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Need Longer and Flatter Springs for lux.

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

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Need Longer and Flatter Springs for lux.

Post by The Missing Link »

Converting the rear of my Hilux to have the spring hung under the diff as opposed to over it. The car is a 1990 single cab(FYI).

What I am looking for is a spring that is Longer, the spring rate Won't matter so much. but mainly need something the will fit into the Pin local at the front.

Any suggestions and specs welcome, Also anyone having done a similar conversion, would be grateful to pic your brain.

Dan. :)
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Post by dans-paj92 »

you do realise you will lose 3-4inches of lift in the back if you do this?
'84 4Runner, 2.4TD, 12psi Boost, 4" Suspension, 2" Body, 4.88's, 35's, Narva Spotties, Winch, Power Steering, MTX Sub, Racing Seats, Front Auto Lokka, Crawler Gears
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Post by crankycruiser »

umm this is probably a stupid question...... but why!?
80 xtra cab
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Post by SIMMO84 »

:rofl: :popcorn:
Wtb, 105 series rear tyre carrier, alloys and tyres.
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Post by craz3d »

Obvious troll is obvious.
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Post by sprungupcruiser »

I was thinking about converting my solid front axle hilux to IFS.... how hard is that? has anyone done it? :roll:
Braden Tagg of XRO Racing is scum and not to be dealt with. See here http://www.outerlimits4x4.com/viewtopic.php?f=10&t=223295

bj73 build up thread http://www.outerlimits4x4.com/ftopic168809.php
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Post by yamaha__308 »

I used the rear leaves out of the new coil front hilux and they're about 3" longer in the front section of the spring.

Also check this link out from the states, he's going spring under front and rear:

http://www.pirate4x4.com/forum/showthread.php?t=850566
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Post by The Missing Link »

Lower Cg. lowering the rear does not overly worry me, hoping to make a steadier ride. More curious about the idea than anything. lotta rodders have done it to their rides. Will be keeping the old system inplace to change between them.
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Post by berad »

I can see the question is valid, although i think you need to answer and research alot of questions yourself, before asking such a vague question with IMO wrong info in it.

Are you serious, so your going to cut the guards/firewall, tub the tray or have the tray ridiculously lifted, i take it this will be an offroad only truck or driving a given truck on road with cut up bodywork to deal with upward travel after losing MORE than 3inchs of lift over standard, absolutely everything will be thrown out of wack.

I'm all for a lower COG, but it doesn't sound like you know what your talking about, i think you'll find the spring rate HAS ALOT to do with articulation and has alot to do with the reasoning behind going spring under as does spring length, bump stops, pin location, some basic measurements would make it seem like you have half thought about it before posting.

What is the purpose of the truck.

If your going spring under you would use longer springs and a different located pin to move the diff into a more useful position, to aid STABILITY off road. (most likely anyway)


What the farrk does a rodder have to do with 4x4's and stability, i think you'll find most "rodders" and just about any non 4x4 vehicle is spring under. (although spring under has been done before)

Why are you looking for a better COG, than can be achieved without spring under and the problems that come with it.

What under body armour do you plan on using to stop the underside of the truck being ripped to pieces from the 2wd like ground clearance.

What options have you looked into other than going spring under to achieve a better "COG"

What are you going to do to the front to match ride height.

Why would you want to keep the old system to change between them

What mods have you got to show that it is unstable, i'd class mine as very stable and is not spring under, a low COG brings more than a new set of any spring rate leaves and some new bush's, what about track widths, ride heights achievable with spring over, spring rate, shock setups, shackle selection, shackle angle, weight distribution, wheel offset, and a million other variables.

I have plenty more questions.

If it is a troll, i bit, but the question is not as stupid as some may think, there is just alot more to it than a set of springs
Last edited by berad on Sat Mar 20, 2010 2:12 pm, edited 1 time in total.
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Post by Narrowscopeofreality »

Yeah. So chomp on that. :D :lol:
'96 Lux - DD
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Post by The Missing Link »

To Berad.
cheers for the thought and time you put into your post. to answer a few things you mentioned.

