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93 Mu leaf spring questions!

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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Sun Aug 16, 2015 2:42 pm

I have emailed 4wdstuff.co.nz as they advertise a pair labelled "036-HOL101H" as the leaf to suit the Mu. Not this "HOLD004C" that Ironman sent me.
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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 » Sun Aug 16, 2015 5:45 pm

they are short, as i said when i reset my factory leaves 3 inches they were short and sometimes invert, got a cert with them in though, evryones part numbers are different, most people only have listings for tf rodeo which are almost the same
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Tue Aug 18, 2015 5:13 pm

isuzurob wrote:they are short, as i said when i reset my factory leaves 3 inches they were short and sometimes invert, got a cert with them in though, evryones part numbers are different, most people only have listings for tf rodeo which are almost the same


Why did you need to cert your springs? Ironman want to try them in my truck so they are going to fit them- if they dont fit they will refund me. They say that the leafs need to sag and get a new memory in them after having some weight on them for a while.
Im interested to see the result and have nothing to loose if they work staight away- will be testing them after the truck has been sitting for a day to see if I can invert the shackle at all.
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 isuzurob » Tue Aug 18, 2015 5:50 pm

had to cert as only aloud 2 inch lift without cert, i had 3 inch plus a list of other modifications, mine took about 6 months to sag enough so shackle was straight but still inverted when the wheels come off the ground, i just carried a cut down torsion bar to flip them back over
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Re: 93 Mu leaf spring questions!

Postby geeves » Tue Aug 18, 2015 5:58 pm

Is it a hard landing on inverted springs?
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 18, 2015 6:55 pm

on the drivers side it hit the fuel tank gaurd only inverted on passenger side, na it was ok only down part was truck sat uneven and wasnt nice to drive, also you lose alot of travel the more you bend the springs, old flat leaves flex the best
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Re: 93 Mu leaf spring questions!

Postby SamMu93 » Thu Aug 20, 2015 3:16 pm

Got to the Wellington Ironman dealer just after work today and bad news- the springs arnt right for the truck...
The shackle inverted and I was told they needed to be longer overall to reduce the shackle angle when the spring is fully extended.
So Im on the hunt again for a suitable lift option thats around 2". Might just look at a body lift and get that certed...
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 » Fri Aug 21, 2015 10:37 pm

Spring over on standard leafs is worth it imo, especially if going to get it certed for a body lift anyway. Mine has 2 inch body as well as a spring over and cranked torsion to sorta level it out. Was easy as to cert too.
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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 » Sat Aug 22, 2015 7:49 am

In Wellington Ken McAdams is the major certifier for 4wds. I know he is wary of spring overs
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 22, 2015 12:32 pm

nb422 wrote:Spring over on standard leafs is worth it imo, especially if going to get it certed for a body lift anyway. Mine has 2 inch body as well as a spring over and cranked torsion to sorta level it out. Was easy as to cert too.


Had a look at that as an option- looks like it would raise it over 100mm! Apart from certifiers not liking it, I think the front would end up rock solid by the time I wound the torsion bars up enough to match it. Top ball joints would not only need to be shifted to under their mount but would need a spacer aswell.
I have had some luck finding a pair of dobinson leaf springs to suit my ucs55dw chassis- they have to come from australia but I should have them in 4weeks!
At this point I am no longer in a hurry to get them- as long as the next pair are correct for my Mu!
SamMu93
Isuzu Junior
 
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 Aug 22, 2015 1:15 pm

Raises 75mm, mines fully certified for it. Most certifiers were ok with it, only 1 of 6 i spoke to said no. Front is 45mm lower than rear with decent travel still. Did balljoint flip, no spacer required. Official measurments on the plate are rear670mm front625mm.
Dobinsons springs are good, how much lift are they?
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Vehicle: 1993 Isuzu MU 4jb1 EGR Blocked, Free flow exhaust, 33x12.5 Mudstars on 15x10s. 32x10.5r16 on 15x8 -44.
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 22, 2015 1:47 pm

nb422 wrote:Raises 75mm, mines fully certified for it. Most certifiers were ok with it, only 1 of 6 i spoke to said no. Front is 45mm lower than rear with decent travel still. Did balljoint flip, no spacer required. Official measurments on the plate are rear670mm front625mm.
Dobinsons springs are good, how much lift are they?


Thats interesting- how hard is the ride in the front?
Are the leafs the same softness with them above diff as under the diff?
Dobinsons will cost me about $500 - will also get u-bolts, bushes and shackles.
SamMu93
Isuzu Junior
 
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 Aug 22, 2015 1:51 pm

Pretty decent ride still, certainly not bad
nb422
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Posts: 217
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Country: New Zealand
City: Hamilton
Vehicle: 1993 Isuzu MU 4jb1 EGR Blocked, Free flow exhaust, 33x12.5 Mudstars on 15x10s. 32x10.5r16 on 15x8 -44.
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 » Sat Aug 22, 2015 3:12 pm

The big issue with spring over is spring hop and windup
670 is a serious lift. I hot 570 on the bighorn at the rear and wouldnt take the front past 510. 670 I would have to park on the lawn
Sanding your knuckles before starting work can help. That way you cant skin them
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2013 Subaru XV

Re: 93 Mu leaf spring questions!

Postby nb422 » Sat Aug 22, 2015 3:17 pm

Removable anyi tramp bar is easy. Certifier was happy with that too
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Posts: 217
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Vehicle: 1993 Isuzu MU 4jb1 EGR Blocked, Free flow exhaust, 33x12.5 Mudstars on 15x10s. 32x10.5r16 on 15x8 -44.
Spring over axle, winch bar, 50mm bodylift, balljoint flip. Exo cage soon to come. Fully certified even.

Re: 93 Mu leaf spring questions!

Postby isuzurob » Sat Aug 22, 2015 4:40 pm

my 2.8 swb bighorn is 630mm all round with home make springs and a 50mm body lift, drives better than when it was factory, those springs sound like a good deal
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