Thread: Coil-Over
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      07-15-2022, 11:37 AM   #10
GuidoK
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Drives: Z4 3.0i ESS TS2+
Join Date: Jul 2012
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Quote:
Originally Posted by F360C View Post

Looking at the front shock towers and the rear shock towers they are both just thin sheet metal though so I am don't know why you can run a coilover in the front but not the rear.
Look at the difference in area on which the load is transferred.
the front top bearings might have a total area that is 4(?) times as large?
I don't think you can compensate for that with just loose platelets put inside the rear shock mounts.
Of course if you're going to weld a new structure it's a different story. But also then you have to know what you're doing, putting too much heat in the panels can weaken them as the original panels are cold pressed.
Even the front support domes without welding can crack in extreme circumstances, so I think the main question is: Why?
Why change the rear spring system? What benefit has the coilover spring compared to the spring between chassis and suspension arm? That last spring can also be changed out for a linear one or one with other characteristics. Witgh much less risk and work/cost.
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Z4 3.0i | ESS TS2+ supercharger | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | Powerflex/strongflex PU bushings | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers/KW camber plates | Sachs race engineering clutch | tons of custom sh#t

Last edited by GuidoK; 07-15-2022 at 11:44 AM..
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