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Post by brolston on Oct 23, 2008 12:22:15 GMT 12
Hi,
I have a Toyota Hilux 4wd and have a few questions
I am wanting to put a body lift in.
Is there a minimum height I can go before I need a cert?
I have put 33x12.5R15 tyres on it. Original tyre size was 31x10.5R15
Will this increase in size need a cert?
Thanks
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Post by Justin on Oct 29, 2008 9:03:45 GMT 12
Hi there.
1) A body lift of any amount will require LVV Certification, as there will be steering and braking components which may have been affected by the lift, which need to be certified as being safe and fit for use.
2) I don't know if Toyota Hilux's have ever been factory fitted with 31X10.515 tyres, so the vehicles correct original tyre size would need to be determined first. A quick look in the vehicle's hand book or on the tyre placard on the door pillar will tell you what the original tyre sizes were, and the determination can then be made.
The threshold for requiring LVV certification is anything 5% greater than the original tyre's rolling circumfrence. The other factor you would need to consider with tyres that large is whether the mud guards adequately cover the tyres. Mud guard flares or extensions may also be required.
I hope this helps.
Justin
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Post by brolston on Oct 29, 2008 15:08:27 GMT 12
Thanks
Is there a preferred material for the lift? I see alot of people use polyurethane blocks. Is this ok or is something like aluminium better?
I just checked the size of the tyres that hiluxs came out with and they are not 31s like I thought. They came with 205R16s.
So I guess going to 33s is going to be more than 5% increase.
I will be fitting flares to help cover the tyres.
Am i going to need to recalibrate the speedo or do anything else to get a cert?
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Post by Justin on Oct 30, 2008 7:40:15 GMT 12
There is no requirement for the material used for a body lift, other than they (the blocks or spacers) should be fit for the purpose. Aluminium seems to be the most popular choice for this. Your speedometer will most likely require recalibrating. Steering shaft attachment is a critical factor with body lifts, as the shaft's spline or shaft attachment may be decreased significantly. Your LVV Certifier will advise you of any problems or items which require rectification after the vehicle has been inspected.
Cheers, Justin
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gudgyz
Junior Member
if one tripowers good then two must be better!!
Posts: 6
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Post by gudgyz on Feb 17, 2009 19:24:09 GMT 12
Having done a body lift, albeit not on a hilux, things like the seatbelt anchorage points are a consideration as often they are close to or into the chassis, also silly things like radiator hoses etc. Steering was fine with 40mm lift. I used nylon spacers, in for years with no problems.
Be aware that the larger tyre WILL have a detrimental affect on the braking of the vehicle, i went from 29" to 34" and was astounded at the affect on the brakes!
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Post by polarice on Mar 9, 2011 20:16:22 GMT 12
The 205R16s are the same diameter as the 31x10.5R15 and shipped from the Thames NZ Toyota Factory. Depending on tyre manufacturer they can be slightly smaller or large diameter.
However the width is massively different, which can also be an issue.
My question is this though:
The guidelines of modifications talk about a maximum of 50mm modification under the "Lowering" heading. Nothing mentioned about the raising of a vehicle with a body lift.
Presuming it is under the same guidelines does the 49mm body lift i have on my LN106 hilux fall within and not need certifying?
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Post by Justin on Mar 10, 2011 8:02:00 GMT 12
Hi polarice
Unfortunately there is no threshold for body lifts - so they all need LVV Certification.
This isn't for a lack of trying though, we've been working closely with the NZ4WD Association to come up with a solution, however there are a lot of hurdles, especially as you've got body and suspension lifts on a huge range of vehicles, all of which will react differently to either lift. At this stage there is no simple solution, however if there is a solution out there, we'll find it.
I hope this helps.
Justin
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