Editing Swapping to rack and pinion steering (section)
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==Bump steer== Changes to the steering arm can affect the steering geometry and can introduce [http://www.longacreracing.com/articles/art.asp?ARTID=13 '''bump steer''']. So, if you are going to address this issue, (some people don’t) do it before the rack install. There are at least two acceptable methods of dealing with this issue. The preferred method is to replace the steering arms with shorter ones. On the '41 Pontiac upgrade covered in the wiki '''''[[1937-1957 Buick Oldsmobile Pontiac suspension upgrade]]''''' the original '65-'70 Chevy steering arms were replaced with a set from a '55-'57 Chevy. [[Image:Chevelle_arm_vs_chevy_arm.jpg|thumb|left|330px|1955-'57 Chevy arm on left; 1965 arm on right]] <br style="clear:both"/> ===Bending or replacing steering arms=== There is a difference in mount width between the BOP arms and Chevy arms, so they won’t work on BOP without the Chevy spindle upgrade. If you are unable to find shorter arms for your application, bending the originals is the next option. You will find mixed opinions on this issue. Some will insist that heating and bending steering arms compromises their structural integrity and should never be done. Others warn you to be sure they are forged and not cast arms. Bending forged arms may be OK, bending cast is not. Others will swear that rodders have been bending arms for decades, with no failures. Please research this issue to your own satisfaction, as to the correct procedures to use to bend the arms and whether safety will be compromised in any event. By putting an "S" bend in the arms they are effectively made one inch shorter, pivot point to pivot point. This also made them one inch lower than the original position. To compensate for this change in geometry, the rack was positioned 1 inch lower than the original center link. A correction could also be made by fabricating the center bracket with a 1 inch drop in the inner tie rod mounting points. However you address it, by doing it ''first'' you will have 3 fixed points to work with: Inner control arm pivot point, lower ball joint pivot point and outer tie rod pivot point. This leaves you with the front/back and up/down location of the inner tie rods to deal with.
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