NEED HELP : Rack and pinion Issuse - FFCars.com : Factory Five Racing Discussion Forum

 
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post #1 of 10 (permalink) Old 07-30-2008, 11:52 PM Thread Starter
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NEED HELP : Rack and pinion Issuse

I've read quite a bit that the Mustang rack and pinion being too short for the MKIII Roadster... so without hesitating I installed the supplied tie rod extenders and zip tied the boots back into place & was in the process of putting on the FFR bump-steer kit that I had bought for an upgrade......
Welllllll.....It seems to me that the tie rods are way tooo long , they would even be too long without the extenders !?!?
I bought this power rack & pinion from a Mustang remanufactoring supply house , and I bought it as a 1995 Mustang GT Rack & pinion.. everything else bolted up..... Is there anything I am missing here , and is there any measurments to take to verify that I have the correct R&P ??
Any help is appreciated ........ THANKS !!
Ron

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post #2 of 10 (permalink) Old 07-31-2008, 12:25 AM
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I have a donor rack out of a 90. I would assume the 95 rack to be the same size. I installed the extenders/spacers and found the same issue. I posted this question a while back.

Those That Used A Donor Power Steering Rack..need Help (pics)

I ended up not using them as I would have had to cut the tie rods down and thread more of the rod end. I am still in go kart stage so I cant tell you how it rides with or without them.


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post #3 of 10 (permalink) Old 07-31-2008, 01:25 AM Thread Starter
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Quote:
Originally Posted by nickm1024 View Post
I have a donor rack out of a 90. I would assume the 95 rack to be the same size. I installed the extenders/spacers and found the same issue. I posted this question a while back.

Those That Used A Donor Power Steering Rack..need Help (pics)

I ended up not using them as I would have had to cut the tie rods down and thread more of the rod end. I am still in go kart stage so I cant tell you how it rides with or without them.

Yeah , same here , I just got my kit a couple months ago and am still slowly getting into it.. Hopefully someone on here can give us some "experienced" pointers on this issue..!?!? otherwise I'll follow your lead and take what seems the logical action..? no sense making it longer when it's too long to start with ....
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post #4 of 10 (permalink) Old 07-31-2008, 02:12 AM
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I'm not an expert on this, and I also have only had my kit for a couple months, but i think the concept is to have the inner tie rod pivot points(center to center) and the suspension pivot points as close to the same as possible to avoid bumpsteer. I measured mine, LCA pivot =25", UCA pivot= 29", so I think you want the inner tie rod pivot somewhere in the middle, say 27". It looks like by adding the extensions you would be close to that. Hopfully someone better informed than me will chime in. Jim.
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post #5 of 10 (permalink) Old 07-31-2008, 03:55 AM
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Rod extenders are to help with bump steer. The threaded ends for the outer tierods will have to be shortened. Do a search and you will find a lot of info on this.

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post #6 of 10 (permalink) Old 07-31-2008, 11:10 AM
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The LCAs and the tie rods have to swing on the same arc as the suspension rises and falls during use to lessen if not elimnate the bump steer. The extenders are used to move the pivot point of the tie rods out further to line up with the LCAs pivot point. Just cut the tie rods to fit. The Mustangs are wider not narrower (is that a word?) then the Cobra.

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post #7 of 10 (permalink) Old 07-31-2008, 11:30 AM Thread Starter
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Quote:
Originally Posted by bbk347 View Post
The LCAs and the tie rods have to swing on the same arc as the suspension rises and falls during use to lessen if not elimnate the bump steer. The extenders are used to move the pivot point of the tie rods out further to line up with the LCAs pivot point. Just cut the tie rods to fit. The Mustangs are wider not narrower (is that a word?) then the Cobra.

Are the tie rods longer on a SN95 than a 1993 and earlier Mustang If so, if I bought a set of tie rods from a 1993 and earlier Mustang , how much would I need to cut off of the new (older style) tie rods to be in the ballpark ? Thanks....
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post #8 of 10 (permalink) Old 07-31-2008, 03:54 PM
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http://www.breezeautomotive.com/deta...=281&cat_id=12
Shorter tie rod ends?
Shortening Steering Rack Rod Ends
steering rack questions with pictures
Front End alignment question(tie rod problem)Pics?
Look these over.

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post #9 of 10 (permalink) Old 07-31-2008, 04:02 PM
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http://www.breezeautomotive.com/details.php?prod_id=281

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post #10 of 10 (permalink) Old 07-31-2008, 07:29 PM Thread Starter
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I looked these past two posts over briefly ........ and I realize that they have shorter tie rod ends , but I was wanting to use the "bump-steer" kit I purchased from FFR also ..... I guess I'll just have to experiment on my lengths , and "IF" needed thread the tie rods more....!? WE'LL SEE ??

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