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Janne Aittola
New User
Username: jannea

Post Number: 35
Registered: 07-2018
Posted on Sunday, 26 April, 2020 - 23:16:   Edit PostDelete PostView Post/Check IP

Any suggestions to a crossover Silver Shadow I rear springs?

coil diameter = 155 mm
wire diameter = ~17 mm
uncompressed height = ~535 mm
number of coils = 11

r
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Robert J. Sprauer
Frequent User
Username: wraithman

Post Number: 609
Registered: 11-2017
Posted on Sunday, 26 April, 2020 - 23:19:   Edit PostDelete PostView Post/Check IP

Did you notice a white or yellow paint brush mark on the lower section of the spring?
Yellow is heavy duty, white is standard rating.
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Janne Aittola
New User
Username: jannea

Post Number: 36
Registered: 07-2018
Posted on Sunday, 26 April, 2020 - 23:24:   Edit PostDelete PostView Post/Check IP

Ok, I have to check
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Brian Vogel
Grand Master
Username: guyslp

Post Number: 3031
Registered: 06-2009
Posted on Monday, 27 April, 2020 - 02:10:   Edit PostDelete PostView Post/Check IP

If you're in the US, there is a spring maker who's been making them to spec for a long time now. I had a set I ended up selling to another member a while back who installed them on his Shadow (and who will probably end up chiming in).

Download the RR & Bentley Parts, Repair, Restoration & Other Resources Compilation and search on "Coil Spring Specialties."

Brian
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Geoff Wootton
Grand Master
Username: dounraey

Post Number: 2205
Registered: 05-2012
Posted on Monday, 27 April, 2020 - 03:03:   Edit PostDelete PostView Post/Check IP

Hi Janne

Thought I'd chime in. This link to an earlier thread may be useful. It's one I started when I was replacing my rear springs:

http://au.rrforums.net/forum/messages/17001/16457.html?1438295588

The springs I fitted have 11 coils. I found the rear to be slightly high at first but with time they have settled down to the perfect ride height. I believe the OEM springs have 10 coils. Flying Spares springs appear to have 10 coils, judging from the photo on their website.

If you are not in the US you may be able to find a manufacturer of speciality springs local to you. I once enquired at a local main dealer for the OEM price - $650 each. Needless to say I declined their offer.
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Janne Aittola
New User
Username: jannea

Post Number: 37
Registered: 07-2018
Posted on Monday, 27 April, 2020 - 21:47:   Edit PostDelete PostView Post/Check IP

Yes, I asked local spring specialist and they could not help and also here in Finland the local OEM price is 400-500 , so any suggestions to crossover part are gladly taken.
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ross kowalski
Prolific User
Username: cdfpw

Post Number: 1381
Registered: 11-2015
Posted on Tuesday, 28 April, 2020 - 08:44:   Edit PostDelete PostView Post/Check IP

Weight of car tested 5100

Front Rear
F/R dist 0.52 0.48
F/R lbs 2652 2448
F/R wheel lbs 1326 1224

I found an article with the weight distribution and tested weight.
Looks like the front springs are 1326 lbs load
Looks like the rear springs are 1224 lbs load

I one knew the desired compressed spring height I would think a suitable substitute could be found.

Best

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