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guys - the live rear axle is faster around a track than IRS - that's a fact. The only reason why it was inferior was because of the panhard bar. With a Watts Link, a live rear axle mimics F1 suspension as both wheels contact the pavement at all times around a corner. The IRS is superior for the street where exists road quality variability (ie. potholes), and where you do not want the upsetting of one wheel to affect the other. Such road quality variability conditions do not exist on the track, ergo the live rear axel + watts link is superior to IRS for track and drag applications.
If you read between the lines in track comparisons, reviewers only complain about the Mustang suspension in S-bends, which shows where the panhard bar contributes to instability. This issue would not exist with a Watts Link.
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