Rear HD springs.

landowner · May 21, 2017

bluedog333 said:
Thanks! Some people are adamant that it does make a difference which way up, I'm pretty sure on Land Rover it doesn't make a difference!

My tighter (softer) coils are at the bottom, couldn't remember which way they were on the Disco so that's how they went on. The spring doesn't know which way up it is or which end the pressure is coming from it just compresses as weight is applied. or am I wring again

?

bluedog333 · May 21, 2017

landowner said:
My tighter (softer) coils are at the bottom, couldn't remember which way they were on the Disco so that's how they went on. The spring doesn't know which way up it is or which end the pressure is coming from it just compresses as weight is applied. or am I wring again ?

I think most are tight coils top to help mud clear the bottom, there was some waffle about unsprung weight blah blah, but I got bored reading! I believe LR fit them tight at the top.
And aren't the tight coils stiff?

landowner · May 21, 2017

may be wrong again but tight coils are softer because of the leverage when applied. If the coils are further apart then they need more weight to press them down because of the angle of the coil.
does that make sense ?
And the softer coils have rubbers between them as they are touching when heavy weight applied

bluedog333 · May 21, 2017

landowner said:
may be wrong again but tight coils are softer because of the leverage when applied. If the coils are further apart then they need more weight to press them down because of the angle of the coil.
does that make sense ?
And the softer coils have rubbers between them as they are touching when heavy weight applied

Being progressive, the coils should be softer when open (uncompressed) and stiffer when closed (compressed), so closed coils should be stiffer to begin with.

landowner · May 21, 2017

Just read up on it and still non the wiser.
With weight on the landy the narrower coils are compressed and the wider apart ones aren't so I assume that the narrow coils are softer and compress easier
As I said... non the wiser

Also the tighter coils have rubbers in between them because they are touching when under heavy load

bluedog333 · May 21, 2017

landowner said:
Just read up on it and still non the wiser.
With weight on the landy the narrower coils are compressed and the wider apart ones aren't so I assume that the narrow coils are softer and compress easier
As I said... non the wiser
Also the tighter coils have rubbers in between them because they are touching when under heavy load

I wouldn't lose any sleep over it, as long as they work!

landowner · May 21, 2017

bluedog333 said:
I wouldn't lose any sleep over it, as long as they work!

Work lovely for me, tow heavy car trailer quite a bit (1 ton empty) and nice smooth ride and disco springs give a little lift as Defender 90 is almost half a ton lighter . Some may not like the body roll but its not a sports car and quite easy to fit anti roll bar if you want best of both

bluedog333 · May 21, 2017

landowner said:
Work lovely for me, tow heavy car trailer quite a bit (1 ton empty) and nice smooth ride and disco springs give a little lift as Defender 90 is almost half a ton lighter . Some may not like the body roll but its not a sports car and quite easy to fit anti roll bar if you want best of both

Good to know. I'll see what my local Landy parts shop has got in, they'll know more than me.

landowner · May 21, 2017

bluedog333 said:
Good to know. I'll see what my local Landy parts shop has got in, they'll know more than me.

Wont fit a 110 though, 110 rear springs are a lot bigger than 90.. My mate puts smaller springs inside his 110 springs to help with the weight

bluedog333 · May 21, 2017

landowner said:
Wont fit a 110 though, 110 rear springs are a lot bigger than 90.. My mate puts smaller springs inside his 110 springs to help with the weight

...after all that.

I'll either be getting HD Britpart, or 'standard' 110 with helper springs. I don't know! This is what happens with all shock/suspension threads!

bluedog333 · May 21, 2017

landowner said:
Wont fit a 110 though, 110 rear springs are a lot bigger than 90.. My mate puts smaller springs inside his 110 springs to help with the weight

.

landowner · May 21, 2017

bluedog333 said:
...after all that. I'll either be getting HD Britpart, or 'standard' 110 with helper springs. I don't know! This is what happens with all shock/suspension threads!

I found HD springs on my 110 had a very hard ride when running light. Helper springs sound like the way to go then

Retroanaconda · May 21, 2017

The leveller was fitted to station wagons until Td5 came in I believe, so well into 'Defender' run.

