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The only place for a coil spring is up Zebedee's arse
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Another project!

So I've bought this:
enter image description here

It is a Viair 485C and is capable of 200psi at a flow rate of 25l/min and a 100% duty cycle.
It's also supposed to be quiet according to their website (it isn't, not compared to the standard compressor anyway).

Should be good, if I can make it fit that is:
enter image description here

I'll need to redesign a complete new mounting and housing for the compressor and the valve block. Fun!

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Has anyone come across a 3D CAD model of the valveblock? Or even a dimensioned 2D drawing?

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Watching with interest. I do think the modest duty cycle of the original coupled with the increasing quality doubts of available replacements will make Viair and similar swaps more interesting, especially if coupled with on board air. Can't help with the dimensions I am afraid, but there are an increasing number of 3D scanners out there many someone will create a model for you?

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JLimmelman wrote:

Has anyone come across a 3D CAD model of the valveblock? Or even a dimensioned 2D drawing?

I have never seen a 3D CAD model or even an engineering drawing of the valve block.
The outside is a fairly simple shape, just rectangular blocks, so it should be possible to draw an approximation, to aid fitting it into a case for example.
However, the inside of the valve block is quite complex, with all the ports and internal passageways. To come up with a model showing all that detail it would have to come from official sources I think.
3D scanners are getting better all the time, so that maybe the route to get a scan of the outside of the block.

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Just use a spare valve block & driver pack assembly, and make a larger EAS housing ? You can use the existing hole pattern as template for the new housing.

You might need a louder stereo to drown out the pump noise !! BTW, what's that blue thing that looks like a motor ?

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Yes, I was pushing my luck hoping someone had a CAD model or drawing. I don't need the interior ports, basically just a "space claim" model around which to model the box.

I'm busy with the process of drawing sucah a model using my spare valveblock as Pete suggested. Progress so far:
enter image description here

I'm hoping that adding some decent sound deadening material designed into the new enclosure will help mute the noise of the compressor. We'll see!

The blue motor mounted on the left front strut tower is an ARB air compressor. Currently being used for tire inflation etc. but it is also plumbed in parallel with the EAS compressor with a one way valve. I can switch on to run when the EAS compressor runs as a backup if the EAS compressor might fail.

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Is this an upgrade or to mask other faults? I’ve only run out of air when I had a leak…..

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Nope, EAS works beautifully for normal use.
I had the compressor struggle to keep up on one 4x4 trail where I was cycling between standard and offroad height multiple times. Not a usual use case and I wasn't surprised.

The upgrade is so that I can use the onboard air reservoir for tyres, pressurizing a water tank etc.

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Sounds like a good plan!

I do remember mine giving up on an off road trial but put it down to the leaks I discovered. Maybe I would have run out of air anyway !

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The only reason I can see for changing/upgrading the compressor is if you have fitted Arnott Gen III's.

The extra 2" of lift that Gen III's give takes a lot of air. It quickly robs the tank when you put it on high. Not a problem if you are up to pressure and you go off road. One lift is fine. The problem arises when you go back on tarmac then go off road again. If the tank pressure has not built back up in time, it can't get back up.
FYI when I have bench tested rebuilt compressors with new seals, it took 6 mins or there abouts to get the accumulator from zero up to pressure. This was on the bench, not the car.
I personally like Marty's idea to fit two original type compressors. Like an installed spare with the ability to switch either one or both together.

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Spent some more time modelling up the valveblock.
At last!

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And next to the Viair compressor:

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Would be great if I can get the compressor mounted sometime this year!

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Wow !