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Hilux Leaves, SPUA - Anyone done it?

Tech Talk for Suzuki owners.

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Hilux Leaves, SPUA - Anyone done it?

Post by alien »

Hey guys, been watching here for yonks and finally decided to join in the fun =)

I'm in the process of getting a permit to run lifted hilux front leaf springs all round on my '92 zuk... we will be grinding off and putting on new perches all round, shackle reversal on the front end, move springs and shocks inboard to the chassis by about 2" etc etc...

Has anyone else tried this before? if so, any handy hints?

And no i dont want to go SPOA =) i reckon i can get about 4-5" spring lift outa this setup - and i refuse to do a body lift... SPOA will come later down the track by chucking hilux diffs under it. But thats a long way off for now!

Its basically the aussie YJ conversion using a much more affordable and available spring, which is about the same length and width.
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Post by Barathrum »

i have hilux springs all round SPOA, ground off all the old perches, extended chassis at the front, front is shackle reversal. the only thing will the front springs that i may change is the position of the shackle hanger, it currently sits below the chassis rail, if i was going do it again i'd probally make the hanger go through the chassis rail. so that i could run a slightly longer shackle and make the springs sit a little lower than what they are. The springs are in backwards so that the offset center pin is more towards the rear, this gave me a slight wheelbase extention.
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Post by Barathrum »

oh yeah i started with a narrow track zook, so i ran the springs in a similar position, directly under the chassis rails. so in your case it would be just like inboarding a wide track.
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Post by -Mick- »

This is a good idea afaik alien. I'm hoping to do likewise but probably with a kit from the US to make it all bolt on.

The only reason for this is ease of returning to stock for when (not if) the QLD powers that be wag their finger at me :lol: May cost more initially but I see it being worthwhile.

I'll be running them on a nt lwb and aiming for 2" lift only so they'll be flat and flexy. Not sure if you'll need any steering or driveshaft changes though.
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Post by alien »

yeah steering will be extended (cut, tube, weld), brakelines extended, front driveshaft will use a CV joint, rear we dont know yet but likely to use a spacer, depends on how much we get it to flex! =)

Barathrum - you get a good lift from this? (minus the SPOA). we will likely use 2" lifted hilux springs all round and gain extra lift from the perches. The springs are also going to be re-set by a suspension place to make sure the rate is correct for the zuk's light weight.

How does it flex? got any pics of what i can expect?

Im hoping to get a minimum of being able to sit my front up on a 33" tyre with the back still on the ground firmly - am i dreaming?
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Post by nicbeer »

Sounds good , CV front driveshaft (interested)

Have you found out if you need a swerve test?? Whats it costing ya.

Who's doing this for you?

cheers

cheers
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Post by mud4b »

about time you joined slacker.....


did you say you were going to cut/join the steering? :roll:
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Post by alien »

at this stage im still waiting in DPI to get back to me about whether they'll even let me do it legally... swerve test seems generally required when a bodylift is done as it increases body roll... im pretty much taking the stock hilux setup and sticking it under my zuk minus the SPOA - so im not sure if i have to do the everso biased swerve test at this stage.

The guy doing it is a secret until its done, as he is flat out and doesnt want any inquiries at this stage =P

And Mark - yeh, cut it, sleeve around it, weld it up and get the welds checked... its so cheap its almost free - and itll work =)

Shocks are still an unknown factor - will be determined by the articulation and final lift. all we know is the mounts are comin' off and being moved - just dunno where to! =)

Cost is gonna be about $1500-2000... but its mates rates
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Post by redzook »

i dont think ur approach angle will be any good

but other then that sounds good
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Post by DeWsE »

redzook wrote:i dont think ur approach angle will be any good

but other then that sounds good


I found that out the hard way. I nailed my shackles on every thing, which might not have happened if I went SPOA.
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Post by redzook »

DeWsE wrote:
redzook wrote:i dont think ur approach angle will be any good

but other then that sounds good


I found that out the hard way. I nailed my shackles on every thing, which might not have happened if I went SPOA.


yeh the hilux front are another 2.5 inch worse aswell :lol:


if you do the sr well u should be able to help it a little buy making the mounts slider friendly and lifting them up a bit higher
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Post by Barathrum »

alien wrote:
Barathrum - you get a good lift from this? (minus the SPOA). we will likely use 2" lifted hilux springs all round and gain extra lift from the perches. The springs are also going to be re-set by a suspension place to make sure the rate is correct for the zuk's light weight.

