Thread: Suspension problem.

I recently fitted LR's +40, with much appreciated help from ChookD2, with new Bilsteins. I wouldn't hesitate to fit the same combination again. The ride is superior to the air sprung rear.
I only fitted +40s as standard height are no longer available.

I'm pretty sure that just allowing for the load isn't accurate.
The load you refer too is about a meter or so forward of the springs, so they have a leverage effect(that is the 70 odd kg of bar and winch) .. so the load on the springs will be more than the roughly 150lb you think it is.

When I replaced the springs on the D2(bar and winch too) I told LRA this, and he recommended the 'blue/green' springs which were 200lb/in and 15.7"(400mm) free length.

I have no idea what the old springs were, they weren't far off in free length, but a bit smaller(millimeters) in coil thickness.
I wrote down all the data of sitting height and stuff on a note pad, but have lost the note pad now.

But at the same time I changed old worn shocks too, so any height info I relay to you won't be the same for you, even tho we have roughly similar vehicle setup.
But final effect of 2" light springs for me actually gave close too or actual ride height of +2".

ps. I didn't measure the hub centre to wheel arch height, I measured bump stop clearance .. but the same difference anyhow.

note that I did all springs and shocks. rear shocks weren't as bad as the old worn fronts. With the all new suspension vs aftermarket old setup(which I reckon was a 2" lift too .. just worn) rear didn't settle all that much higher as the old setup, maybe 1/2" or so more than old, but front definitely did.

Originally Posted by AK83

I'm pretty sure that just allowing for the load isn't accurate.
The load you refer too is about a meter or so forward of the springs, so they have a leverage effect(that is the 70 odd kg of bar and winch) .. so the load on the springs will be more than the roughly 150lb you think it is.

When I replaced the springs on the D2(bar and winch too) I told LRA this, and he recommended the 'blue/green' springs which were 200lb/in and 15.7"(400mm) free length.

I have no idea what the old springs were, they weren't far off in free length, but a bit smaller(millimeters) in coil thickness.
I wrote down all the data of sitting height and stuff on a note pad, but have lost the note pad now.

But at the same time I changed old worn shocks too, so any height info I relay to you won't be the same for you, even tho we have roughly similar vehicle setup.
But final effect of 2" light springs for me actually gave close too or actual ride height of +2".

ps. I didn't measure the hub centre to wheel arch height, I measured bump stop clearance .. but the same difference anyhow.

note that I did all springs and shocks. rear shocks weren't as bad as the old worn fronts. With the all new suspension vs aftermarket old setup(which I reckon was a 2" lift too .. just worn) rear didn't settle all that much higher as the old setup, maybe 1/2" or so more than old, but front definitely did.

Thanks, this is what LRA recommended, nice to know that it works ok.

Originally Posted by Bohica

Thanks, this is what LRA recommended, nice to know that it works ok.

LRA did my “spring lift” 10 year ago - I’ll still have paperwork so I will check and let you know asap.

LRA have a spring chart that will give you spring hight for a given axle load, it's corrected for unsprung weight.
Get a front axle weight from a weigh bridge and use the chart.

https://lrautomotive.com.au/contents...%20142_000.gif

The resolution isn't great, but it give an idea.

Or take the info to them, with a vehicle description and the outcome you want.

Tony

Originally Posted by onebob

LRA did my “spring lift” 10 year ago - I’ll still have paperwork so I will check and let you know asap.

yeah, I found my info via the easier to find invoice .. just can't find the notepad I wrote all my data on, in the 'tornado affected' shed!

I know its there, just where in there.
What I do know tho is:

1/. time flies! via photos, I found that I did the suspension replacement in Sep 21! Felt just like yesterday! .. or more correctly last year or so .. anyhow ..

2/. I only took photos of the shocks for comparison to the Bilsteins. Billies were about 15-20 mm longer, extended, and a just a smidge shorter(or same) fully compressed, which was damned hard on the billies, but easy as on the old shocks.

Old shocks were OME, so I presume that the springs may have been(can't recall any markings on them).

Springs were all over the place a bit too, in that the new ones were all ever so slightly longer (free), but that the new ones(dobinsons) also had the usual LR drivers side differences in a few mm too(so had to remember to allocate the longer ones for the drivers side too. But from memory, I'm 99.9% sure that all the old ones had settled compared to the new ones.

I reckon that a lot of the (very obvious) lift on the front could have been attributed to the new properly pressurized billies, which were hard to keep compressed(had to use a ratchet strap), where the worn out OMEs were easy to compress and took a while to extend again for those that did, and at least one wouldn't at all.

D2 with Bullbar and winch performs nicely with ~225lb front springs...

I did a LOT of development work back then (incl with ARB and Kings)

Originally Posted by onebob

LRA did my “spring lift” 10 year ago - I’ll still have paperwork so I will check and let you know asap.

Found my invoice and my notes….I have 15.90” / 180psi White Tiger ‘pink’ springs and Bilstein BE5-B994 shocks in the front.
From RAVE the LR std spec Front height measurement from hub centre to wheel arch is 500mm +/- 15mm, and after the LRA upgrade it measured 520mm.