One> this is the beginning of my research.
I thought I could ask a simple question and get some interest in it by Posting What I am researching. My wording seems to be not as precise as it should have been.

Two. Just because Rodders and 4x4's are designed and driven completely different does not mean that the principles and techniques they have in place are worthless to our community. It's thought like yours that lead the nazi party to power in Germany a few years back.

Three. Yes off road mostly. prolly live the remainder of it's life on trailer to and from events. But I may convert it back for sale at a later date and or use.

as far as your other points go, I am and have done some research on other options, including coil overs, coil springs and different combination of springs and shackles ect. and am continuing that conversation/research via many pathways.

As an FYI. I have not started the build yet and will be making my choices for the suspension setup at a much later date.

So Flame someone else to feel good about yourself. DAREB


Oh by the way Narrowscopeofreality Can you Mouth? BAHHHHH!!! be a good sheep and pull the wool over your eyes.
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Post by berad »

I dont see the comparison between rodders and 4x4 as far as spring under goes, spring under is in alot of 4x4s and most 2wd's standard, and alot of rodders run 4 links.

What techniques could be adapted from rodders and spring under to be used in a 4x4, that commonsense and other applications don't tell you.
Its a pretty simple process IMO without bringing rodder style setups into the equation, cut the perchs off weld new ones onto the bottom of the axle tubes, then steering etc will have to be changed asto not hit the motor or lift the motor up etc etc and the list goes on.

I would compare it to a 40/60 series cruiser etc, as it is in a 4x4 format already, its proven to work rather than comparing a spring under hilux to a hotrod??? WTF.

I feel quiet good about myself without flaming anyone, and this is not a flaming just plain and simple facts, with a little bit of common sense thrown in to mix things up.

Once again what are your reasons for thinking about spring under, im not taking the piss, its a simple question. IMO a hilux with a set of flipped rims, ifs rear housing, ifs hubs and kept low on a set of 35s is as stable as you need it to be in most cases, running a track width like a patrol or wider and much lower....


Mine is no comp truck, so i dont have the comppp stattusssss, this will give you an idea of how low you want to go, mine is spring over, on a set of almost flat springs that are around 3inchs longer than standard front and rear, 35inch rubber and it doesn't scrub although to go 3inchs lower again you'll see how low it will be and what would be involved. When i put 31's back on it, it sits no higher than a stock hilux with non sagged stock suspension. I just can't see the justification for spring under on a truck that is originally spring over, stability yes but the con's far outweigh the COG bonus.

Image
Last edited by berad on Sat Mar 20, 2010 5:01 pm, edited 1 time in total.
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Post by Rory »

you just wouldnt understand Berad.....
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Post by berad »

I dont have the statussssssssss
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Post by Narrowscopeofreality »

Can I mouth? Bahhh!!? That fell about 10 feet short of making any sense whatsoever. I won't even bother explaining the meaning behind my comment, you seem to have missed it entirely. But well done with the purple highlight. *insert head patting smiley*
'96 Lux - DD
'79 BJ40 - Project
'81 BJ42 - Got the bug
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Post by The Missing Link »

No Narrow I got it. just bit useless is all. have something real to contribute please do.


the comparison between rodders and 4x4 is not really a comparison but more a reference. same as ill be looking at any of the motor sports to discern if they have any invitations i wish to use. I had not found much about any conversions done. now i have found a few and the work seems extensive on the front. And i have ruled out doing that to mine. But am still wondering if a conversion in the rear is viable. looking at more speed event than rock crawling tracks/comps.

and yes the machine i put together is probably going to have some pretty extensive under body Armour. rock sliders and bash plates of a custom design.
I am also looking at running different diffs. ie GQ/GU/80series, as well as you suggested a IFS rear diff and springs possibly.
I have heard your thoughts on the negatives and what you think to be worthless gains, taken them into account.
It seems that noone around here is prepared to consider the idea might work. So ill work it out myself. If it works ill let you all know. If it don't well. shit happens. ;p

P.S. I have no intention of reading any further posts in this topic. cheers for the info(useful or not).
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Post by Narrowscopeofreality »

I'll bet he checks it again :popcorn:
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Post by craz3d »

It would be less work to link it for a lower ride height.
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