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      01-29-2016, 12:35 PM   #29
fe1rx
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Drives: 135i, 328i, Cayman S
Join Date: Jan 2008
Location: Canada

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Racecar Vehicle Dynamics by Milliken & Milliken (truly great book) describes the function of a soft mount in series with a damper. The technical name for these things is a "relaxation spring", although a Google search won't find you any info on them. In short, they reduce high frequency harshness at some minor expense of wheel control, provided they are appropriately designed. By eliminating the soft OE shock top mount we are accepting a bit more harshness for some potential benefit. I suspect all the urethane upper mounts are functionally equivalent, give or take some nit picking.


Quote:
Originally Posted by titium View Post
Seems like the main benefit of the both comes from the much stiffer urethane bush and not the claimed increased suspension travel (in the dinan case).

So fe1rx what's the verdict powerflex or dinan mounts?
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