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93 Mu leaf spring questions!

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93 Mu leaf spring questions!

Postby SamMu93 » Thu Jun 11, 2015 7:29 pm

Right, now that Ive got the power I want out of this 2.8L Mu I think its time to jack it up somewhat (also the rear has sagged like an old ladies boobs... Not nice).
Ive been looking at my lifting options - body lift, extended shackles and new leaf springs- I think im keen on new leaf springs. As I understand I can get away with a 2inch lift (which will be more due to the origionals sagging) without needing a cert- correct?
Is that the max without a cert?
Also I have been on the hunt for suppliers and prices but looks like I will have to ring around as all I have found on the net is this: http://old.4wdstuff.co.nz/node/45
Anyone know where I can get the best price on a pair?
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SamMu93
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Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby geeves » Fri Jun 12, 2015 7:08 am

that part number should still match something 036-HOL101H
4x4bits are quite competitive nowdays but try the other local auto stores Repco used to sell Maxtrac brand springs
The current rules dont state a height for a suspension lift but do say the springs must of been designed for that vehicle. Mechanic isnt even going to look at them to see what they are at 50mm or less. Shackle lift and body lift will always require cert. There were moves afoot to change the rules to where the wof guy could ok any lift up to a total of 100mm but above that couldnt even be certed ( at the time NZ4WD assoc were trying to arrange an excemption card system) but Im not sure where that ended Hopefully the too hard basket. 100mm does sound a lot but factory tyres are 29 inch so 33s mean 50mm then springs of 50mm and forget a body lift
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Fri Jun 12, 2015 3:04 pm

Thanks for that Geeves- emailed 4wdbits who promptly got back to me with the following:

"We have some new springs which will be test fitted to a MU in the next week
or so. All going well they will be available in a couple of weeks.
The springs will be $516 for the pair, freight to Wellington $11.50."

So that sounds pretty good- will be checking repco soon aswell.
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
Age: 29
Country: New Zealand
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Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby geeves » Fri Jun 12, 2015 6:19 pm

when you do you may be offered 2 options. Do not select the heavy duty option. They fit but too stiff for a Mu
Try SAS Auto parts and Hutt City Auto Parts as well
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby turnturn » Fri Jun 12, 2015 7:21 pm

Geeves, standard tyres for a 4JB1-T Mu are 31".
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Fri Jun 12, 2015 7:38 pm

geeves wrote:when you do you may be offered 2 options. Do not select the heavy duty option. They fit but too stiff for a Mu
Try SAS Auto parts and Hutt City Auto Parts as well


Will do Geeves, called repco and supercheap- they both have to get back to me on monday.
I have 31' tyres on it at the moment as a side note. I hope the new set are a bit stiffer- the current ones sit 1/2 into the travel before you even get moving! I also hit the rear bumpstops on a daily basis- not trying either.
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
Age: 29
Country: New Zealand
City: Wellington
Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby geeves » Sat Jun 13, 2015 7:22 am

Intriguingly I had a set of Lovells springs from a car place in Petone that delt more with the race car crowd Cant remember there name It was Total something I think. They were the heavy duty type which was perfect in a bighorn Lifted the back 80mm Put a known load in the back and it hardly dropped compared to the old springs but even empty it would still polish the bump stops going over the rimitukas. Often upset v8 comadoors going up there though by staying with them. Couldnt hold them down the other side though.
If you can find an agent for Lovells buy them They were stiff when they needed to be and had all the flex in the world
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby blairreed » Thu Jun 18, 2015 8:13 pm

Hey man just chucking a few ideas out there my 93 mu has 2" extended leafs with a few extra springs added to the pack this will raise it up to stock again and get you more flex wound up front torsion bars and extended shocks all round test fitted some 33s and jacked up the wheels to full flex didn't seem to have any rubbing problems :D
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Re: 93 Mu leaf spring questions!

