How good is the Haynes IRS?

A well set up live axle car will handle as well if not better than one with IRS.

[Talonmotorsport]

Unless it's running on cheap tyres, springs that are too hard, dampers that don't react quick enough and the trailing arms are pointing down instead of up and aiding weight transfer. I think I've spent far too long watching mk2 escorts going round grass tracks.

Go and watch Mk1 and 2 Escorts that have been well and truly sorted that run on tarmac then...aaaaaaawwwwwesomeness sideywaysness and make things like TVR's look pants

IRS is good too though