New project, OBA system...thoughts - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-05-2011, 11:53 PM   #1
Jeeper
 
Kevbz's Avatar
 
Join Date: Apr 2011
Location: O'Fallon, MO
Posts: 1,637
New project, OBA system...thoughts

I want to do an OBA system for no other reason than doing it. As for the back story I have a 99 2.5L with no a/c. I put a new altonator on the other day and realized with no a/c I have a ton of room on the pass side (stock airbox is gone also) so got to thinking and figured having no a/c could be a good thing.

My thoughts...

I am going to use a stock a/c compressor as my air source. I am shying away from the york style because of the additional fab work. Also I can then use a stock a/c length serp belt. I can use the pigtail/cannon plug that is just sitting there from the factory harness since i have no a/c to get a switch to the cab to kill the system until I need it (if i can find the other end, i am thinking its behind the climate controls)

Plumb in a small air filter, then inline oiler and then to the intake port.

Plumb out a line with a check valve, then a pressure switch on a tee (thinking 85/on 120/off) then into a tank, then out the tank with a 135 relief valve, gauge to the cab, and enough hose to reach around the whole jeep.

I am not going to use a oil/water seperator because I am not going to be running this for more than tire air and occasional quick air tool/maybe air up an air mattress camping. Maybe if there room and i can plumb it to look nice I will.

I am limited by my tank size. I have two areas under the body, one being right in front of the gas tank up hi, the other being along the frame rail on the driver side, or possibly in the open area when the airbox was. I can find 1/2 gallon up to 2.5 gallon in different configurations (long skinny, short and round) but being online I cant check fit unless i buy them.

Does anyone have a tank mounted under the body or in the engine bay? Anyone know the psi output of a stock a/c compressor? Is a 1/2 gallon a joke in size and not worth it? (its 6"x6.5"x7") what type of CFM's do I gain with a tank? I've heard the a/c compressor air is going to be hot...all copper/brass to the tank or high temp flex lines?

looking for thought and observations...and its much appreciated

Kevbz is offline   Quote Quick Reply
Old 06-06-2011, 02:31 PM   #2
Jeeper
 
Join Date: May 2010
Posts: 2,220
I'm in the middle of doing the exact same thing.

As far as temp, they supposedly get hot so most people use a small coil of copper pipe on the output of the compressor, which then feeds into the regular high pressure air hose. You could run copper all the way to the tank, but I would say thats way overkill. Everyone so far seems to be OK with just a small coil.

For tank size, I haven't heard of anyone using a 1/2 gallon; from my research, most seem to be using mainly between 1-2.5 gallons with a few 5 gallons here and there. Although I have seen several people not using any tank at all because they were simply using the compressor to fill their tires. Even without a tank it seemed to be working fine, so I'd say you would be OK with 1/2 gallon as long as you remember your limitations with it.

Other than that it sounds like you're on the right path. There is a post in General Discussion on here that has some good info, and there is much more on JeepForum.com. Do a little searching and you can find a lot of info on the subject.

geiman is offline   Quote Quick Reply
Old 06-06-2011, 05:46 PM   #3
Jeeper
 
Kevbz's Avatar
 
Join Date: Apr 2011
Location: O'Fallon, MO
Posts: 1,637
I was only thinking a tank for the remote chance of a small impact for lug nuts or maybe an air ratchet. I guess theres the cool factor like a gauge in the cab (but I will be out of the cab when using it so...??)

I didnt see much on here but I will check out Jeepforum.
Kevbz is offline   Quote Quick Reply
Old 06-07-2011, 02:13 PM   #4
Jeeper
 
Join Date: May 2010
Posts: 2,220
Yep, thats what I was going to use mine for. I mainly want it to air up my tires, but I figure there will be that time when it would be nice to run some air tools so I figure I might as well put a small tank in there. Might as well do it right the first time.
geiman is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
YJ Heating System Explained Wrangler Haven YJ Tech Forum 116 06-06-2014 01:46 AM
Electronic Vehicle Information Center Mikial JK General Discussion Forum 15 01-12-2012 12:14 PM
EVAP Emission Control System Leak Mosey TJ Tech Forum 1 04-20-2009 08:40 PM
Info on a Hydrogen System (with pictures) simpsonsdotcom TJ General Discussion Forum 3 04-03-2009 08:46 PM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 04:10 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC