Thread: Astro vans and R&P's

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If you draw a line from the upper inner shaft pivot point, and the lower inner A frame pivot, your inner pivot of the R&P should line up. If not your going to get bumpsteer, the more off it is, the worst the bumpsteer.
When using a R&P from a different car, use one from a steer behind the spindle rack, they are stronger because a steer in front uses the pull of the tires to help power it, and a behind has to push it it's self, so their built stronger.
If you use one from a Caviler type, it has the tie rods mount to the center. That way the arc of the tie rods will have less arc at the spindle arm mount, and cause you less bumpsteer. If you use one from a MM II type rack and it's to wide or to narrow you'll get a smaller arc and it'll cause more bumpsteer.

The arckerman, Unless you change your spindles or bend the tie rod mount, it will not come into play.

(I copied this)
The ackerman is an important requirement for wheels steered around separate axes is that the inside front wheel must turn at a sharper angle than the outside wheel. This is due to the fact that the inside wheel moves through a smaller arc. The difference between the inside and outside steering angles progressively increases as the wheels are turned more sharply (higher lock angles). At the low steering angles typical of highway speeds, differential steering is relatively unimportant.


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