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93 Mu leaf spring questions!

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Re: 93 Mu leaf spring questions!

Postby geeves » Mon Aug 03, 2015 5:33 pm

before you cut the spring be aware of the following
LTSA rules on modified vehicles are very definate on this. Cut suspension or steering parts are forbodden End of story. Reason is that heat damages the intended temper in the metal and even a grinder produces a lot of heat. You could try and convince your wof guy that it was cut with a hacksaw but he is as likely to believe you as I am.
I would be taking a lot of measurements of those springs and getting terraquuip to compare to specification. Something here is really not right
Masurements that matter will be
total spring length measured around the outside of the curve eye center to eye center
straight line eye to eye
hight of arch to inside of spring
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 isuzurob » Tue Aug 04, 2015 12:46 pm

yes the rules do say that, but id rather have cut springs than a chewed up chassis like what happened in my bighorn with lovell lifted springs, if you cut and paint them and make both sides the same no one will know
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Tue Aug 04, 2015 2:39 pm

Valid point Geeves, on the other hand I would like to actually get these in without going through the process of convincing the guys at terraquip that these require replacement and hope that the next pair are better shaped- then hope that there actually is enough room in the trucks front mount to fit the second leaf! Also I would rather cut this leaf down slightly than cut the trucks mount.
At the end of the day, leaf springs are not that uniform so if it is a tidy job with some paint to match the rest I am confident that you would not suspect any cutting had been performed- well except you Geeves who now knows otherwise.
Chop chop, get to it!
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Re: 93 Mu leaf spring questions!

Postby geeves » Tue Aug 04, 2015 2:48 pm

sent you a pm Might have to have a closer look tonight
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 geeves » Tue Aug 04, 2015 2:52 pm

The Lovells I had only had the military wrap at the back
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 » Tue Aug 04, 2015 3:09 pm

Well then, these will be only slighty different to those!
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Rear: 2" lifted leaf springs
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Re: 93 Mu leaf spring questions!

Postby isuzurob » Tue Aug 04, 2015 4:23 pm

mine were the same as yours but the second leaf was closer to the eye but still hit the mount, i cut mine with no bad effects so far, truck is in auckland now and had lots of vtnz wofs
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Tue Aug 04, 2015 7:16 pm

Cheers Rob, looking into how stiff these will be once they are in now- also going to get the warrantee with the additional writing that says the manufacturer is ok with cutting them and the warrenty is still valid.
Ill get this before I do anything to them.
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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 » Wed Aug 05, 2015 3:54 pm

Ive been thinking
We suggested using a wedge or block at the front to try and line up the spring but thinking about this it would be easier at the back. You could use a bigger block and have the flexibility of the shackle
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 » Wed Aug 05, 2015 4:47 pm

Thats a good point, payday tomorrow so Ill be looking to get it sorted this weekend! One way or another im going to get these in and see how they perform!
Only catch is I need to get a new pair of shackles- my current ones are pitted pretty badly- any places in Wellington that might have ones to suit the Mu?
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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 isuzurob » Wed Aug 05, 2015 5:27 pm

mu rodeo and bighorn and hilux are all the same shackles but different lengths
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Re: 93 Mu leaf spring questions!

Postby geeves » Thu Aug 06, 2015 10:59 am

Might have to do a ring round to see who has stock. best chance of stock is BNT, Autoline ,SAS, hutt city auto parts, repco ,supercheap
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 Aug 15, 2015 2:17 pm

Is this shackle almost inverted becouse the leafs are too short or the spring needs weight on it to bring it into correct position- my other factory leaf has the shackle pointer vertical with the tyre and weight on it...
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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 nb422 » Sat Aug 15, 2015 2:26 pm

Thatll just invert as soon as you put weight on it?
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Sat Aug 15, 2015 2:48 pm

Also, not sure this is normal...
Last edited by SamMu93 on Sat Aug 15, 2015 7:11 pm, edited 1 time in total.
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 SamMu93 » Sat Aug 15, 2015 2:50 pm

Leaf and diff dont line up- bent leafs? Think i will be able to press them into place tho.
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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 nb422 » Sat Aug 15, 2015 2:53 pm

Fully unloaded the shackle should be dead vertical or maybe a couple degrees back. Not that far back as it is in the pic. I wouldnt bother trying to make them work anymore than you have as they are obviously the wrong spring unfortunately
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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 SamMu93 » Sat Aug 15, 2015 4:50 pm

Epic, now that the springs are off I can see that the Ironman ones are approx 80mm shorter than the stock ones.
Well that was a fun few hours of discovery.
SamMu93
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Posts: 148
Joined: Sun Jan 18, 2015 3:22 pm
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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 » Sun Aug 16, 2015 7:57 am

Didnt you measure the inner spring by laying a string on it at the start of this exercise and find the straight length the same? I was sure we were just looking at too much arch.
Either way at this point those springs have to go back. You could put a crowbar on the shackle as you lower it to force to go back but first time you lift a wheel it will invert again unless those springs sag the first 30 mm in the first drive round the block.
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 » Sun Aug 16, 2015 2:38 pm

Yes but I have since discovered that even though both pairs are the same length with different arch angles, when you get a lifted pair they will have to be longer so that when they are resting they measure the same if you measured a level line from one pair eye to eye vs the new pair eye to eye. Does that make sence? You can look at the pictures to see the result of 2different pairs that are the same length (with a peace of string) but not the same length if you were to measure a level line from eye to eye.
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

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