Backstory: We have two P38s. A Black/grey interior Vogue 2000(W) on 125k and an Oslo Blue/cream interior 2001(51)on 67k-ish. We've had mine (the Black one) 6 or 7 years and Sooz for about 2 years. Both cars have replacement OE air springs. During that time, we've seen off 4 EAS compressors. Enough is enough.
We bought the current compressor in the blue car brand new from a reputable vendor with solid feedback and the serial number checked out with Dunlop. First it became very noisy, then the cut-out failed, all within a few months. It currently has a replacement glommed on the outside and spliced into the loom on the compressor cabling. But there's more.
The pump still goes through phases of loud vibration, then quiet. We stripped it and eye-balling it all looks fine. The loud phases reverberate though the whole car - makes a sound like something in the wheel arch, but it has done that in both cars so we know it is the compressor. We leak checked both cars by pulling fuse 29. Mine stayed up. Sooz sagged on one side of the back axle. Valve block and X8R valve block refurb kit are here awaiting her return. That explains, but does not excuse, the catastrophic failure of the pump after such a short time. I neither know nor care what's causing the noise or why the stat failed. It's going in the bin rather than waste the X8R compressor refurb kit in the workshop. As the blue car is completely stock, we'll keep it that way. We'll refurb the valve block and put the working pump from my car in there. Yes, my wife works on the cars with me. No, she's spoken for!
In consultation with the hive mind of the internet and Gilbertd, I've sourced a Viair 380C for the bargain price of £175. This has a 55% duty cycle and flow rate more than three times the stock pump. Vendor seems solid and I've used PayPal for added protection. Photos have disappeared from many of the threads I used to research this. The wiring looks (sounds) to be simple, with the orange wire now redundant and connected to the black ground wire, it's just a two-wire switched supply. However, If anyone has some pics relating to mounting and tidily hacking the existing enclosure, I'd be very grateful. I know I can mount it in parallel and keep the old pump as a bakup but I'm in Somerset, not Western Australia, so I'd prefer to go all in on the new unit. For our part, we'll take detailed pics and post back here for anyone interested in the pros and cons of what I'm about to attempt.
I'd like to finish with a simple question.
Does anyone known exactly what size and gender of NPT reducer I'll need to join the new compressor to the blue pipe?