Suspension lift with standard shockers

Submitted: Monday, Jun 08, 2009 at 14:21
ThreadID: 69610 Views:2371 Replies:3 FollowUps:7
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G'day all,

I am looking at getting a 2" lift for my '04 Navara, but my main query is do i have to replace my OME standard stroke shockers for shockers with a longer stroke.
My other question is should i replace my standard torsion bars with the H/D torsion bars as i only have a alloy bar?

cheers,

Lance
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Reply By: Ray - Monday, Jun 08, 2009 at 15:23

Monday, Jun 08, 2009 at 15:23
Why?
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Follow Up By: Member - Lance S (VIC) - Monday, Jun 08, 2009 at 16:01

Monday, Jun 08, 2009 at 16:01
Is that why should i get a lift or why should i replace the shockers etc.
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Reply By: Member - RobnJane(VIC) - Monday, Jun 08, 2009 at 20:58

Monday, Jun 08, 2009 at 20:58
Hi Lance,

We are about to embark on a similar exercise, and as we fitted Koni's early on I am only lifting 25mm to ensure standard length shockers will still be ok.

Given the terrain we've covered and plan to cover I am confident the 25mm (over standard) will be ok, not to say we won't need to be careful at times.

I am having the original springs reset plus having an extra leaf added, and will adjust the original t bars to suit.

I suggest it would be worth your while checking the fully extended and fully compressed spec of the OME shockers to see how that compares to the new installed length. In looking at the limited range of movement on the front end it seems there should'nt be a concern. One of the specialist suspension suppliers told me recently that for a 40 - 50 mm lift the standard length front shockers were ok, but longer rears would be required.

Hope this is of use/interest to you.

Rgds, Rob.
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Follow Up By: Member - Lance S (VIC) - Tuesday, Jun 09, 2009 at 13:11

Tuesday, Jun 09, 2009 at 13:11
Rob,

Thanks for the reply, made a number of phone calls today and most say between 35 - 40mm for the front and 50mm at least for the rear, i'm leaving it a bit late as i head off to the kimberley in under 3 weeks.

cheers,

Lance
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Reply By: MrBitchi (QLD) - Tuesday, Jun 09, 2009 at 15:04

Tuesday, Jun 09, 2009 at 15:04
What Rob said for the front. The max wheel travel is governed by the bump stops. The standard shocks allow enough travel in both directions to hit the bump stops and cranking the torsion bars won't change that.
I ran standard torsion bars on 2 pajeros for years with alloy bull bars with no problems, just cranked them up a bit.

On the rears you'd also probably be OK but a good set of aftermarket shockies will handle a lot better.
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Follow Up By: Member - Lance S (VIC) - Tuesday, Jun 09, 2009 at 15:20

Tuesday, Jun 09, 2009 at 15:20
G'day John, i just got off the phone to a 4x4 joint in Frankston and i am sure he was spinning me alot of ????. I said i wanted to keep the original torsion bars and my OME shocks and he said no you MUST replace them because of both the down and up travel. i know alot of Navara drivers who still have the original shocks on and they still adjusted the torsion bars, what ride they get, i think would be pretty ordinary tho.

I just don't want to throw away $$$ if i don't have too.

Serves me right to leave it so dam late.

cheers

Lance
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Follow Up By: MrBitchi (QLD) - Tuesday, Jun 09, 2009 at 15:50

Tuesday, Jun 09, 2009 at 15:50
Cranking the torsion bars a little won't have any effect on your ride. All you're doing is changing the angle of the bar. It still has the same spring characteristics and the shock is the original so it will still have the same rebound control. All your doing is changing where the "at rest" position of the suspension is. You'll end up with less down travel but more up travel as the swing arm is sitting closer to the bottom bump stop (which can be trimmed to get a little more down travel).
Changing shocks will change the rebound control (that's what shocks do...) and therefore the ride/handling of your truck.

If I were you and about to head off, I'd raise the back a little with some heavier duty springs to carry the weight, and put some new shockies under there, then just crank the front up about 20mm. Your standard front shocks should be fine.

Have a great trip...

PS.. make sure you get a wheel alignment after cranking the torsion bars. Can cause the camber angle to change dramatically..
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Follow Up By: Member - Lance S (VIC) - Tuesday, Jun 09, 2009 at 15:57

Tuesday, Jun 09, 2009 at 15:57
Thanks John, i will probably go down that track, just got to get my A into gear.

cheers, Lance
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Follow Up By: Member - Roachie (SA) - Tuesday, Jun 09, 2009 at 16:28

Tuesday, Jun 09, 2009 at 16:28
Can I please just clarify something?

You've mentioned a couple of times that you have "OME" shocks. This is generally meant to stand for "Old Man Emu"..... or in other words , an aftermarket shock absorber of better quality but with the same dimensions as regards length of travel etc.

On the other hand, the tone of your question makes me think you might actually be meaning to say "OEM" meaning "Original Equipment Manufacture"... or in other words the standard shocks that Mr Nissan put on the beast at the factory.

In any case, as a rule of thumb, you should match the shocks with the springs. The shocks are responsible for controlling the vehicle's stability etc...... a much more important function than that of the springs; which is just to keep the sprung body etc from sitting on the bump stops.... hahaha.....

So, pick your springs (to cater for the weight etc), then match the shocks to the springs.

Roachie
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Follow Up By: Member - Lance S (VIC) - Tuesday, Jun 09, 2009 at 16:43

Tuesday, Jun 09, 2009 at 16:43
G'day Roachie,

I replaced my original shocks not long after i bought it and replaced them with Old Man Emu Nitro chargers, the springs in weight that i have picked are 0-250kg. I am in a delima with the shocks as what shocks because i only load up the back when going away, so 85% of the time there is nothing in the back. Its whether i should go the ironman nitro gas or the foam cells, but that is a harder shock going from reports. I have about 70kg on the roof, close to 150kg in the back plus towing the tambo.

Pick a shock is like picking a tyre, fridge etc, i would of thought it would be a little easier.

cheers,

Lance
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