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      12-01-2020, 10:45 PM   #76
filtercoffee
I like Coffee & Z4s.
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Drives: 2007 Z4MC
Join Date: Feb 2019
Location: New York, NY

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2007 BMW Z4MC  [0.00]
100% agree with you on looking at the whole system.

Nice work modifying the H&R coils. I see your bump stop is pretty beefy. The FA bump stops are comically short. They're like 1/2in rubber pucks (not a measurement, just from my memory) which I assume was to give more travel. They're probably just there to prevent the shock from breaking on impact. I've bottomed out very hard and the shocks show no sign of damage.

Since I'm in New York, I didn't lower the front much, since I did not want to reduce travel.

My valving is digressive since I have the "MSC" coilovers from FA which go softer at high speed. This is a contributing factor to why I'm bottoming out on large bumps. I'm not considering changing my shocks at this point since the ride is comfortable for the most part, I don't have the harshness issue you had with H&R.

Will see if I can get more info from DaveJB on the rationale for FA's recommendation here with the longer spring.

Update: The FA coilovers ride height adjustment is via the bottom of the shock body, so that wouldn't affect shock travel (w.r.t. "Keep in mind that the moment you lower the car ANY amount")

Last edited by filtercoffee; 12-01-2020 at 10:55 PM..
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