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Originally Posted by ZeD4Mr
Status
Fortune Auto
Ast 4150
PSS10 (missed that deal in the classifieds)
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Out of that list, the only ones I can recommend are probably the AST and the Bilstein, as I have driven and ridden in extensively cars equipped from those two companies, or have heard praises from fellow junkies. Although I think the AST one will require some customization to fit the MZ4 right, since you will need to purchase the E36 M3 kit, and both the front and rear damper travel will need to be revised (and I'm still not 100% sold that the E36 M3 rear shocks are a direct bolt-on).
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Originally Posted by ZeD4Mr
I've also heard that a softer or close to equal spring rate for the rear is more desirable for the e85/6 chassis?
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That's a really odd recommendation, and the first I've ever heard of it. Granted I am no expert, logic would dictate that you want to keep the wheel rates as even as possible on a 50/50 distro chassis, and tune the biases one way or another either through alignment, dampers, or swaybars to further neutralize the handling of the chassis. Although, I've also heard of people disconnecting their rear swaybars on OTHER BMW chassis, that in effect is analogous to altering (softening) the wheel rate in the rear but I don't see how that would benefit the MZ4, which, by all accounts, comes from the factory with a propensity to UNDERSTEER.
By softening the rear springs to a point where the front and rear spring rates are equal, you are creating an imbalance in the front/rear wheel rate bias, in essence trying to fix a naturally understeering car by introducing MOAHR understeer.
Does not compute.