Suspension modification that's legal

Suspension modification that's legal

Author
Discussion

MaxRothery

Original Poster:

201 posts

112 months

Saturday 28th November 2015
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Hi all

Right, I'm planning to use a jag V6 in my triumph but am having trouble getting an axle that will fit under in the rear and as the DVLA say the car must have the stock suspension but they don't give any further detail on that so could you add parts? And is it possible, could you use a jag IRS in connection with the stock drop links so it can be argued that it could be retuned to stock?

Thank you
Max

stevieturbo

17,256 posts

247 months

Saturday 28th November 2015
quotequote all
Not really sure what the question is.

What is strange about the rear axle that you cannot get one to "fit under the rear" ?

And which aspects of the "stock" presumably standard suspension must be retained ?

MaxRothery

Original Poster:

201 posts

112 months

Saturday 28th November 2015
quotequote all
I
stevieturbo said:
Not really sure what the question is.

What is strange about the rear axle that you cannot get one to "fit under the rear" ?

And which aspects of the "stock" presumably standard suspension must be retained ?
Sorry, just my bad wording. I mean that the standard suspension would be retained but with an extra bar, similar to an anti-tramp bar. I was thinking of using a jag IRS but adapting it to use my triumphs drop links. The half shafts would be shortened to fit

stevieturbo

17,256 posts

247 months

Sunday 29th November 2015
quotequote all
MaxRothery said:
Sorry, just my bad wording. I mean that the standard suspension would be retained but with an extra bar, similar to an anti-tramp bar. I was thinking of using a jag IRS but adapting it to use my triumphs drop links. The half shafts would be shortened to fit
If you need to retain standard...how will a Jag IRS work in that respect ?

Is the current axle an IRS or live axle ? And what style of suspension does it use ?



MaxRothery

Original Poster:

201 posts

112 months

Sunday 29th November 2015
quotequote all
stevieturbo said:
MaxRothery said:
Sorry, just my bad wording. I mean that the standard suspension would be retained but with an extra bar, similar to an anti-tramp bar. I was thinking of using a jag IRS but adapting it to use my triumphs drop links. The half shafts would be shortened to fit
If you need to retain standard...how will a Jag IRS work in that respect ?

Is the current axle an IRS or live axle ? And what style of suspension does it use ?
It's a live axle with drop links/4 link. I'm trying to use the jag multi-link set up with the drop links so I can claim I'm using the standard suspension

I'll add a diagram later

marshalla

15,902 posts

201 months

Sunday 29th November 2015
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Presumably, you're trying to get the necessary "8 points" under the modified vehicle rules ?

https://www.gov.uk/vehicle-registration/radically-...

TBH, it sounds like a recipe for disaster.

MaxRothery

Original Poster:

201 posts

112 months

Sunday 29th November 2015
quotequote all
marshalla said:
Presumably, you're trying to get the necessary "8 points" under the modified vehicle rules ?

https://www.gov.uk/vehicle-registration/radically-...

TBH, it sounds like a recipe for disaster.
Exactly, I'm removing the engine and gearbox and axle, keeping the steering and she'll and trying to keep the suspension at the same time and it's cheaper for me to use the jag Multi-link that I have rather than buy an atlas and shorten it

stevieturbo

17,256 posts

247 months

Sunday 29th November 2015
quotequote all
I dont see how you're ever going to pass off a Jag IRS as anything remotely like what should be in the car as far as axle or suspension goes.

It would be far easier to use a different live axle, and despite it being swapped, visually it will still be a live axle and nobody would be any the wiser on that count.

MaxRothery

Original Poster:

201 posts

112 months

Sunday 29th November 2015
quotequote all
stevieturbo said:
I dont see how you're ever going to pass off a Jag IRS as anything remotely like what should be in the car as far as axle or suspension goes.

It would be far easier to use a different live axle, and despite it being swapped, visually it will still be a live axle and nobody would be any the wiser on that count.
Fair enough, I'll see what I can find

E-bmw

9,192 posts

152 months

Monday 30th November 2015
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Why not just make it stock, and then change the axle afterwards if you really need to do what you want?

Yes, I know it is more work, but if it gets you what you want, not a problem.

Mr2Mike

20,143 posts

255 months

Wednesday 2nd December 2015
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MaxRothery said:
It's a live axle with drop links/4 link. I'm trying to use the jag multi-link set up with the drop links so I can claim I'm using the standard suspension

I'll add a diagram later
Your use of the term "drop links" is very confusing. Drop links are typically the parts that attach an anti-roll bar to the moving parts of a suspension system. It sounds like you are actually referring to the trailing arms?

The Jag IRS system is very heavy indeed, do you really need the enormous bulk of the Jag axle? Why not stick with a live axle, something a bit stronger if needed?

MaxRothery

Original Poster:

201 posts

112 months

Wednesday 2nd December 2015
quotequote all
Mr2Mike said:
MaxRothery said:
It's a live axle with drop links/4 link. I'm trying to use the jag multi-link set up with the drop links so I can claim I'm using the standard suspension

I'll add a diagram later
Your use of the term "drop links" is very confusing. Drop links are typically the parts that attach an anti-roll bar to the moving parts of a suspension system. It sounds like you are actually referring to the trailing arms?

The Jag IRS system is very heavy indeed, do you really need the enormous bulk of the Jag axle? Why not stick with a live axle, something a bit stronger if needed?
Yeah, sorry about that I do mean trailing arms . I'll be sorting it out soon

330p4

668 posts

230 months

Monday 28th December 2015
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Max that legislation is for registering a modified vehicle like a kit car where you need 8 points to retain a donor/age related plate your car is already registered I trust ? Even with a kit car if you are using the original chassis and putting on a different body there is no need for an IVA. The engine conversion will be fun if it is on canbus like the V8 jags you will have to fool the ecu with the correct can data for any parts missing like wing mirrors , body processor etc
Ian

MaxRothery

Original Poster:

201 posts

112 months

Monday 28th December 2015
quotequote all
330p4 said:
Max that legislation is for registering a modified vehicle like a kit car where you need 8 points to retain a donor/age related plate your car is already registered I trust ? Even with a kit car if you are using the original chassis and putting on a different body there is no need for an IVA. The engine conversion will be fun if it is on canbus like the V8 jags you will have to fool the ecu with the correct can data for any parts missing like wing mirrors , body processor etc
Ian
What the plan with this was to try and create a hybrid IRS set up using Jaguar S type multi link and the triumph trailing arms. This would have produced a 3 dimensional movement arc. This was an attempt at keeping the stock suspension trailing arms to keep the 2 points I would need to keep the plate number. As it wasn't possible, I decided to remove the plan from my project for now. Once I have completed the current plan for the car, I might consider bringing the idea back