For a competition only car, certain design parameters can be utilized that may not necessarily transfer well to a street going car. No ackerman, no anti-dive, more or less aggressive camber gain, alternate instant centers, higher or lower roll center location, and more or less scrub radius are all fair game when designing race suspension and steering systems. In a drag car, a number of these can be compromised for straight line performance. in a road race system, some of these parameters need to be enhanced, and for oval, a completely asymmetrical set-up that turns itself will be most productive.
It all varies based on need and is not a case of a one size fits all approach that most of our more knowledgeable and experienced members understand. However, if a rack is simply swapped in for convenience or light weight without understanding the impact of the changes, then unintended results can come about. Like someone else mentioned, Unisteer R&P conversions are a good example an popular idea done in a questionable manner that created more problems than it solved.
