rack and pionion steering
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rack and pionion steering
Posted: November 07 2007 01:06 PM
 
Jan Hemsted (aka 41 Kustom) [ View ] [ JLPLY34@aol.com ] [ Car Ads ] [ Blogs ]
Essex, Vermont
 
A freind is building a 38 Chrysler and wants to keep it all mopar. He put a Dakota frontend in but had to narrow it 4 inches, He is now concernded about narrowing the rack. He thinks he will get a lot of bump steer. I don't know of any one who has done this. Any help will be appreciated. Thank you.
 
 
Comments
 
Posted by Crazyhorse Rod Shop  -  11/07/2007 01:26 PM
probably so. the pivot of the lower control arm and the pivot of the tie rods has to be the same or you get bump steer. no way i know of to narrow a rack. best bet would be a half rack maybe.
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by ronhotrod  -  11/08/2007 03:45 AM
might call Fatman as they manufacture a narrow rack for thier Anglia front suspensions that is much smaller than any other I know of. Other choices would also NOT be Mopar.
ronhotrod [ View ] [ Email ] [ Blogs ] [ Car Ads ] Mount washington, Kentucky Charter Member since July 2001
 
Posted by Rods & Customs by Leon  -  11/08/2007 04:06 AM
There is a company called Manvel I believe and they will custom make you rack to your application. I'll see if I can find a link.

Someone here might know where it is if I can't find it
Rods & Customs by Leon [ View ] [ Email ] [ Blogs ] [ Car Ads ] Highlands, Texas Charter Member since May 2004
 
Posted by Rods & Customs by Leon  -  11/08/2007 04:17 AM
The company is Maval......This is a link to their site

http://www.mavalgear.com/
Rods & Customs by Leon [ View ] [ Email ] [ Blogs ] [ Car Ads ] Highlands, Texas Charter Member since May 2004
 
Posted by Willys33  -  11/08/2007 02:18 PM
The rack can be shortened but it's not for the weak of heart. Shine is correct about the position of the lower control arm. Once that is determined, then you must disassemble the rack then take the toothed portion (rack) to a machinest and tell him how much to cut from the LONG end (no teeth) and rethread. The material is special so do NOT try to weld on it or heat it in any way.. Once you have the rack shortened then you can cut the tube and and either reweld or, if you got it apart by pulling the pins then just reassemble the way it came apart. Did it on the Willys and works fine. Can't be done on a power rack.
Get off the trailer and drive [ View ] [ Email ] [ Blogs ] [ Car Ads ] Alamogordo, New Mexico
 
Posted by 31tudor  -  11/08/2007 04:11 PM
I'm certainly no expert, but if the rack is narrowed and the Ackerman Principal adhered to properly, would it still be an issue?
Eric Hibbs [ View ] [ Email ] [ Blogs ] [ Car Ads ] St. George, Utah Charter Member since January 2002
 
Posted by Willys33  -  11/08/2007 08:50 PM
Ackerman, the ole wagoneer basicly said that the inside wheel must turn sharper than the outside wheel. By narrowing the track of the front end it doesn't have any effect on the Ackerman Principal at all as long as the geomertry stays the same (i.e. caster, camber).
Get off the trailer and drive [ View ] [ Email ] [ Blogs ] [ Car Ads ] Alamogordo, New Mexico
 
Posted by 31tudor  -  11/09/2007 12:07 AM
Actually its a little more scientific than that. It has to do with the steering arms of the spindles in relation to the center of the rear end. By aligning correctly, the Ackerman Principal is achieved. I don't know if this would make any difference in bump steer or not though. Just my .02 and food for thought.
Eric Hibbs [ View ] [ Email ] [ Blogs ] [ Car Ads ] St. George, Utah Charter Member since January 2002
 
Posted by 41 Kustom  -  11/09/2007 10:39 PM
Thanks for the input. I contacted my freind today and he is going to log in and check all the responses. He is doing a good job on his Crysler. Its a 38 coupe and a monster. I think it has 3 or 4 body trunk. Its in good shape and will make a nice rod. Thanks again.


41 Kustum
41 Kustom [ View ] [ Email ] [ Blogs ] [ Car Ads ] Essex, Vermont
 
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