Off the shelf koni-sports and bilstein sports are valved on production springs at production ride height.
Neither has the compression damping to keep off the bump stops once the car has been lowered, its very noticeable with even a marginal ~20mm drop.
Ideally they’d be re-valved if they’re going on a lowered car,
I haven’t driven Bilstein sports on stock springs but with the amount of crashing (into the jounce stop) I get with H&R sports I wouldn’t be surprised if they still crash with the stock springs at stock ride height on some ride events (frost heaves / patched asphalt)
The aftermarket ride guys are a little gun-shy of the compression damping. I think it has to do with where they are tuned, if they’re tuned on the street the valve code will be very dependant on the surfaces in that area. The guys at Bilstein in SD or Germany might not have the wonderful road conditions that some of us endure.
Neither has the compression damping to keep off the bump stops once the car has been lowered, its very noticeable with even a marginal ~20mm drop.
Ideally they’d be re-valved if they’re going on a lowered car,
I haven’t driven Bilstein sports on stock springs but with the amount of crashing (into the jounce stop) I get with H&R sports I wouldn’t be surprised if they still crash with the stock springs at stock ride height on some ride events (frost heaves / patched asphalt)
The aftermarket ride guys are a little gun-shy of the compression damping. I think it has to do with where they are tuned, if they’re tuned on the street the valve code will be very dependant on the surfaces in that area. The guys at Bilstein in SD or Germany might not have the wonderful road conditions that some of us endure.
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