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Old 01-18-2008, 05:23 PM
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Rack and pinion center takeoff ? ? ?

Rack and pinion center takeoff ? ? ?

Iím familiar with standard rack and pinion steering and how the ball center of the inner tie rod having to line up with an imaginary line drawn through the upper and lower control arm bushings.
I could do some thinking on it and make a guess how center takeoff geometry works.
But I donít like to guess I like to know, and I donít know much about how center take off R&P works to control bump steer and other suspension geometry in the center like that.

Q: Any one know, or have a web link in mind that explains it?
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Old 01-18-2008, 07:06 PM
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I just did this on two 65 Mustangs and it really was quite simple to do. I removed the tie rods that were attached to the rack (GM "J" car rack) and then made a bracket 18" long from 1/4" plate that bolts to the rack with the original tie rod bolts. Then the inner tie rods were attached to this bracket 8 1/8" out from the center which puts the inner tie rod pivot point in the right place and makes the tie rods the proper length.

Hope I did not misunderstand and that this is what you had in mind.
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Old 01-31-2008, 03:29 PM
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center take off mods

I have an Intrepid front steer center talk off rack and I was thinking about making a bracket like you did that attaches to the center and extends outward. I was worried that there would be too much twisting or torque on the bracket that might bend the bracket or break the bolts that hold it to the rack. Did you have any of those problems?
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Old 01-31-2008, 04:21 PM
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I like Reds idea..i might steal it for my own..sure solves a lot of problems..I think I would make the movable piece out of some heavy tubing to accommodate the forces of thrust that would be encountered..

Great Idea Red

Sam
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Old 01-31-2008, 04:30 PM
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Old 01-31-2008, 05:43 PM
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I stole the idea myself

That's how the "kit" outfits make the GM J car rack work when the aplacation can not use really long tie rods.

Royal, I used 1/4" on mine (not heavy at all it's not that big) but if Steeroids can use that flimsy piece of foil they use for a bracket and make it work it sure must not take much. Also the rack mounting brackets on the Steeroids outfit looks so weak it is just plain scary.
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Old 01-31-2008, 06:09 PM
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We've been doing the Grand Am Rack and pinion conversion on 68-82 Corvettes for years. Check out this link;
http://temp.corvetteforum.net/c3/427v8/c3randp.html

It's a good rack, a little sensitive with the stock Vette pump,but thats easily fixed by throttleing down the pump flow.

I also used 1/4" plate and a bunch of gussets on mine ( more than what is shown). I autocross and don't want any flex.

Steeroids brackets are junk, they have had cracking problems, and they flex significanly.

the only time mine bent was when I hit a curb...

Keith
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Old 02-01-2008, 10:54 AM
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Here's my CTO rack before I Duggized it. Yes Paris, Duggized means I took it apart.You know darlin', I had to narrow it to get it in between the springs.

It's still a work in progress as I also am considering falling back on the Corvair box approach.
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Old 02-01-2008, 10:55 AM
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Hey 427V8- Thanks for the link! It was helpful!
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Old 02-01-2008, 11:14 AM
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For what it's worth, here's a picture of the rack partially disassembled.
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Old 02-05-2008, 09:03 AM
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re: Rack and pinion center takeoff ? ? ?

The Cavalier rack is a center take off (grand am, sunbird, etc) used successfully on many conversions, See the Wiki " swapping to rack and pinion steeriing" "cavalier rack install". for details and pics.
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