Hi to all from first time poster.
I was told the some modern 7 and 5 series bimmer's IRS were more or less self-contained unit mounted on a subframe. Anyone got knowledge about those? I knew the old Jag IRS was that way but not a multilink design.
I never seem anyone graft those bimmer IRS on older muscle cars, but the idea sounded interesting if one doesn't have to deal with geometry, mountain point etc.
Anytime you modify suspensions you have to be concerned with geometry. Even though the IRS may be a cradle mounted piece, you will have to consider your track width ( will it work with your car properly without modifying it ), correct installation of the IRS to maintain proper camber gain, pinion angle, anti -squat ect....that would be the basics at a minimum to watch and pay attention to what you are doing. The other thing I would take into consideration is availability and cost of replacement parts... if you are dead set on an IRS and don't have the budget for a performance aftermarket piece like our Fast Track IRS, then I would consider the mustang, T-bird IRS... any way you go it will be some entailed fab work and designing to get it in a chassis not originally designed for it.
I have done some work on an 02 530i including some work on the rear suspension. It is a fantastic setup and I think that it would be well suited for a hot rod swap. The rear suspension assembly hangs on an all aluminum subframe, is easily adjustable (within a relatively small range), rides beautifully and has tons of wheel travel with next to nothing for camber change and toe steer.
I vote yes!
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