How does it flex? got any pics of what i can expect?



i'm using a stock set of hilux springs that came out of a lux that got a lifted set of springs put in, so my lux springs are about as flat as i can get. very little lift in the springs. I'm running less springs in the pack to keep it flat.

heres a flex shot. it still needs a little more sorting out but you get the idea.
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Post by alien »

thats some great flex! im impressed!

2" lifted lux springs are longer than standard by a tad, so hopefully i can score that much flex with mine.

Yeah the approach angle shouldnt be too bad, no worse than the stock angle as im going higher and bigger rubber, and it will be angled in such a way that anything that hits it get deflected downwards under the spring.

Im hoping that a 2" lux spring under the zuk should give around 3" over stock zuk height and the hangers will give it the extra 1" and i can use stock lux shackles cos theyre nice and small (hence out of the way)
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Post by Barathrum »

the rear flex's really well as it is only two leaves. but the front doesn't seem to be that good yet. but that could of just been the way it was lifted up.
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Post by alien »

so if there was anything you'd do again, what would it be?
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Post by Wolverine »

Dude sounds like a great idea.

Basically you are putting in longer springs for better travel etc.
This means you will have to increase distance between the spring hangers to fit the springs..

So chassis extend the front and rear. If done properly it actually looks pretty good and dosent stand out too much. Check out Red zooks latest build up. Looks shmick!! and wont cost you much to do either.

If you don't want to increase your wheelbase too much and keep everything close to stock then just move the hanger eaqually forward and rearwards half the distance of the increase in spring length. ie if your spring is 8 inches longer than if you moved each mount outward 4 inches everything would stay in the same place.

This saves any dramas with drive shaft lengths, bumpstop and shock location, and steering but like Redzook said your approach angle will be a bit worse. This can be fixed by moving the centrepin location on the spring forward abit to move the diff forward. But dont go to far unless you are going to change your steering ie cross over otherwise you will get binding.

Obviously if you want to increas your wheelbase you can move the diffs out but there will be ab bit more grinding and moving of things.

Also with the springs dont bother getting them reset. Find a nice cheap pair of stockers and put them straight in. You will still get a fair bit of lift out of them anyway due to the length. If you are going both hilux rears at the front and at the back then you might have to make a slightly longer shackle for the rear to level it all out. No dramas as it increases travle and dosent mess around with steering at the back!!!

Also remmebr that the hilux springs are wider than the zuk ones so you will have to make new hangers. You cant just move them.

Is well worth it. Will give you heaps of flex.

Clear as mud!!

I am doing something similar at the mo but with the hilux diffs.
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Post by alien »

Where about in perth are you? Im North of river, near warwick.

Everything you mentioned is stuff i knew, but yeh just seeing if i can get any do's and do not's on the mod =P The springs i'll be putting in wont be re-set theyll be a new pair of hilux springs - its just the old standard that you can only buy 2" lifted ones (50mm).

How are you going to build your spring packs?
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Post by Wolverine »

Yaeh dude I am up near Joondalup. there is a couple of us up this way. You should pop up one day and say hello.

With the spring packs do you mean how many springs. If so I will be running three. But before you by the springs you may want to have a search through the hilux forum for alternative springs they use.

Some have used mazda springs which you could pick up from a wreckers really cheap. I priced some IFS rears yesterday from wanneroo 4x4 which were 85 bucks each. With a bit of reasearch you could save a bit on your springs. It all depends on how long you want to go. Obviously the longer the more flex but the more work required.

Another idea is cj 7, wagoneer or chevy springs. Hard to find sometimes but they are long, soft and heaps flexy. they are also only 2inches wide so they fit directly into zuk hangers, spring perchesetc, you just have to cut the hangers and move them. I ran them on my car for a while and it flexed heaps.