Defender 110 rear springs:

LH Levelled: NRC6388 (blue/blue)
RH Levelled: NRC7000 (green/white)

LH Non-Levelled (HD): NRC6904 (red/green)
RH Non-Levelled (HD): NRC6389 (red/red)

Progressive (Td5-on): RKB101111 (brown/purple)

There is also a triple-rate progressive spring fitted to Tdci station wagons - RKB500300. I'm lead to believe this is slightly softer than the Td5 one but not 100% sure.

bluedog333 · May 21, 2017

Retroanaconda said:
The leveller was fitted to station wagons until Td5 came in I believe, so well into 'Defender' run.

Defender 110 rear springs:

LH Levelled: NRC6388 (blue/blue)
RH Levelled: NRC7000 (green/white)

LH Non-Levelled (HD): NRC6904 (red/green)
RH Non-Levelled (HD): NRC6389 (red/red)

Progressive (Td5-on): RKB101111 (brown/purple)

There is also a triple-rate progressive spring fitted to Tdci station wagons - RKB500300. I'm lead to believe this is slightly softer than the Td5 one but not 100% sure.

An optional extra after '87. I think most chose not to have it.
The td5 progressive springs might be worth a look.

ER1C · May 22, 2017

bluedog333 said:
We're crossing wires here! The self-levelling units were not fitted to the "Defender", hence why I asked "tdi era onwards". I seem to recall the 110 SW springs being progressive (although they may not be marketed as such), hard tops and pick-ups had HD.
Edit: referring to '91 onwards.

Yes they were...

I have a Defender 110 92 CSW.200TDI.... with self levelling units.

A word of warning, if you fit HD you will be "lifting" your Defender, do not underestimate this. I realise you are not trying to but you can easily gain a considerable lift with a simple swap to HD springs without realising it.

I will offer no further advice... seems like you already have your mind set on telling us how we are wrong

bluedog333 · May 22, 2017

ER1C said:
Yes they were...

I have a Defender 110 92 CSW.200TDI.... with self levelling units.

A word of warning, if you fit HD you will be "lifting" your Defender, do not underestimate this. I realise you are not trying to but you can easily gain a considerable lift with a simple swap to HD springs without realising it.

I will offer no further advice... seems like you already have your mind set on telling us how we are wrong

I stand corrected on that point, they were an optional extra. My mistake.
It is not my mindset to tell others they are wrong, as can be clearly seen from the majority of my comments.
Thank you for your advice.

landowner · May 22, 2017

My old 110 on HD rears, the AA van was fully loaded with all its equipment and weighed two and a quarter tons, the trailer weighs a ton so three and a quarter tons behind it

Saint.V8 · May 22, 2017

landowner said:
My old 110 on HD rears, the AA van was fully loaded with all its equipment and weighed two and a quarter tons, the trailer weighs a ton so three and a quarter tons behind it View attachment 124113

Regardless of weight - a properly loaded trailer should not place anymore than the 'nose' or 'tongue' weight specified in the vehicle handbook...seldom more than a couple hundred Kg's - for the Defender it was either 75kg or 100kg from memory

bluedog333 · May 22, 2017

landowner said:
My old 110 on HD rears, the AA van was fully loaded with all its equipment and weighed two and a quarter tons, the trailer weighs a ton so three and a quarter tons behind it View attachment 124113

There's a sight you don't see very often, a Landy rescuing a breakdown truck!

discomania · May 22, 2017

mikescuba said:
I'm no expert here but I would suggest you look into this HD spring business in more detail. A friend of mine had some fitted on his 90 and the ride was unbearable. I would only consider looking into HD springs if I was constantly carrying heavy loads.
I have the original springs on my 1990. 110 military spec Defender and they work fine for me.

I agree with Mike on this 100% - I fitted HD springs to my 90, really because they came with a pile of bits I bought at the time rather than choice... I cannot wait to get rid of them. The only way to make the ride quality half decent is to stick 200Kg of sand in the back!

Rear HD springs.

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