Quote:
Originally Posted by SolsticeMan
I can confirm that C646/C648 are exactly the same for Z0K w/ FE3 and GXP w/ FE3, and the sway bars are also identical p/n. Unless they changed something in the last month.
Front and Rear springs - I have an e-mail in on confirmation, but they are different part numbers. HOWEVER, the only difference is supposed to be in free length/load, and same linear spring rate (FE3 springs (Z0K and GXP/RedLine) (front and rear) : 170 lbs/in and 225 lbs/in).
The Z0K, when properly setup, sits about 1/2" lower than a GXP. (Putting Z0K springs on a GXP would result in a GXP that is even lower yet.)
The 'load' of the spring is not specified in 'free length' as I am used to, it is expressed in a 'check load' at a given height, which I don't exactly know.
It is not out of the realm of possibility that some of the difference felt is the difference in carrying height/center-of-gravity height between a Z0K and a GXP. Changing this changes the, 'roll gradient' and 'load transfer'.
HTH.
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Will confirm what I can of what SolsticeMan has posted, based on the recently released March parts catalog.
The sway bars numbers posted are the correct ones for all 2006-2007 FE3 suspensions. While those are not GM part numbers for the struts, all 2006-2007 FE3 suspension use the same stuts. There is a difference in part number for the springs. The 2006 FE3 and 2007 FE3 Z0K are different then the 2007 FE3 Turbo GT (GTA) spring.
The sits lower parts makes sense as (at least) the 2006 Z0K Solstice was built with a second spring seat for manufacturability and shipping reasons.
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