4 inch coils on GQ LWB

[Screwy]

Hopeing to have a GQ LWB within the next 2 months or so.
Want to put 4 inch coils and 33's on it so my tow rig.

What Other mods have to be done to get away with a 4 inch lift?
Do i need to do castor for that sizes lift on a LWB?
lengthened brake lines and breathers?

cheers guys,

Screwy :D

[Andy N Di]

it really depends on the vehicle. I have a GQ wagon that ive lifted to 4in and am about to take to 6in. I havn't had to change anything apart from new diff breathers as the tube wasnt long enough but i have heard of others that have had to do the lot its just a trial and error thing .At least you can get the offset bushes now .

[blu125]

I have never found a GQ with a genuine 4" lift that has castor within spec (pos 1-3 degrees) with anything other than plates or dropped leading arm mounts.

Offset bushes that correct more than 2 degrees also limit articulation (and don't last very long).

[BIG GQ]

As Chris said, you will have to do a castor correction of some description. Any other mods such as extended brake lines, breathers, etc. well you will have to see once the lift is in but I would say that these will more than likely be required. A true 4" will be so close to needing these that you may as well do them. 4" is basicly the border line for mods like this.

Cheers
Linc

[Screwy]

so i might be better off with 3 inch coils and negelect all the other mods?

screwy

[MavTestPilot]

I only needed 2 degree offset bushes. Offset bushes use to last about 6 months before they were getting a bit dodgy.I also swapped back brakeline to front and got a new longer back one for peace of mind, because it was pulling pretty tight on full travel.

[bagsy]

ive got 3 inch springs ,and i went for the caster plates because i found that the bushes were ****.......
Youll find theres a big difference between what people call drivable, and what you think is good to drive...but every car is different.
i didnt need the brake lines extended, just undo the bracket from the diffs and make a longer bracket.
you might want to think about adjustable panhards too, because you will need a bit more lenth andthey are twice as strong as the originals .

[blu125]

The problem with castor correction bushes is that the leading arms rely on the ability of these bushes to flex to allow good articulation, and if the crush tube is no longer in the centre of the bush, it will contact the arm before the desired flex is obtained. A lot of Castor (or offset) bushes dont have the crush tube bonded to the bush so sideways movement as it twists will guaranty early failure.

Castor plates can be fabricated easily, (although I always use commercially available ones for customers trucks) and allow the front axle to work correctly.

There is also a good case for dropped rear mounts, but I haven't ever used them, even though I know that the geometry is better, because I think they are vulnerable to damage on rocks.

My 2c.

[boopa]

I'm wanting to do the same screwy....and have had two version of advice, probably split 50/50 from 6 or so 4by joints.
Half advise to go 2 or 3 inch coils and two inch body lift...others say go 4 inch straight out coils. First option of b/lift probably comes in at about 400 clams or so cheaper from waht I can tell?

I want to do move on this this week in view of a couple of trips soon......

what do you guys reckon......

oh yeh.....like everyone, I want great articulation and reasonable load carrying abilities...yeh I want it all 8)

cheers
Boopa

[Bartso]

your articulation is dictated by the length of your shocks body lifts are great for fitting larger tyres and keeping the centre of gravity down