coil spring fitment info

[Mugs]

i thought i would post this in case anyone is thinking of swapping suspension coil springs for those from a different year / model.
i have a 1997 1.9 and recently i bought a set of facelift lowered coilsprings that were from a 3facelift 3.0l. i got them for such a good price i thought i would give them a try and see if they fit.
i fitted them today and they fitted perfectly and have lowered the car so it now sits level as opposed to rear end high as it sat when on standard springs.
so it seems the springs for pre-face / facelift and any engine size are the same.

[gookah]

what about the spring rate though to account for different weights and capabilities of the engines?
I think from the larger engine to smaller would not be an issue, but maybe the other way round might be a problem.

[Mugs]

well, i thought about that but if the rates were higher on the 3ltr springs they wouldn't compress as much so they would sit higher?
as it is, the car sits level.
to be honest, i think aftermarket springs are made to a budget so i don't think the rates come into play - i think they make 1 rate across the range.
i think genuine BMW springs may have different rates but i'm not sure.
it seems to handle well so i'm happy