Quote:
Originally Posted by jetbill
Thanks Tom!
As for H&R, I wonder if that's a byproduct of an actual stiffer spring rate of the coil or more contact with the bump stop, as a byproduct of increased lowering.
Springs and HAS on EDC is like a mouse trap for me. I like the car stock , wouldn't mind a slightly stiffer rate with a slightly lowered front.
All to often lowering springs are sitting on factory bump stops at static ride height.
Dinan's philosophy with the HAS on the F80 seemed to be spot on. The key here was following the suggested ride night in the manual and measuring the shock body to bump stop clearances with a tie wrap on the shock shaft.
If EAS can provide this data on the AST's that would be helpful for those who may be concerned with those clearances which could artificially induce more understeer or oversteer based on front to rear clearances.
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Typically, lowering springs will be slightly stiffer to account for the smaller travel amount. It's up to manufacturers to decide up on how much.
On E92/F80, the bump stop is used as part of the dampening process. There's some white papers online posted about this and most likely the same rule applies to G8x.
More on bump stops:
https://www.m3post.com/forums/showthread.php?t=427147