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      06-27-2019, 05:52 PM   #1
stevehifi
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Anyone know the MP HAS spring rates?

Has anyone found out what the spring rates are for the MP HAS? I'm aware that the front springs are progressive and rears are linear.

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      06-27-2019, 06:17 PM   #2
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If you know the front are progressive, what do you expect as an answer regarding their rates?
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      06-27-2019, 06:29 PM   #3
stevehifi
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even progressive rate springs have a rate range. it should still be available.
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      06-27-2019, 08:30 PM   #4
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Quote:
Originally Posted by CanAutM3 View Post
If you know the front are progressive, what do you expect as an answer regarding their rates?
They look like dual rate springs to me (hence the plastic covering on the coils that will bind first). BMW specs the initial and final spring rates (but unfortunately I don't have them) based upon the docs I saw for the F8x ZCP and M2 rear springs (they also have the coverings for coil bind in the initial rate coils). For the F8x ZCP and M2 springs BMW has a force graph showing force per distance compressed with a very distinct knee/bend in it when the rate shifts from the initial one to the final one (not a continuously variable spring rate).

Bilstein gives you the final spring rate on the progressive springs in their coil overs.
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      06-28-2019, 10:24 PM   #5
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Quote:
Originally Posted by FaRKle! View Post
Quote:
Originally Posted by CanAutM3 View Post
If you know the front are progressive, what do you expect as an answer regarding their rates?
They look like dual rate springs to me (hence the plastic covering on the coils that will bind first). BMW specs the initial and final spring rates (but unfortunately I don't have them) based upon the docs I saw for the F8x ZCP and M2 rear springs (they also have the coverings for coil bind in the initial rate coils). For the F8x ZCP and M2 springs BMW has a force graph showing force per distance compressed with a very distinct knee/bend in it when the rate shifts from the initial one to the final one (not a continuously variable spring rate).

Bilstein gives you the final spring rate on the progressive springs in their coil overs.
Any chance you can link to those documents with the spring rates?
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      06-29-2019, 05:43 PM   #6
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Any chance you can link to those documents with the spring rates?
Unfortunately, I don't know of anywhere they're linked online. I saw some hard copies once while researching some things for my own setup. What info were you looking for in particular?
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      07-01-2019, 01:01 PM   #7
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Quote:
Originally Posted by Racer20 View Post
Any chance you can link to those documents with the spring rates?
Unfortunately, I don't know of anywhere they're linked online. I saw some hard copies once while researching some things for my own setup. What info were you looking for in particular?
The spring curves in detail. No big deal.
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      07-01-2019, 04:57 PM   #8
stevehifi
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don't forget the rears, they are linear so should be easy to find somewhere. shocked that no one has a clue.
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