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Post by powertruck on Apr 29, 2009 21:28:14 GMT 11
Just took my springs out tonight to get them reset as they had sagged very badly. The guy who is going to re-set them reccomended that i put a extra leaf spring to stiffen them up. He reckons that the early bighorns and jackaroo's already had the extra leaf but the Mu was one less. Does adding a extra leaf effect the articulation at all?
One other thing im lookin at upgrading my shocks does anyone know the Rancho part number for the MU? for the fronts and rears
Cheers
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jer0
Isuzu Junior
Posts: 63
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Post by jer0 on Apr 29, 2009 22:12:50 GMT 11
extra leaf springs do reduce your flex, there's no need for it unless your carrying heavy loads. The mu springs are nice and saggy for great flex.
Where are you getting them done?
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Post by jjcarenthusiast on Apr 30, 2009 1:10:18 GMT 11
it is recommended that if the leaf spring sags, change it and don't re-set or re-arch it. this is just a temporary solution as it might sag again over time. just my 2cents.
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Post by geeves on Apr 30, 2009 9:29:06 GMT 11
Jappanese steel cant be reset succsesfully They will be back to what they are now within 6 months. New springs are the way to go.There is a springmaker in CHCH with a good reputation but dont know its name. Otherwise look through the 4wd mags for a good brand. (Im happy with Lovels springs) Dont buy the heavy duty version.
The original bighorn springs were 3 main leaves and a short override. but my new springs (6 years old now) have 5 main leaves which are thinner and the second leaf formed into a partial military wrap. They give a 50mm lift but will still let the bump stops touch with an empty truck on a twisty road.
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Post by mulover on Apr 30, 2009 11:14:24 GMT 11
The maxitrac ones repco sell are not bad, about $500 a pair. I think its Chamberlin springs or something like that that does them, but you'll be looking at about $1000 i think for a new pair, they are very good at what they do, but are pricey. They would be the ones to see if you decide to reset your existing packs too.
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Post by powertruck on Apr 30, 2009 14:33:14 GMT 11
Bellamy and east are re-setting them for me the guy down there seems to know his stuff.
They are going to put an extra leaf in them and re-contour the shape of the spring. They reckon they have done heaps of the isuzu's and not had a problem with them.
I'll give it a go and see how i get on they charge $240.00 to reset them and put a extra leaf in
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Post by geeves on Apr 30, 2009 19:24:53 GMT 11
The extra leaf is meant to compensate for the tired steel in the old springs but can make things quite stiff. Nice on road but not so good in an axle twister
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Post by mudgrip4 on Apr 30, 2009 21:48:23 GMT 11
Take care Jarrad - the warnings above are right. We have had club nights on the articulation ramp here in chch and bellamy spring jobs w the extra leaf killed the axle travel that is essential for offroader, and particularly for the rear of the ifs isuzu. Have seen cruisers down to ramp index of 270 - not much more than a van - and a number of beam axle surfs little better.
The best bet is to retain old whippy flexible leafsprings so long as they are not flattened out, rather than put in new high arc rigid ones. You can retension old ones but as noted above it doesn't last long. Faced with this issue I put longer shackles on rear - gives extra height, ADDS articulation under the bumpstops and costs almost nothing. You can look at my truck setup if you wish
Mike.
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Post by turnturn on May 1, 2009 9:28:08 GMT 11
Rancho's part numbers for shocks that I bought for my Mu 5-6 years ago were -
Front RS 9214
Rear RS 9118
Current listings off Rancho site for the Mu are -
Front RS 999214
Rear RS 999008
While the specs for the fronts are the same between old and new part numbers I'm not sure the of reason for the change in the rear.
RS9118 were -
Compressed 14.25"
Extended 22.125"
Stroke 7.875"
RS 999008 are -
Compressed 13.875"
Extended 21.5"
Stroke 7.625"
I notice that RS 999118 are available and are the same spec as the RS 9118. From memory (and it is failing) I got the 118's because of the extra extension. It would probably pay to have a bit of a measure up and check that the longer compressed size is OK on your Mu. I'm pretty sure that the bump stop not the shock absorber is the limiting factor on my rear wheel compression.
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Post by powertruck on May 1, 2009 9:31:29 GMT 11
Thanks for all the input guys i pick them up today i'll let you know how i get on. if i dont like them ill go buy a new set
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