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Old 03-24-2008, 08:37 AM
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powerrodsmike powerrodsmike is offline
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Quote:
Originally Posted by 59 el camino
Thanks for the warning Deuce. I have put complete IFS under many cars and all have been ok. I believe that my 59 has a true parallel system and the Ackerman angles are built into the spindles. Looks like something like a Pinto or Mustang 2 would help the bump steer, not make it worse. Thanks again, John


So then you have measured the inner tie rod end ball sockets on the MII rack. And you found that once mounted on your frame and clearing the oil pan and putting the input shaft in a position to accept the steering shaft the centerline of those ball sockets will fall upon the line drawn through the centerline of the upper and lower control arm inner pivots.


Because that is what the tech article from Longacre racing dictates as requirements for minimizing bumpsteer.

Here is the picture from the article..


"looks like something like a Pinto" sounds like a guess to me.


If I were you I'd start by measuring the current suspension, plotting the available points and then start going through various racks and measuring the inner pivot ends. Don't forget that the centerline of those arms inner pivots angle in as veiwed from above as well as from the front.

Find a rack that will put the ends on "line 2 " on that picture. So far there is no list of widths that anyone has posted up here , or anywhere else that I've seen, so hitting the junkyard or auto parts store with a tape measure is where you will be starting..Make sure the rack goes the right direction for where you want to mount it and the input shaft will clear the frame.

You may have better luck with a short rack, mounting it in the front. IIRC the 59 is a front steer car to begin with, so there will be less clearance issues with that one.


There are a couple of members here who are working on R&P installations, here is a thread that has several of them conversing about rack modifications..

Oldred has a good idea with his attaching a bracket to the rack and picking up points of his own for the inner tie rod ends. Total Control does the same thing with their center mounted rack that they use in the early Mustang /Falcon based cars.


http://www.totalcontrolproducts.com/rack.html



Here is the results from a search I just did here on the site, I believe there are many good points made by Iceman36 and oldguy829 in those threads...


Oldguy829 wrote a really really good article and put it in the wiki about his Cavalier rack conversion.




Please read this wiki article
http://crankshaftcoalition.com/wiki/...ing%22_to_Rack

Now all of that being said, I have seen a few aftermarket R&P conversions and one of the main problems besides bumpsteer still being present is that the rack design cuts down on the turning radius. Oldguy829's wiki has some solutions for that problem as well, it may work for your application.

BTW, I'm just going to ignore the "cheap" requirement that you referenced in your first post, (because if I don't there would be no post from me..) You want "cheap", find another hobby.


Hope this helps,

Mikey
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Last edited by powerrodsmike; 03-24-2008 at 08:51 AM.
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