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Tech Forum : Steering ratios for manual/power steering

- BMW E21 Community
   - Tech Forum
      - Steering ratios for manual/power steering
Bill in MN   Posted Friday, Sep 22nd 6:55pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 28

Minnesota USA
1988 735, 1986 535 turbo, 1981 Baur 323i
Does anyone know if the ratios are the same for both?

melloh   Posted Friday, Sep 22nd 9:47pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 422
   
California, USA (San Jose)
1980 320is, 1991 318is
I thought the rack is generally the same, just that power has a hydraulic pump assist?

pjs323i   Posted Saturday, Sep 23rd 4:42am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 36
   
Canberra, Australia
'81 323i
I thought for all e21's it was 3.5 turns lock-to-lock. the powersteering should be the same. i have seen a kit on ebay that made it 2.5 turns lock-to-lock, it was about $AU250

cnvkellogg   Posted Saturday, Sep 23rd 9:41am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 42
   
Eugene, OR
78 320i
I have one of each on my cars and the ratio is the same as the manuel rack. I wish it was 2.5 but its not.:X

chupchup   Posted Saturday, Sep 23rd 11:13am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 86
   
Singapore
320m20
u go an try 2.5 without pw steering............ u will have great strong arms....

melloh   Posted Saturday, Sep 23rd 1:51pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 423
   
California, USA (San Jose)
1980 320is, 1991 318is
unles you put nice skinny tires on ;o)

otherwise... i'd make sure you never stop moving!


Marquis_Rex   Posted Saturday, Sep 23rd 9:55pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 476
   
UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT
The Haynes Manual states that the steering ratio has been reduced from around 21 to 20.5:1 or so however Jerremy Waltons books states that the powered rack has a ratio of 19:1. I have trouble believing it's much if any different to the stock manual steering, it feels similar to the ludicrously slow 4 turns lock to lock. The E30 M3 is definately 19:1 and if our E21 DID have that ratio it should feel similar in feel if not slightly better, with it's more positive offset steering strut layout (E21 across the board have a triffle more feel than E30s thanks to this, all other things being equal).

I've driven an E30 M3 and the steering has a bit more feel to it, although this could be to do with other factors

Bill in MN   Posted Monday, Sep 25th 4:50pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 29

Minnesota USA
1988 735, 1986 535 turbo, 1981 Baur 323i
I get 4 turns lock to lock with power steering and I really don't like it. It looks like its time to go look for a different rack!!

Marquis_Rex   Posted Thursday, Sep 28th 6:01pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 477
   
UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT
Bill in MN wrote:
I get 4 turns lock to lock with power steering and I really don't like it. It looks like its time to go look for a different rack!!

Let me know if you can find someone who does a power E21 quick rack. I'm about ready to an entire E30 front subframe with a quicker rack off of a modern Bimmer because I'm so racked off

jdench   Posted Saturday, Sep 30th 12:41am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 106

Sussex, UK
1979 E21 323i, 1998 E36 323i touring
Have a look at this,
http://cgi.ebay.co.uk/BMW-e21-Quick-Rack-Kits_W0QQitemZ120035968547QQihZ002QQcategoryZ10374QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
This should sort it out I would think.
No affiliation though

Marquis_Rex   Posted Friday, Oct 6th 11:38am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 478
   
UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT
Unfortunately not powered
I think Jason323i had some of the quick manual racks himself...

wharthog   Posted Tuesday, Oct 10th 2:19am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 63
   
SF Bay,California, USA
1982 323i, , R1150RT
Hey jason323i is that true? I've been looking for a quicker power rack and can only find the manual one. I'm even thinking of losing the power steering just for the sake of simplicity... but people keep telling me to keep it for the sake of originality and rarity...


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