Lift information

[Langley]

Hi everyone, newby to this forum from the uk.

Looking to get my second p38 and making this one an off roader. Unlike in the uk you've Got parts and information that is greatly useful for this type of project.

I'm looking to lift the vehicle to run some 265/75/16's. I'm guessing a 2 in lift will be enough with standard airbags. An a sensor arm mod.

So what I'm wondering is,

Could anyone give me some more detail as too what lift blocks look like that are in use.
If I'm sticking with the stock bags for now, what dampers to use with the lift.
An finally, how much to lengthen the sensor arms by to take account of the lift.

Thanks in advance, an your forum is really inspirational.

[davidsonsm]

Take a look at "p38 lifted on air - questions". You'll get good appreciation. Personally I'd recommend the first job anybody does to their p38 is, fit the Arnott gen III 's. A far superior product irrespective of the lift issue.

[davidsonsm]

Sorry that post is titled "lifted p38 on air - questions".

[Langley]

Sorry that post is titled "lifted p38 on air - questions".

Hi thanks, but vie read every post in the board, an those on range rovers.net about the subject.

But I'm still unsure about the finer details an am looking to start with my lift before shelling out for new airbags as mine aren't that old.

[davidsonsm]

There is no off the shelf solution - not that I'm aware of. The guys that have lifts sourced the kit from Hard Range, which is no longer an option; OR have fabricated them themselves. This latter option is what I'm currently doing.

I've ordered 8 discs at 125mm dia. x 4mm thick which I'll weld in pairs to achieve 48mm of lift. The top discs will have the D shaped holes to receive the airbag bosses. The bottom discs will have D shaped bosses that will fit in to the axle. I plan to fit the TF144 and TF145 shocks from Terrafirma. I'm having the brake lines extended by 2" using st. stl. braided hoses. I plan to extend the rods/arms on the rear height sensors by 25mm on the top rods/arms and a turnbuckle on the lower rods/arms.

On the front sensors, I'll probably just lift the attachment point of the lower arm to the panhard rod, by 30mm or so - subject to checking the geometry (rather than extending the rods/arms).

Not weighed up yet whether I need to do anything with the ABS sensor cables.

[davidsonsm]

I'm currently running the same o.d. tyre without a lift kit. I've used the Gen III's to allow me to lift the standard and high EAS settings slightly. No rubbing (unless at access height on lock).

[Langley]

Hi thanks for the information thats really useful.

Its a shame but in the UK, there is a rather dim attitude to modifying the P38 for some reason so using a lift is somewhat frowned upon by many.

I shall look at fabbing up some spacers, quite tempted to put a rear airbag in the front of the vehicle as per the RR.net article. An try that for a while, as the cost of the Gen 3 bags is rather high..

What sort of bump stop extension would you use with a 2" lift?? Would you just increase the standards by the amount of lift used??

Also, the lengthening of the sensor arms, is there actually a correlation between how much you extend them to how much you lift the vehicle. Or, do you just have to lengthen and recalibrate afterwards.

~Thanks for the info its awesome.

[davidsonsm]

The main aim of the lift is greater articulation. So the idea is to avoid extending the bump stops at all. But the choice of shocks dictates the bump stop length ie the bump stop needs to be under compression in access height and allow a safety margin to avoid the shocks bottoming out. I also extended mine 20mm to help prevent abrupt stops at highway speed should the eas ever collapse.

With regards to the sensors, it's really down to geometry. The eas settings have upper and lower limits which allows a certain amount of error in the height sensor extension. Once again, you want the height sensor to still be below the upper eas upper limit and still with an elbow, once the shock is fully extended. The shock dictates the max extension.

Hence why the use of a turnbuckle on the lower arm gives a bit more leeway.

Hope that makes sense.