gallery pressure

[ftillier]

I was hoping to get some data points from the community regarding gallery pressure changes over time. Specifically, I'd like the following data from folks that have an IID Tool and are inclined to document behavior:

1. From cold start, starting gallery pressure, ending gallery pressure and elapsed time when compressor shuts off. This assumes the vehicle doesn't need a lot of height adjustment upon start.
2. when raising from normal to off-road height, ideally when the car's been running for a bit so the system is at steady state: gallery pressure peak when the reservoir valve is opened; gallery pressure and elapsed time when the compressor kicks on; gallery pressure and elapsed time when front corner valves close; gallery pressure and elapsed time when compressor turns off.
3. Please note model year and if you have Hitachi or AMK compressors, and if you know it, age of the compressor.

I believe my compressor may be having issues, but wasn't able to find much in terms of information for what "normal" pressures are (over time).

Thanks!

 

[Longtrail]

I can offer the charts in this thread:

2012 LR4 Reluctant to lower from off-road suspension mode

Here's the exhaust valve opening just after ignition on: The resulting gallery pressure (time axis is different because of the software being used) Driving down the road this then happened to the gallery pressure at the same time that the C1A13-64 triggered: I'm losing my mind on this one!

www.landroverworld.org

They're not exactly what you're after but I believe in the thread I speak about gallery pressure (it's 230 psi if I recall?). If I get some time I'll see if I can chart more, I'm a little rusty as my suspension has been behaving once it had the right firmware. Also, in that thread I purchase and install a new compressor! It may be worth a read for you? My compressor is an AMK, 2012 Model year, compressor is about a year old now.

 

[Longtrail]

Just found this for gallery pressure: ~240-260psi

I purchased the AMK compressor in the UK from Island4x4 (this was a quick search so please verify), also I read you have a Hitachi, personally I'd swap to the AMK but you have to flash the firmware:

Air Suspension Compressor (From 2009) D4 & Range Rover Sport LR061888 LR078650 Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.

Air Suspension Compressor (From 2009) D4 & Range Rover Sport LR061888 LR078650 Land Rover parts, Land Rover spares, Range Rover parts and accessories for Freelander, Discovery, Defender and Series models. UK and worldwide mail order. Competitive prices.

www.island-4x4.co.uk

This is £349.99 which is about $440 (at current exchange rate), shipping was pretty cheap and easy. I also purchased the gap tool from these guys as it was cheaper.

 

[djkaosone]

My 2011 LR4 5.0 V8 HSE Lux has a relatively new Hitachi compressor, all oem valve blocks, and less than 6 mo old oem air shocks all around. The old compressor was working, but took too long to get to the correct pressures. From memory, on normal height at start up it's relatively low ~50 psi or less, compressor kicks in, galley pressure reaches ~250 psi, and then purges off into ~50 or less psi.

 

[ftillier]

Just found this for gallery pressure: ~240-260psi

I purchased the AMK compressor in the UK from Island4x4 (this was a quick search so please verify), also I read you have a Hitachi, personally I'd swap to the AMK but you have to flash the firmware:

Air Suspension Compressor (From 2009) D4 & Range Rover Sport LR061888 LR078650 Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.

Air Suspension Compressor (From 2009) D4 & Range Rover Sport LR061888 LR078650 Land Rover parts, Land Rover spares, Range Rover parts and accessories for Freelander, Discovery, Defender and Series models. UK and worldwide mail order. Competitive prices.

www.island-4x4.co.uk

This is £349.99 which is about $440 (at current exchange rate), shipping was pretty cheap and easy. I also purchased the gap tool from these guys as it was cheaper.

I ordered a new Hitachi for $480 delivered, should be here Monday. I was logging gallery pressures yesterday and tried searching for that term but came up largely empty handed. I figured leaving some data that comes up in searches might help someone in the future. Strangely I did not get many codes, only:

C1130-66 (AF) Air spring air supply - Algorithm based failure - signal has too many transitions/events

When I was mucking around yesterday I did get the temperature warning due to the compressor running too much.

 

[ftillier]

I failed to capture the startup sequence, you have to turn the ignition on, start the live capture, and then crank the engine... I did get the height change, but the system properly pressurized. So the height change took 5-10 seconds, then about two minutes to reach 1720 kPa (250psi) again.

 

[djkaosone]

At first start:

Airing up to off road height:
Resting after off mode height is reached:

 

[ftillier]

Any idea how quickly you got back to 250psi after the height change?

 

[djkaosone]

I want to say about 30 seconds, but for sure less than 1 minute.

 

[ftillier]

If you view the graph in the IID tool (rather than numeric data) you'll have a chance to see the data trends (including elapsed time). But if it's less than a minute, it sounds like my compressor might indeed be tired.