    Posts:
    12,347
    Likes Received:
    1,050
    Location:
    Northern Colorado
    I'm looking to make my own CO2 setup. I'm wondering what size tank to get. I'm only going to use it for tires, no air tools. I have 33s on 15s. I usually wheel with my father (31s on 15s) and my brother-in-law (35s on 16s). We all usually only air down to about 18-20lbs, and we rarely do more than one trail in a weekend. So what size do you all think would be best?
     
  2. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

    Joined:
    Jan 25, 2001
    Posts:
    1,040
    Likes Received:
    1,107
    Location:
    Dallas
    10 & 15 lb tanks fit into a standard fire extinguisher holder while the 20 lb tank is larger in diameter and has fewer mounting options. I have a 15 lb tank and filled about 30 of my 35s from 10-40 psi.
     
  3. k5freak44

    k5freak44 1/2 ton status

    Joined:
    Jun 1, 2004
    Posts:
    2,164
    Likes Received:
    0
    Location:
    Plano, TX
    Im the first naked one! /forums/images/graemlins/waytogo.gif
     
  4. boggerless

    boggerless 1 ton status Premium Member

    Joined:
    May 26, 2003
    Posts:
    22,728
    Likes Received:
    96
    Location:
    dearborn heights, Michigan
    WOW, then one of my 72lb scuba tanks should last alooong time.what do you guys use for the top of the tank?i don't think converting a scuba regulater would work cuz it.s low pressure for breathing? /forums/images/graemlins/k5.gifto /forums/images/graemlins/truck.gif
     
  5. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

    Joined:
    Apr 20, 2004
    Posts:
    12,347
    Likes Received:
    1,050
    Location:
    Northern Colorado
    [ QUOTE ]
    I have a 15 lb tank and filled about 30 of my 35s from 10-40 psi.

    [/ QUOTE ]

    /forums/images/graemlins/yikes.gif That's a lot. I didn't realize even a 15 lb would last that long.
     
  6. 85mudblazin

    85mudblazin 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    3,951
    Likes Received:
    0
    Location:
    Austin,TX
    Yea co2 last along time, I made my own and it is out of a 10lb tank with a welding regulator but he regulator doesnt put out enough air to air up tires fast so I think I might look into getting another regulator and just switch them out when I want to weld. I made my own tank mount you can see it in my webshots folder thats in my sig.
    -Chris
     
  7. mcinfantry

    mcinfantry 1/2 ton status

    Joined:
    Dec 2, 2003
    Posts:
    308
    Likes Received:
    0
    [ QUOTE ]
    WOW, then one of my 72lb scuba tanks should last alooong time.what do you guys use for the top of the tank?i don't think converting a scuba regulater would work cuz it.s low pressure for breathing? /forums/images/graemlins/k5.gifto /forums/images/graemlins/truck.gif

    [/ QUOTE ]

    co2 is 20lb liquid
    diving air is just that, gas. less "air" in an air tank

    20lb co2 is enough for me to fill 38x11 tires from 10~60psi twice
     
  8. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
    Posts:
    5,855
    Likes Received:
    0
    Location:
    Hollister, CA
    [ QUOTE ]
    [ QUOTE ]
    WOW, then one of my 72lb scuba tanks should last alooong time.what do you guys use for the top of the tank?i don't think converting a scuba regulater would work cuz it.s low pressure for breathing? /forums/images/graemlins/k5.gifto /forums/images/graemlins/truck.gif

    [/ QUOTE ]

    co2 is 20lb liquid
    diving air is just that, gas. less "air" in an air tank

    20lb co2 is enough for me to fill 38x11 tires from 10~60psi twice

    [/ QUOTE ]

    I think your mistaken on that.. I have a 20lb tank. I probably filled my 36's from 6 pds to 35. 30 to 40 times and used air tolls in between.
     
  9. mcinfantry

    mcinfantry 1/2 ton status

    Joined:
    Dec 2, 2003
    Posts:
    308
    Likes Received:
    0
    well i measured my tank from empty to full. it IS 20lbs. i let the air out my tires from 60 to 10. i aired them up. i did it again the next weekend. i have enough air to run air tools but not enough to fill the tires again. i guess i could be lying, and so could the scale???
     
  10. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
    Posts:
    5,855
    Likes Received:
    0
    Location:
    Hollister, CA
    [ QUOTE ]
    well i measured my tank from empty to full. it IS 20lbs. i let the air out my tires from 60 to 10. i aired them up. i did it again the next weekend. i have enough air to run air tools but not enough to fill the tires again. i guess i could be lying, and so could the scale???

    [/ QUOTE ]

    I didn't say you where lying.. Just mistaken.. Maybe you have a leak on yours?? I have had mine for almost 3 years. I think I have had it filled up 4 times in that time..
     
  11. mcinfantry

    mcinfantry 1/2 ton status

    Joined:
    Dec 2, 2003
    Posts:
    308
    Likes Received:
    0
    i agree with you,i dont know why it does that. only thing i can think of is because the air pressure is so high. anyone know how much volume it takes? is air pressure linear or exponential???
    i.e. 10-35psi is 25 psi increase. is 35psi-60psi (again 25psi) the same volume????

    no leaks i can find....
     
  12. az-k5

    az-k5 1/2 ton status

    Joined:
    Oct 15, 2003
    Posts:
    2,774
    Likes Received:
    0
    Location:
    Phoenix AZ
    14.7 psi is normal pressure (ouside). 30 psi is twice and 60 would be 4X. So filling all four of your 38's from 10 -> 60 is like filling 8 of them from 10 -> 35 or so. It takes a lot more air to create 60 psi than 30 psi. 30 psi is like 2 gallons of air in a 1 gal. tank, 60 psi is like 4 gal. of air in the same 1 gal. tank.

    I hope that clears it up, nobody is lying, somebody is just driving on rock hard tires (or a really heavy truck) /forums/images/graemlins/grin.gif
     
  13. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
    Posts:
    5,855
    Likes Received:
    0
    Location:
    Hollister, CA
    [ QUOTE ]
    14.7 psi is normal pressure (ouside). 30 psi is twice and 60 would be 4X. So filling all four of your 38's from 10 -> 60 is like filling 8 of them from 10 -> 35 or so. It takes a lot more air to create 60 psi than 30 psi. 30 psi is like 2 gallons of air in a 1 gal. tank, 60 psi is like 4 gal. of air in the same 1 gal. tank.

    I hope that clears it up, nobody is lying, somebody is just driving on rock hard tires (or a really heavy truck) /forums/images/graemlins/grin.gif

    [/ QUOTE ]

    /forums/images/graemlins/whistling.gif Sounds good to me... I always sucked at math... /forums/images/graemlins/whistling.gif
     

Share This Page