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Iva and towing limits
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08 Jun 2017 04:30 #181830
by Lambert
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
Bellerophon (2024 grello van daily
ADOS Attention Deficit Ooooh Shiny!
Iva and towing limits was created by Lambert
If and it's a big IF I were to take a Jimny and upgrade the brakes to vented front and disk rear, put an auto spec transfer box onto a vvt manual and swap the m13aa to m16 vvt so it had some guts and then submit it for an iva test could i stipulate a new higher tow limit be included on the paperwork?
Main reason why being there isn't much that is compact but that can tow. We have been looking at a selection of available things that are capable of legally towing 1800kg plus like yeti, kuga even duster and they are all really quite good at high speed high mpg driving but non of them inspired any confidence with a trailer on the back there's no low speed finesse not like a Jimny even in high range never mind the others not having low.
So yeah is it possible to modify a Jimny and then legally upscale the tow limit? Cheers in advance.
Main reason why being there isn't much that is compact but that can tow. We have been looking at a selection of available things that are capable of legally towing 1800kg plus like yeti, kuga even duster and they are all really quite good at high speed high mpg driving but non of them inspired any confidence with a trailer on the back there's no low speed finesse not like a Jimny even in high range never mind the others not having low.
So yeah is it possible to modify a Jimny and then legally upscale the tow limit? Cheers in advance.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
Bellerophon (2024 grello van daily
ADOS Attention Deficit Ooooh Shiny!
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08 Jun 2017 12:34 #181850
by Busta
Replied by Busta on topic Iva and towing limits
I can't answer your question directly but I am fairly sure the towing capacity for a given vehicle is not based on it's power, braking capabilities or gearing. I'm reasonably sure it used to be based on the maximum load that could be held on the handbrake on a slope of a certain angle, hence the Defender with it's transmission break and permanent 4x4 was able to hold 3.5 tons and out perform part-time 4x4s with handbrakes operating only on the rear wheels.
If you are able to find out any more information I'd be interested to know your findings. I suspect that even if you did manage to raise the towing limit for your particular vehicle, insurers would be reluctant to cover you for towing large loads without charging a prohibitively hefty premium for it.
If you are able to find out any more information I'd be interested to know your findings. I suspect that even if you did manage to raise the towing limit for your particular vehicle, insurers would be reluctant to cover you for towing large loads without charging a prohibitively hefty premium for it.
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08 Jun 2017 14:31 #181854
by Rhinoman
How can that be the case unless the axles are permanently locked? you would still only have an effective handbrake on two wheels, in Germany the SJ with transmission brake had to have a handbrake actuated locker fitted, in order to improve the handbrake. I suspect its more to do with the size of the brakes, the Defenders weight, wheelbase and the amount of torque that it has.
I don't think that its possible to change the towing weight, if you were to submit it for an IVA how would you prove that it would be safe to tow a larger weight? stability will be an issue with a bigger trailer.
Some Suzukis and a bunch of motorcycles.
Replied by Rhinoman on topic Iva and towing limits
Busta wrote: hence the Defender with it's transmission break and permanent 4x4 was able to hold 3.5 tons and out perform part-time 4x4s with handbrakes operating only on the rear wheels.
How can that be the case unless the axles are permanently locked? you would still only have an effective handbrake on two wheels, in Germany the SJ with transmission brake had to have a handbrake actuated locker fitted, in order to improve the handbrake. I suspect its more to do with the size of the brakes, the Defenders weight, wheelbase and the amount of torque that it has.
I don't think that its possible to change the towing weight, if you were to submit it for an IVA how would you prove that it would be safe to tow a larger weight? stability will be an issue with a bigger trailer.
Some Suzukis and a bunch of motorcycles.
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- MWells
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08 Jun 2017 15:11 #181855
by MWells
Replied by MWells on topic Iva and towing limits
Rather than look at an IVA speak to
SVTech
, they are specialists in changing plated weights on vehicles and may be able to help or advise accordingly
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08 Jun 2017 15:41 - 08 Jun 2017 15:58 #181856
by mlines
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Replied by mlines on topic Iva and towing limits
The braking explanation also doesn't really explain how fitting a tachograph to some vehicles increases their towing capacity (LWB Defender)
And also the current Range Rover Sport where the more powerful and better braked Sport SVR has a lower towing weight (3000kg) compared to the less powerful and less braked standard Sport (3500kg)
And also the current Range Rover Sport where the more powerful and better braked Sport SVR has a lower towing weight (3000kg) compared to the less powerful and less braked standard Sport (3500kg)
Martin
2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
Last edit: 08 Jun 2017 15:58 by mlines.
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- rappey
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08 Jun 2017 17:24 #181865
by rappey
Replied by rappey on topic Iva and towing limits
I know this is american but it does include some jap vehicles too.. May help someway to explain how max towing weights are worked out..
www.trucktrend.com/news/163-0910-truck-towing-capacity/
www.trucktrend.com/news/163-0910-truck-towing-capacity/
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