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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jun-04-2010, 07:18:44 PM   #1
pro50gt
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Default ZCP M3 and M3 spring different?

Is there any difference between the ZCP M3 and M3 spring? rate, height, etc?

Thanks in advance... Carlos
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Old Fri, Jun-04-2010, 07:30:20 PM   #2
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From what I know there isn't but not 100% sure.
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Old Fri, Jun-04-2010, 07:48:15 PM   #3
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Carlos,

According to the BMW part numbers, ZCP and cars from 2003.5 share the same part numbers. So I assume the difference is between 2003.5 before and after. I'm unsure of what the spring rate differences are, if there are any and they all look like the same height to me...
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Old Fri, Jun-04-2010, 07:54:02 PM   #4
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For production dates 12/04+ the M3 suspension was "revised to reduce understeer." So ZCP has the same suspension as all 12/04+ M3's.
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Old Fri, Jun-04-2010, 09:20:06 PM   #5
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So what does the ZCP suspension differs than stock 2003.5 onwards ?

Shocks ?
roll-bars ?
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Old Fri, Jun-04-2010, 10:03:06 PM   #6
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Quote:
Originally Posted by Makavelim3 View Post
So what does the ZCP suspension differs than stock 2003.5 onwards ?

Shocks ?
roll-bars ?
Shocks and springs changed post 12/04 production date. And note that ALL M3's (regular & ZCP) have identical suspension from 12/04 on. The suspension change was designed to have a smoother ride and reduce body lean.
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Old Fri, Jun-04-2010, 10:56:08 PM   #7
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Quote:
Originally Posted by roobe16 View Post
Shocks and springs changed post 12/04 production date. And note that ALL M3's (regular & ZCP) have identical suspension from 12/04 on. The suspension change was designed to have a smoother ride and reduce body lean.
The biggest changes actually made the car a little less prone to understeer due to the new spring rates.
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Old Fri, Jun-04-2010, 11:55:07 PM   #8
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Quote:
Originally Posted by roobe16 View Post
For production dates 12/04+ the M3 suspension was "revised to reduce understeer." So ZCP has the same suspension as all 12/04+ M3's.
Quote:
Originally Posted by vndkshn View Post
The biggest changes actually made the car a little less prone to understeer due to the new spring rates.
Yes.
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Old Wed, Aug-04-2010, 08:43:16 AM   #9
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Quote:
Originally Posted by roobe16 View Post
Shocks and springs changed post 12/04 production date. And note that ALL M3's (regular & ZCP) have identical suspension from 12/04 on. The suspension change was designed to have a smoother ride and reduce body lean.
I've read on forums that the regular M3s after 12/04 production also use ZCP; however, I'm trying to find the actual source that says so. Where can I find the source that says so? One forum mentioned a BMW service bulletin says it but I can't find that service bulletin.
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Old Wed, Aug-04-2010, 08:49:29 AM   #10
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^ Look up the part numbers
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Discussing ZCP M3 and M3 spring different? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)