But my rig is now a dedicated offroad pig so i am going for the longest springs i can find. I will be extending the chassis front by approx 200mm and the rear by about 300mm. It will have cross over stearring aswell.

I also have a made up inboarded shock mount if you want to have a look at it and see the design.
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Post by alien »

wolverine - can you show me how your shock mount will work? id be very keen to see that =)

What shocks you reckon youll use?

we found that 60 series landcruiser stock shockies have all the travel and compression we need - just the valving needs attention... what did you have in mind?
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Post by Wolverine »

No worries i just have to charge up the camera batts.
Its basically an inboarded setup with a re-enforced mount.

My new zuk does not have an arse end anymore so the shocks will probably be monuted to the cage or on hoops.

With shocks, what ever you can find that suits what you want. I will have to measure up how much the new one flexes and then find a shock to suit.

I had some commodore shocks on it before. They have heaps of travel!!!!
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Post by alien »

got my leaves today... flat ones, brand new from malaysia!

Theres a toyota 4x4 place in welshpool that did them for $90 a pack ($360 total)... not bad when WA Suspensions wanted $416 a pair ($832) for either flat or 2" lifted!!!

also ordered my calmini 5.14 tcase gears - $1080

tis all happening!

Oh measurements on springs: front 2" lifted zuk spring = 900mm, rear 2" lifted zuk spring = 1000mm, front lux springs = 1120mm (this is straight line eye-to-eye... zuk springs on the zuk, lux ones on the driveway - so the lux ones are likely longer under the weight... but its an idea on the size increase!

now just need to measure and laser cut perches and we are set to go. should be starting the build in mid-late july due to my mech. tech guy going on holidays soon =)
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Post by ljxtreem »

easy way to fix approch angle, FIT BIGGER TYRES :D

I Got MQ front springs allround SPUA

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Post by Gwagensteve »

hey Mock, post a photo of joshos old car. SPUA/hilux all round.
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Post by christover1 »

josh's old zook
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Post by cbr »

alien wrote:at this stage im still waiting in DPI to get back to me about whether they'll even let me do it legally... swerve test seems generally required when a bodylift is done as it increases body roll... im pretty much taking the stock hilux setup and sticking it under my zuk minus the SPOA - so im not sure if i have to do the everso biased swerve test at this stage.

The guy doing it is a secret until its done, as he is flat out and doesnt want any inquiries at this stage =P

And Mark - yeh, cut it, sleeve around it, weld it up and get the welds checked... its so cheap its almost free - and itll work =)

Shocks are still an unknown factor - will be determined by the articulation and final lift. all we know is the mounts are comin' off and being moved - just dunno where to! =)

Cost is gonna be about $1500-2000... but its mates rates


If you increase the overall height more than 50mm then you will need to do a lane change test. It does not matter how the lift is done (tyres, suspension or Body lift) if the combination causes it to be more than 50mm above standard then it will need to do a lane change test.

If you are putting hilux springs and this makes the zuk 50mm above standard and then you run 31" tyres this will mean the overall lift is above 50mm and therefore a lane chnage test is required.

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Post by SiKiD_01 »

Chris, (and whoever else may know)

what are the specs of josh's sierra with hilux spua? it doesnt seem like he's done a chassis extension at the front, and i can see on the rear he's used a buggy 3/4 set up.

did he move the front rear mouts back to adjust for the length of the leaf? and i suppose the rear front mount was left as is due to using buggy set up.

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Post by -Mick- »

christover1 wrote:josh's old zook


that's pretty insane flex :cool: is he online at all :?: I'd like to pick his brain on that.

Maybe someone could post some more info on it if they know.

Alien how is your spring swap coming :?:
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Post by christover1 »

Mock (ljxtreme) helped build/butcher it :)
Pick his brain.
Make sure he has it switched on first, tho.
I'll wack up some mor pix
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Post by christover1 »

I think gwagen steve knows more info, I only seen it on the 1 trip.
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Post by christover1 »

more
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