AC Compressor for On-board air - Defender Source
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  #1  
Old June 29th, 2008, 10:38 PM
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Mike
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Lightbulb AC Compressor for On-board air

Has anyone pulled their ac out and used the compressor as their on-board source?
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  #2  
Old June 30th, 2008, 09:58 AM
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Michele
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I'm doing it.
Slowly
Just need to pull the line-s,decide where to place the air chucks and fab a couple of brackets.

You can find good infos on lr4x4.com BB, in the tech archive...
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  #3  
Old June 30th, 2008, 10:42 AM
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Yup, works great.
ECR4 had it too. Worked perfect for tires, needed a bigger air tank for air tools, but it would still run an impact, you just had to let it catch up a little periodically.
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  #4  
Old June 30th, 2008, 09:31 PM
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Mike
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Quote:
Originally Posted by Cube II
I'm doing it.
Slowly
Just need to pull the line-s,decide where to place the air chucks and fab a couple of brackets.

You can find good infos on lr4x4.com BB, in the tech archive...

I'm not finding it.

Follow-up Post:

Quote:
Originally Posted by ECR
Yup, works great.
ECR4 had it too. Worked perfect for tires, needed a bigger air tank for air tools, but it would still run an impact, you just had to let it catch up a little periodically.

Any site or place where i can see how to do this?
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  #5  
Old July 12th, 2008, 10:14 PM
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Try this:

http://forums.lr4x4.com/index.php?sh...air+compressor and http://forums.lr4x4.com/index.php?sh...air+compressor


You will need to register if you haven't already.


Mike,

If you read this, can you shed some light on setting up the EFI/ECU to recognize the compressor is activated?

Thanks,

Greg
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  #6  
Old July 13th, 2008, 11:16 AM
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Mike
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Thanks Greg. That definitely helps.
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  #7  
Old July 14th, 2008, 07:00 PM
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Charles Galpin
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Planning on doing this myself. Why does the ECU need to know, to adjust the idle speed?

charles
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  #8  
Old July 14th, 2008, 07:38 PM
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Having a difficult time finding some of the parts needed, Filters, oilers, valves, regulators, etc.
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  #9  
Old July 14th, 2008, 09:33 PM
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Greg
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Charles,

This was posted by Mike from ECR a few months ago:

". . . it can be . . . tied into the EFI ECU so that the engine will not flare/ stumble at idle when the compressor clutch kicks on and off. Its an easy fix.

If you want to tie it into the EFI ECU like the factory intended its easy and I can tell you how to do it."



Sounds like a good idea, if it is easy.
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  #10  
Old July 15th, 2008, 09:55 AM
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Post

Sorry I didn't reply I've been away.

As to the parts, try and check this out:
Kilby



Quote:
Originally Posted by mdmccallum
Having a difficult time finding some of the parts needed, Filters, oilers, valves, regulators, etc.
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  #11  
Old July 15th, 2008, 12:35 PM
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Quote:
Originally Posted by Cube II
Sorry I didn't reply I've been away.

As to the parts, try and check this out:
Kilby

Whoohoo

Thanks Cube.

Project will be underway soon.

Follow-up Post:

There is an article on this topic in the Sept 08 (in magazine stands now) issue of 4 wheel drive and sport utility magazine. Kilby enterprises Airboss Onboard Air System.

Follow-up Post:

http://www.4x4groupbuy.com/store/onb...-c-49_931.html

the Viair system looks much cheaper.
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  #12  
Old July 15th, 2008, 03:14 PM
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Quote:
Originally Posted by Bozman
Charles,

This was posted by Mike from ECR a few months ago:

". . . it can be . . . tied into the EFI ECU so that the engine will not flare/ stumble at idle when the compressor clutch kicks on and off. Its an easy fix.

If you want to tie it into the EFI ECU like the factory intended its easy and I can tell you how to do it."



