924Board.org

jpv · Joined: 26 Apr 2003 Posts: 15

My steering rack is geting old and worn, I don't know if a rebuild will help alot so I'm thinking in replacing. I've found a 924S in a junk yard and it still has it's steering rack on, will it fit on my '76 924? and is the ratio shorter?

Thanks!
JPV

924RACR · Posted: Wed Sep 10, 2003 10:08 pm Post subject:

That should be a power steering rack in the 924S. That would take a fair bit of engineering to retrofit.

When you say the rack is worn - why? What makes you feel that it's worn out? What makes you so sure it's not other parts?
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
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AznDrgn · Posted: Wed Sep 10, 2003 10:34 pm Post subject:

I still have the rack out of my '78 NA if you need one.
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jpv · Joined: 26 Apr 2003 Posts: 15

well, in roads with bad surface it knocks alot and it has a little play in center. Although the steering rack itself has some play (but it is very little, maybe it's normal...), I supose most of the play is due to the linkage between he steering rack and the steering column. I was thinking when I got around to fix that play maybe I would also substitute the steering rack with the one from a 924S because I think it has a shorter ratio.... but I'm not sure about that last one... anyone knows?

JPV

924RACR · Posted: Fri Sep 12, 2003 10:55 pm Post subject:

You've probably got bad upper strut mounts.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

MazMan · Joined: 18 Sep 2003 Posts: 1 Location: Lancaster, NY

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

The 931 steering rack has a tighter ratio than the 924 rack. I have one waiting to go into my car when I rebuild the steering.
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'81 931 in various states of assembly

porschetroy · Joined: 30 Dec 2002 Posts: 32 Location: Sacramento

Uhh....I don't know about that CBass. I have an '82 931 and used to have a '78 924. The steering in the NA definitely felt quicker. According the "Little Spec Book", both the NA and 931 had a 19.15:1 ratio and non-USA cars had 22.39:1 (which would be slower). Somewhere, I have read that the 931 had the slowest ratio, then the 924, and then the Rabbit. I am actually considering swapping a Rabbit rack into my 931 if I can verify the quicker ratio. I am really not satisfied with the ratio of my 931 and was pretty happy with the steering of my '78 924.

Can anybody verify the numbers?

Thanks, Troy

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

Hmm, that's interesting. I don't remember where I read that, but I saw it somewhere... I thought it was in the tech section, but now I can't seem to find it. Has anyone else read this?
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'81 931 in various states of assembly

924 turbo · Posted: Sun Sep 21, 2003 1:21 pm Post subject:

According to PET, and to the '81 model supplement, all the 924 and turbo models in North America have a 19.15:1 steering ratio, as do all left hand drive Euro/ROW 924 n/a models. PET seems to indicate that there is a different rack for the Euro/ROW turbo in right hand drive only, which might be the 22.39:1 version. This seems to indicate that all left hand drive 924 models got the same rack worldwide.
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Jon Furst

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

I guess I am mistaken

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'81 931 in various states of assembly

simsport · Joined: 06 Nov 2002 Posts: 573 Location: UK Warrington

You may find it is the link rod and not the rack itself.

If it knocks when on full lock at slow speeds its most likely the joints in the rod as they 'find their slack' at that time and its more noticeable.

Common on uk cars.

Cheers
Simon
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-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

i can confirm that part of the M471 "S" option on the '80 931 was the 22.39:1 rack. i don't know what other years/models it was also included with.

-nick

Paul · Posted: Tue Sep 23, 2003 9:34 am Post subject:

Yep it was used to reduce the steering effort to turn those HUGE (in 1980) 205/55x16 tires.

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

From the Tech Specs booklet:

924 all markets / 931 US+Canada+Japan
Steering ratio: 19.15:1
Turning circle: 10.08 m
Track circle: 9.21 m
Turns, lock to lock: 4.02

931 ROW (option for US+Canada+Japan)
Steering ratio: 22.39:1
Turning circle: 10.3 m
Track circle: 9.5 m
Turns, lock to lock: 4.02
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erstwhile owner of just about every 924 variant ever made