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Who wants green front springs? (NK/2000)


duggi

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I'm having a set of front springs made to the green specification at ~$550.  If anyone else is interested and would like me to add more than one set to my order, please DM me within the next day or two.

 

Note that this is likely far cheaper than you will ever see a used or new-old-stock set for sale.  If there's interest in the rears, I can have my set sent up for replication when I do the rear of the car in a few months.  I'm not making any money off of this, just offering to facilitate other folks getting their hands on some hard-to-find parts in brand-new condition ?

 

I'm providing them an example spring from my 2000, so they have the dimensions, and the specifications from the factory blue binder...see below.  I've verified that my example spring matches the physical dimensions in the first three highlighted rows.

 

E1644583-3C01-4907-94F4-A26DA8102710.png

Edited by duggi
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'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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3 hours ago, Hans said:

Given that the size is constant, what sets the different colour values?

 

I have no idea how they achieve different spring rates from the same diameter/coil-count springs, to be honest.  Just not my area of expertise.

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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  • 2 weeks later...

That’s great that you are doing this!I would jump on board but bad timing right now. Down the road I may have to look you up for these. I have all the original Green ones in my tilux. I don’t think they need replacing even though they are slightly shorter than what the specs outline. After 50 years its only expected they would be a little shorter.

 

i would have to say the hardness of the steel determines the difference in the 3 colours. Makes sense to me. Softer the steel the more give it will have.

Edited by Naseem Jarjoura
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10 hours ago, Naseem Jarjoura said:

That’s great that you are doing this!I would jump on board but bad timing right now. Down the road I may have to look you up for these. I have all the original Green ones in my tilux. I don’t think they need replacing even though they are slightly shorter than what the specs outline. After 50 years its only expected they would be a little shorter.

 

i would have to say the hardness of the steel determines the difference in the 3 colours. Makes sense to me. Softer the steel the more give it will have.

 

Yeah I got an email from SpringWorks actually that clued-me in to the fact that it's different alloys/hardness levels that determines the rate.

 

Interestingly, the 53 year old springs on the Chamonix car measured up perfectly to the dimensions in the book when I removed them, down to the mm.  They hadn't sagged at all, at least unloaded ??‍♂️ 

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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I should've posted this table in this thread too, for reference.  These are the values I was able to discern for all the different springs based on my one white spring at 140 lbs/in (measured at 138, corrected for age to 140).

 

NK 2000/ti/tilux Factory Spring Rates
  KP LB Lbs/In
Red Front 308-318 679-701 135.2-139.6*
Red Front "HD" 360-372 793.6-820.0* 158.1-163.3*
Red Rear 397-410 875-903 174.3-179.8*
White Front 319-329 703-725 (138**)140-144.4*
White Front "HD" 373-385 822.3-848.8* 163.8-169.0*
White Rear 411-425 906-937 180.4-186.6*
Green Front 330-340 727-750 144.8-149.2*
Green Front "HD" 386-398 850.9-877.4* 169.5-174.6*
Green Rear 426-439 939-968 186.9-192.7*

*calculated value

**measured value

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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9 hours ago, Naseem Jarjoura said:

I’m not to familiar with other bmw’s but is it possible to weld on different size spring seats? What other model bmw would be close to the same size spring?

 

 

From what I understand, e9 springs directly fit, but then you're talking about a much different spring rate meant for a heavier car with a heavier engine.  My goal is to have the NK feel like it was supposed to, not just "work."

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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I can appreciate that diggi. I never stop doing things to my car. I have belstien shocks front and back with IE front sway bar and original rear sway bar.  I’m waiting on rear trailing arm bushings from Germany. I put the IE inserts into subframe bushings. Only thing left is change the springs. 

 

I put an aluminum fly wheel in as well. I hope i like it.

 

do  you know if anyone makes a strut brace for the NK?

Edited by Naseem Jarjoura
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I'm also going with the Bilstein shocks, simply because it's the path of least resistance there...

 

I have the original front and rear sway bars as well as green-striped rear springs already, whites for the front (obviously greens in production).

 

I'm not sure anyone makes a brace, but I'm hoping Kooglewerks will soon (he mentioned he wanted to).

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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It looks like your car has early half-shafts, do you also have a long-neck differential?

 

The weights you show disappeared at 2000 VIN 1334400, 2000A VIN 1231444, TI VIN 1434826, and TiLux VIN 1456069.

 

I suspect that the early half-shafts and/or longneck diff were probably causing some excess NVH from entering the cabin.  Their location on the far ends of the carrier, just inside the location of the subframe mount would dampen any oscillations introduced from the half-shafts or differential right before they hit the subframe mounts, thus reducing the amount of NVH the subframe mounts have to deal with.  The fact that they disappear around the same time as the sideloader and updated half-shafts appeared make me think they had something to do with improvements in the way those parts mount.  Having the half-shaft with CV joints at both ends would theoretically reduce vibration (akin to the relationship between a flywheel and a front harmonic balancer).

 

I'll look on the '67 with it's long-neck later today to see if it has these weights (and the earlier half-shafts), I'd bet it does (it also has the weight on the driver's side engine mount).  The '68 does not for sure.

 

FWIW the parts catalog lists the right weight at 1.1 kg and the left at 1.65 kg.

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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So the 09/66 production 2000 has the weights and long-neck diff, but has the slightly later half-shafts with the CV joints at both ends (but they are not the same part as the half-shafts that go in the '69 and later cars and does not show interchangeability).

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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Interestingly, the middle half-shaft is identical to the last one, except for the asymmetric bolt pattern.  I need to look at my '68 to see if it has the asymmetric or symmetric bolts (11/67 production).  It does have the sideloader.  I'll report back in a few, going down to the back yard with the dog in a few anyway, won't take me more than a moment to verify.

 

I suspect it'll have asymmetric with the sideloader since the symmetric isn't mentioned until the '69 update (but I know the sideloader and front subframe changed earlier).

Edited by duggi

'67 BMW 2000 (Chamonix)

'68 BMW 2000 (Granada)

'84 BMW 528e, '87 BMW 325is, '15 535i, '18 M3cs

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