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rack and pinions #131917
10/04/08 10:24 AM
10/04/08 10:24 AM
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Supercuda Offline OP
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Gentlemen and Ladies,

I am pondering a remake of my steering. I wonder if anyone has a link to rack and pinion dimensions? I want to rewoek my steering to allow more header clearance and need to see if there is anything out there that would work.

Thanks in advance.


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Re: rack and pinions [Re: Supercuda] #131918
10/04/08 11:29 PM
10/04/08 11:29 PM
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Freeport IL USA
poorboy Offline
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Most racks I've seen are about the same size. Some are longer, some have the inner connections at the ends of the rack and some have the inner connections at the center of the rack. Then there is front or rear steer racks, but nearly all are very close to the same diamiter. Suppose the center inner connection racks would take up more room in the header area, but I haven't seen much other differences. Gene

Re: rack and pinions [Re: poorboy] #131919
10/05/08 09:48 AM
10/05/08 09:48 AM
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Supercuda Offline OP
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Well, what I wanted was lengths, not diameters. Basically what I want to do is put a rear steer rack in place of the manual box in my 65 Cuda. So I need a rack that has the inner tierod pivots about the same distance apart as the original idler/pitman pivots. I'd prefer manual steering anyway, not interested in power, don't have it now anyway.

I'll also need to find outer tierods that'll have the same diameter and taper as the stock tierods since I need to attach them to the steering arms. I used to have a TRW Chassis spec book that detailed this kind of thing, but it's about 15 years old and who knows where it is now, probably in the attic somewhere.

But if there was a PDF on the web somewhere that I could look over I'd be happy. That's what I did when I needed new shocks for a suspension drop I did on a Mustang.


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Re: rack and pinions [Re: Supercuda] #131920
10/26/08 12:00 AM
10/26/08 12:00 AM
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Posts: 6,562
Downtown Roebuck Ont
Twostick Offline
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Just Suspensions has a kit coming out. http://www.justsuspension.com/index.php?l=product_detail&p=210

Kevin

Re: rack and pinions [Re: Twostick] #131921
10/26/08 02:44 PM
10/26/08 02:44 PM
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Rio Linda, CA
John_Kunkel Offline
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That Just Suspension kit is a repackaged Unisteer which has gotten poor reviews on this board.


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Re: rack and pinions [Re: John_Kunkel] #131922
10/26/08 09:37 PM
10/26/08 09:37 PM
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Freeport IL USA
poorboy Offline
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If you used a Calivier rack you could make the center rack connection as long as you need to reach the inner tie rod end connection then bolt your 'cudas original tie rod to the center piece. Gene

Re: rack and pinions [Re: poorboy] #131923
10/29/08 07:31 PM
10/29/08 07:31 PM
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Supercuda Offline OP
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Is the Cavalier a rear steer?

If not then I'll have to pass on it. Not real interested in compeletely redoing the front suspension design.


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They say there is always the exception that proves the rule.
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Re: rack and pinions [Re: Supercuda] #131924
10/29/08 11:54 PM
10/29/08 11:54 PM
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Freeport IL USA
poorboy Offline
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Yes, a Cavalier is a rear steer rack.

Here is a picture of a Intrepid rack (same design as a Cavalier rack except its an Intrepid is front steer) with tie rod ends compaired to the stock steering box and tie rods for a 39 Plymouth. Gene

Re: rack and pinions [Re: poorboy] #131925
10/30/08 12:00 AM
10/30/08 12:00 AM
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Freeport IL USA
poorboy Offline
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This is what it looked like under my plymouth. Gene

4781668-39plymouth007.jpg (1056 downloads)
Re: rack and pinions [Re: poorboy] #131926
10/30/08 08:17 PM
10/30/08 08:17 PM
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north of coder
moparx Offline
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gene, how close was the inner pivots of the intrepid rack compared to the inner pivots of the lower a arms ? did you have any bump steer ?

Re: rack and pinions [Re: moparx] #131927
10/30/08 08:50 PM
10/30/08 08:50 PM
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Freeport IL USA
poorboy Offline
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On my Plymouth, the center pivots (attached directly to the rack) were 2" apart at the center (I only had a right and left tie rod assembly with no center link) and went all the way to the steering arm at the spindles. I no longer have the car, but we did drive it about 6,000 miles. Didn't notice any bump steer unless you were doing a sharp turn at low speeds, then you could notice a bit of bump steer. Also, I still had the shocks at factory instalation, which was between the upper and lower control arms. Was intending on moving the upper mount but sold the car first.

There are 2 other minor inconvences you should know about.
1) the car did not turn as sharply as it did originally, I suspect the turning radious was probably 5' larger diamiter then original.
2) at highway speed, 70-75mph, the steering was a bit touchy (I had power steering) What would be a minor in-lane correction at 30 mph would be a 1/2 lane correction at 75. I suspect a pressure regulater on the pump would have solved that problem. (Another thing that was on my list I never got to.)

