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      04-21-2010, 12:36 PM   #1
Erhan
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Dinan springs for Z4M - Dinan says they won't operate properly on Coupes

I was on the process of ordering Dinan springs for my M Coupe. The shop called Dinan, and Dinan said they've just learned that the springs will not operate properly on an M Coupe. Apparently they were designed using an M Roadster. Lately they have recieved some complaints that the springs are raising the back of M Coupes up in the air as opposed to lowering it.

Anyone heard anything, or had an issue with their springs?
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      04-21-2010, 12:51 PM   #2
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My springs have been on for a few months and I haven't had any issues - but I did buy them used off someone who had them on a roadster. Does Dinan have a resolution or are they just telling people not to use them?
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      04-21-2010, 12:57 PM   #3
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Looks like they fixed it.

http://www.bimmerfest.com/forums/sho...69#post5122469
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      04-23-2010, 08:09 PM   #4
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Quote:
Originally Posted by DarkstarZero View Post
My springs have been on for a few months and I haven't had any issues - but I did buy them used off someone who had them on a roadster. Does Dinan have a resolution or are they just telling people not to use them?
Are your Dinan springs progressive rate or linear?
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      04-26-2010, 04:17 PM   #5
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Quote:
Originally Posted by inTgr8r View Post
Are your Dinan springs progressive rate or linear?
I have no idea what you're saying... They look like my stock springs except blue and a little smaller but handling is far superior.
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      04-26-2010, 08:06 PM   #6
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There are two basic design concepts for springs.
Linear have a consistent spring rate, usually indicated by a spring having coils all the same size.
Progressive springs have composite rates with coils have different spacing in the top and bottom portion of the spring.
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      04-26-2010, 08:27 PM   #7
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Nice explaination of Linear vs Progressive spring rates

Question #3
http://www.swiftsprings.com/faq03.html
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      04-26-2010, 09:39 PM   #8
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Quote:
Originally Posted by inTgr8r View Post
Are your Dinan springs progressive rate or linear?
I believe all dinan springs are progressive. In fact for the most part dinan springs are just repainted eibach springs.
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      04-27-2010, 09:52 AM   #9
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Then they're progressive.
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