Sounds like a good idea, if it is easy.
Basically the ECU gets a signal and then once it adjusts the engine it offer a ground to run the relay or compressor clutch. Comes in on pin #27 to the ECU (power) then comes out as a ground on pin #33.
Same when you shut off the device, it makes sure the stepper doesn't go bat-shit trying to compensate and keeps the idle smooth and steady.
In a 95 D90 this is wired into your AC at the multi connector near the evap. On 94s it is in the engine bay near the heater (same place on 110s). So you can wire a relay to run the compressor clutch or if you have a 2 wire clutch just use the output for the ground on the clutch.
There are inputs in the 14CUX for the automatic gearbox and the heated windscreen, basically anything that requires the engine to adjust to a load is just putting in the right wires to the 14CUX. It can be done in a GEMS as well but its a little more work.
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  #13  
Old July 15th, 2008, 04:56 PM
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Mike
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Quote:
Originally Posted by ECR
Basically the ECU gets a signal and then once it adjusts the engine it offer a ground to run the relay or compressor clutch. Comes in on pin #27 to the ECU (power) then comes out as a ground on pin #33.
Same when you shut off the device, it makes sure the stepper doesn't go bat-shit trying to compensate and keeps the idle smooth and steady.
In a 95 D90 this is wired into your AC at the multi connector near the evap. On 94s it is in the engine bay near the heater (same place on 110s). So you can wire a relay to run the compressor clutch or if you have a 2 wire clutch just use the output for the ground on the clutch.
There are inputs in the 14CUX for the automatic gearbox and the heated windscreen, basically anything that requires the engine to adjust to a load is just putting in the right wires to the 14CUX. It can be done in a GEMS as well but its a little more work.

So How would I do this on a '97?
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  #14  
Old July 23rd, 2008, 08:40 PM
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Mike
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Parts ordered from Viair (much cheaper than Kilby and easier to deal with, ask for Shawn).
I plan on having a coupler exit from my rear crossmember. 2 gal tank mounted under the passenger seat on the frame b/w the rock slider and the frame. The more I research this the easier it appears to be. I'm sure I'm disillusioned.
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  #15  
Old August 3rd, 2008, 08:44 PM
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Quote:
Originally Posted by ECR
Basically the ECU gets a signal and then once it adjusts the engine it offer a ground to run the relay or compressor clutch. Comes in on pin #27 to the ECU (power) then comes out as a ground on pin #33.
Same when you shut off the device, it makes sure the stepper doesn't go bat-shit trying to compensate and keeps the idle smooth and steady.
In a 95 D90 this is wired into your AC at the multi connector near the evap. On 94s it is in the engine bay near the heater (same place on 110s). So you can wire a relay to run the compressor clutch or if you have a 2 wire clutch just use the output for the ground on the clutch.
There are inputs in the 14CUX for the automatic gearbox and the heated windscreen, basically anything that requires the engine to adjust to a load is just putting in the right wires to the 14CUX. It can be done in a GEMS as well but its a little more work.
Thanks Mike,

That is a big help.
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  #16  
Old August 3rd, 2008, 10:05 PM
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Quote:
Originally Posted by mdmccallum
I plan on having a 2 gal tank mounted under the passenger seat on the frame b/w the rock slider and the frame. The more I research this the easier it appears to be. I'm sure I'm disillusioned.
I used the air tank off a late model Range Rover Classic and fabbed up some brackets to mount the tank out board of the frame rail between the slider and the frame. It's tucked up pretty well where everything is protected. The compressor is mounted in the compartment under the passenger seat. Its similar to a Puma unit (got it from Rover Solutions at MAR a few years ago).

Follow-up Post:

Here are a couple of pictures of the air tank installation:
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  #17  
Old August 17th, 2008, 10:59 AM
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Mike
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Finished this project yesterday. Works awesome.
Cost:
Viair tank $55
Viair Pressure regulator, gauge, switch, tubing a fittings $85
Misc parts from local ACE hardware $25
Inline filter $15

Pics coming if interested.
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  #18  
Old August 18th, 2008, 05:47 PM
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Charles Galpin
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Good to hear. Would love to see pics!
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  #19  
Old August 18th, 2008, 07:08 PM
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Mike
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Here's the results. I am not the best at tucking things away and making everything neat but it came out pretty nice.
This is the gauge and switch:


Compressor


Pressure regulator


Tank and filter



Chuck in rear cross member


Angus and Rider sat here the whole time I worked on it
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  #20  
Old August 20th, 2008, 01:02 PM
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Todd Kendrick
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Wow! Nice job Mike. I cant wait to see it in Moab. Go Dawgs!
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