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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, Jul-13-2018, 01:42:38 AM   #21
Volke
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Default Re: MK20 ABS unit differences

Quote:
Originally Posted by terraphantm View Post
I don't know if my measurements were accurate enough to say for sure whether or not the ZHP rack is 49mm vs 50mm or M3 rack 46mm vs 47mm. I also never had a ZCP rack on hand, I can't confirm or deny whether there's a measurable difference there.

Edit: In this post (which I believe was closer to when I actually changed steering racks and did the measurements), I said the M3 was ~46.5 mm/rev. http://www.m3forum.net/m3forum/showp...0&postcount=13
Are you absolutely sure the ZHP rack is progressive? I assume it's a yellow tag 712?

My 330 rack measurements definitely said 50mm/rev at center, it had exactly 3 turns lock to lock and 150mm total travel which makes it 100% linear. I don't think mine is a 712 though. I'll crawl under the car when I get it back from the cage fabricator next week. If your rack is 50mm/rev at center and gets faster, it would also be less that 3 turns lock to lock.

EDIT: Let's postpone this discussion for now. I'll start a thread later to document stuff in one place after I have my M3 rack on hand and my car back so I can get my 330 rack part number.
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Last edited by Volke; Fri, Jul-13-2018 at 01:51:52 AM.
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Old Fri, Jul-13-2018, 01:46:22 AM   #22
terraphantm
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Default Re: MK20 ABS unit differences

Mine takes about 2.75 turns lock to lock if I recall correctly.

Edit: This non-ZHP also seems to be about the same L2L. An 04 non-ZHP and ZHP should have the same rack

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Last edited by terraphantm; Fri, Jul-13-2018 at 01:50:37 AM.
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Old Fri, Jul-13-2018, 01:55:36 AM   #23
Volke
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Default Re: MK20 ABS unit differences

Interesting. Yeah, I'll definitely get a thread started later to get everything sorted and documented in one place. It would be nice to have a definitive guide to rack swaps.
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Discussing MK20 ABS unit differences 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)