Postby geeves » Fri Jun 19, 2015 2:32 pm

Just adding leaves to a spring reduces flex. 2 inch lift though should clear 33s. The Lovels I had worked well with 5 leaves because each leaf was 2/3 the thickness of a standard leaf.
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Sat Jun 20, 2015 4:56 pm

Still trying to hunt down a pair- so far I have found 2 places that can supply them ironman and 4x4bits
Heres the prices from Ironman...:

We have two types of rear spring for the MU they are a heavy duty and extra heavy duty the cost is

1. Heavy duty $233.75+gst each
2. Extra heavy duty $261.25+gst each
3. Ubolts $33.00+gst per pair
4. Bush kit $82.50+gst
I have also included the prices for the bushes and ubolts as we find the original ubolts are usually to short and the bushes are worn.
SamMu93
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Posts: 148
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Age: 29
Country: New Zealand
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Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby SamMu93 » Sat Jun 20, 2015 5:02 pm

Looks like it will end up costing quite alot when you add up the total of all this:
Leaf springs
Ubolts
Bushes
Installation labour
Labour to wind up torsions and flip balljoints
Cost of a wheel allignment

By my estimate you would be looking at $800- $950 all up
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
Age: 29
Country: New Zealand
City: Wellington
Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby nb422 » Sat Jun 20, 2015 9:17 pm

Spring over, body lift, and cert. Easy ;-)
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Spring over axle, winch bar, 50mm bodylift, balljoint flip. Exo cage soon to come. Fully certified even.

Re: 93 Mu leaf spring questions!

Postby geeves » Sun Jun 21, 2015 7:15 am

options 1,3and 4 sound good You dont want opt 2 in a Mu. It would be wise to add greasable shackles and pins to that kit of you will be hounded by squeaking bushes for ever more.
Labour should be no more than personal garage time. Do the rear springs in a morning spray the front adjusters with your favorite penetrating oil Have lunch Do something elese for the afternoon. Following day spray the adjusters again lift one side flip the joint wind the adjuster up about 2 turns Drop it lift the other side do the same but also take the linkage off the roll bar Take it for a drive round the block then final spring adjustments.
As for spring over Did it actually pass?
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby nb422 » Sun Jun 21, 2015 7:26 pm

Went over it with certifier and he was happy with it as long as welds were good. Official cert inspection is tomorrow morning so will let you know.
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Spring over axle, winch bar, 50mm bodylift, balljoint flip. Exo cage soon to come. Fully certified even.

Re: 93 Mu leaf spring questions!

Postby geeves » Mon Jun 22, 2015 3:29 pm

You have a separate thread on this. Can you publish the suspension measurements once its certed. It could make usefull info across the 4wd scene in the future
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Mon Jun 22, 2015 5:36 pm

Not sure if Ill go with ironman springs as I recieved an email today saying they would raise it 40mm and cost $760 all up.
Seems abit steep but once I get a quote from my local Ill decide.

Ironman:
This gives you a 40mm lift (from new). If you went for our ‘Performance’ leaf springs, they have a capacity for 0 – 300kg additional weight. They should be fine for your vehicle. The constant load leafs have a capacity of 300kg up to GVM and they would ride hard if you didn’t have constant weight in the back. So, if we went the Performance Leafs 2 @ $233.75 + GST each, the UBolt kit 2 @ $33.00 + GST each, the bush kit @$82.50 + GST and freight @ $45.00 + GST the total will be $661.00 + GST of $99.15 = $760.15 GST Inc.
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
Age: 29
Country: New Zealand
City: Wellington
Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby geeves » Mon Jun 22, 2015 5:54 pm

Time to pick up a phone book and ring all the wellington parts suppliers. ie repco bnt sas hut city auto parts autoline etc
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Mon Jun 22, 2015 7:06 pm

Yeah, tried supercheap, hutt city autoparts, repco, 4wdBits, SAS... Time to put down the phone book...
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
Age: 29
Country: New Zealand
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Vehicle: 93 Isuzu Mu 2.8 TD
Rodeo 3" dump pipe off turbo
2.5" Exhaust to tip
Bighorn intercooler
Tweaked fuel pump
Boost tap (15psi)
Egt monitor installed
Rear: 2" lifted leaf springs
Front: Wound torsion bars, dropped front diff, flipped ball joints, cut upper bump stop

Re: 93 Mu leaf spring questions!

Postby slightlydodgy » Tue Jun 23, 2015 5:36 am

Would be 7 or 8 years ago but bnt did me a hd set for my rodeo for $450 They were 50mm lift over standard
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Re: 93 Mu leaf spring questions!

Postby isuzurob » Tue Jun 23, 2015 6:09 pm

lovells still make them i payed 950 for a set of 50mm raised and have had them reset twice in 1 year they keep sagging, just get your original leaves reset 50mm, it cost 350 for both leaves i got some reset 75mm for my LWB 89 bighorn and they still flex very well
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