The picture above your post shows how the rack and tie rods compaired the original box and tie rods as layed out in the car. I used the Cavalier rack (Intrepid is a front steer rack) with the Intrepid tie rods which I shortened to match the length of the original in overall length.
Gene

Re: rack and pinions [Re: poorboy] #131928
10/30/08 09:23 PM
10/30/08 09:23 PM
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north of coder
moparx Offline
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ok, i got it now. cavalier rack/intrepid rod ends. you are probably correct about the pressure regulator on the pump. i remember seeing one of those things once that,i think, was a universal type of regulator, in that you mounted it inline with both hoses. it had an adjuster knob that dialed a controled amount of the pressure side hose back to the return hose. i can't remember if anyone tried that setup and said how it worked.

Re: rack and pinions [Re: moparx] #131929
11/04/08 03:12 AM
11/04/08 03:12 AM
Joined: Dec 2004
Posts: 1,757
levittown pa
fstfish66 Offline
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i have a mustang rack rear steer manual,on my 66 cuda,,modified factory k member,

caviler rack rear steer on my 1940 dodge,its a fat man fab kit,works great,.i had hdy high pressure problems,,sent the GM, mini remote pump to unisteer they put a lower flow valve in it ,and its nice now,,


1966 barracuda prostreeter super charged 340(SOLD)
1940 dodge coupe 241 hemi street rod
2014 ram express hemi 4x4 dailey driver
2015 cherokee
2013 R/T classic
Re: rack and pinions [Re: fstfish66] #131930
11/05/08 10:27 PM
11/05/08 10:27 PM
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Posts: 14,889
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Supercuda Offline OP
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What year is that Stang rack?

I had a 96 Stang and it's a front steer unit. I can;t remember what the fox body ones are, been many years since I messed with a fox body stang.
Thanks


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They say there is always the exception that proves the rule.
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Re: rack and pinions [Re: Supercuda] #131931
04/07/09 02:25 AM
04/07/09 02:25 AM
Joined: Dec 2004
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levittown pa
fstfish66 Offline
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the rack is from an early pinto / mustang style,the most popular rack conversion,,

sorrythe reply took sooo loong,i do not get e mails from this site about topics answered,,i was just reading old topics,killing time


1966 barracuda prostreeter super charged 340(SOLD)
1940 dodge coupe 241 hemi street rod
2014 ram express hemi 4x4 dailey driver
2015 cherokee
2013 R/T classic
Re: rack and pinions [Re: fstfish66] #131932
04/08/09 02:54 PM
04/08/09 02:54 PM
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Rio Linda, CA
John_Kunkel Offline
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Those who are contemplating a front rack installation should study up on The Ackerman Effect.


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Re: rack and pinions [Re: John_Kunkel] #131933
04/08/09 10:21 PM
04/08/09 10:21 PM
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Posts: 14,889
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Supercuda Offline OP
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I don't think anyone said anything about front steer, I know I specifically asked for a rear steer setup.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: rack and pinions [Re: Supercuda] #131934
04/08/09 11:24 PM
04/08/09 11:24 PM
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Freeport IL USA
poorboy Offline
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John, we did not modify the existing outer tie rod location, we only exchanged the type of steering used from a box to a rack.

Were I to do a rack install again, I would make a center link that bolts the the Caviler rack and would use the vehicals original tie rods complete. I believe that would make life a lot easier. The center connection of the Caviler rack has 2 bolts about 2" apart. Make a link that uses both center bolts and extends outward on both sides to where the original cars inner tie rods would connect. Problem solved. Gene

Last edited by poorboy; 04/08/09 11:26 PM.
Re: rack and pinions [Re: Supercuda] #131935
04/09/09 04:00 PM
04/09/09 04:00 PM
Joined: Jan 2003
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Rio Linda, CA
John_Kunkel Offline
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Quote:

I don't think anyone said anything about front steer, I know I specifically asked for a rear steer setup.




The comment directly above mine referred to an early Pinto/Mustang rack which is a front steer.

Some here are referring to rear-mounted racks with the tie rods at the front as "front steer", my comment about Ackerman was about racks that mount in front of the kingpin.

I would refer to the Cavalier as a "rear-mount center steer", a simple "L" bracket can change front-mounted tie rods to the rear and vice versa.

Here's a Cavalier installation I recently completed on a Brand X.

5153749-Lookingup.jpg (2080 downloads)
Re: rack and pinions [Re: John_Kunkel] #131936
04/09/09 06:18 PM
04/09/09 06:18 PM
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Posts: 14,889
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Ah, my mistake. Like I posted above i don't want a front steer rack setup. Too much rework needed to make it happen.

The Cavalier rack looks promising, but stock I gotta think bump steer is an issue?

I suppose a "centerlink" bolted to the rack could be made and that would limit bump steer.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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