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|11-06-2012, 05:39 PM||#1|
Join Date: Jan 2010
Location: Valparaiso, IN
My Ride: '00 328i
OFFICIAL: ZHP steering thread
I'm making this thread so that the facts can be clearly laid out for anyones use.
this is info regarding the notorious "zhp steering rack"
for a while some people believed that the zhp had a special rack just for that package. however, people were finding steering racks with the same part number on regular 330s. so these are the facts to clarify.
The 330 zhp only received the steering rack with the part number 7852974712
the regular 330s could receive 3 different steering racks. how bmw chose these cars, we do not know. but the numbers are
and a non ZF label from TRW with unknown part number.
this means that a zhp can only receive the 712 rack, but there are a number of regular 330's that would receive this rack as well. like i said, we're not really sure there's a pattern to which cars received what rack.
all we can be sure of is that the 712 rack is the zhp rack that people talk about.
all of these racks have a ratio of 13:7:1
this means the lock to lock will be 3 turns for any 330. but what makes the 712 (zhp) rack different? that will be explained in the following quote from the rack doctor. the internals ARE different despite the same ratio. this is what contributes to the better feel in the zhp, and some zsp, 330s.
at this point, we do not know how many 330s got the 712 rack and how many got the other two racks. all we can be sure of is all zhps have the 712 rack or should have it.
note: this information is regarding 2001+ 330s. earlier 330s will have different racks and part number that are not discussed in this thread
I am no expert. but i think we can all agree that rich is based on his years of experience and evidence presented. i will post pics of both the yellow and purple rack tags for reference purposes just so you can see what they look like if you do not know.
i really hope this clears things up for some people, especially people searching and learning this for the first time. i hope this is an end all post.
if anything needs to be added or edited i will do it at my digression.
**if the mods want to move this to general and sticky it, so be it. but if that's the case it should be locked to avoid another episode.
choose to click or forever hold your peace ;)
Last edited by peytonracer4; 11-06-2012 at 06:03 PM.
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