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I'm sure this has been answered, but I can't find what I'm looking for. Apologies for the repetitive topic.
I have HD's and MO33 springs. My ride height is 150mm in front and 132mm in back (this setup was installed by the previous owner). There is plenty of thread to lower the car, so I may have the "extra thread" version of the HD.
I now realize that the ride height was likely set to the lowest setting that would keep the spring taught when uncompressed. I could easily lower the car to my goal of RS+10, but I"m hesitant to let the spring have no pre-load. My thought is that I need a spring that is longer, yet compresses more under the weight of the car.
Would the M030, H&R, or any other set allow the car to be set lower without spring float? Surely everyone with HD's isn't sitting as high as I am.
Thanks for your input,
Josh
Last edited by pilotjosh; 03-24-2015 at 04:16 PM.
Reason: Added Pic
M030 will also float when unloaded. It's really no big deal. When you lower the car the springs will fit back where they should. If you want something that doesn't float, I suggest H&R. They have helper spring that keeps them loaded when the car is lifted. When you lower the car the helper spring fully compresses. The ride is a tad less stiff than M030, IMO. My Eibach springs don't float either.
I am running B6s with H&R 29953s set at RS ride height. Springs hold tension when unloaded.
Exactly the info I was looking for. Thank you sir.
Originally Posted by P-daddy
M030 will also float when unloaded. It's really no big deal. When you lower the car the springs will fit back where they should. If you want something that doesn't float, I suggest H&R. They have helper spring that keeps them loaded when the car is lifted. When you lower the car the helper spring fully compresses. The ride is a tad less stiff than M030, IMO. My Eibach springs don't float either.
I'm really looking for a spring to use with the HD's I have. I assume the H&R with the helper spring your talking about is a full coilover set, right? Whereas the H&R 29953's mentioned above are just a basic spring...
M030 will also float when unloaded. It's really no big deal. When you lower the car the springs will fit back where they should. If you want something that doesn't float, I suggest H&R. They have helper spring that keeps them loaded when the car is lifted. When you lower the car the helper spring fully compresses. The ride is a tad less stiff than M030, IMO. My Eibach springs don't float either.
H&R Sport springs do not use helpers or tenders; they are slightly longer than M030's and progressively wound to prevent the springs from being loose at full droop. Only some H&R Coilovers and of course PSS-10's, use tenders for this reason as well as to provide a dual-rate spring package.
I've found M030 springs to be almost inversely progressive (and still too short for the Bilsteins), thus making a fairly stiff ride for such modest spring rates.
Steve- I used the word helper spring may not be correct but I don't quite know the correct terminology. Let me try to explain better. My reddish/purplish H/R sport springs are longer than my M030. The top several coils are wound much closer together than the rest. When the car is lowered on the ground, those coils at the top would completely compressed. This leads me to believe their purpose are to maintain tension when unloaded.
Here's a pic of the H&Rs. Guess I shouldn't have used the word helper spring but don't know what else to call this type of springs.
That's called a progressive rate spring.
A linear rate spring has a constant force per distance of compression value. E.g. 200 lbs per inch of travel.
A progressive rate spring follows a load curve that changes force as the compressed distance increases. For instance, it could be 50lbs/inch at one inch of compression, and 200lbs/inch at 5 inches of compression.
A linear rate spring has a constant force per distance of compression value. E.g. 200 lbs per inch of travel.
A progressive rate spring follows a load curve that changes force as the compressed distance increases. For instance, it could be 50lbs/inch at one inch of compression, and 200lbs/inch at 5 inches of compression.
I have m030 springs with Bilstein HDs. As stated above, the shocks are "too long for the dampers", so they dont sit like they should when the suspension is unloaded. I did not know this when I got them, I ended up having the dampers modified to hold the spring in place when the wheels are off the ground.
If I did it all over I would just have gone PSS10 since installation, setup and corner weight is expensive enough that the saving in Bilstein HDs instead of PSS10 is not justified.
Also, I'm not too fond of the ride, a bit harsh over slow bumps and not controlled enough when driving hard.
The Bilstein HD's and the H&R springs I find a very good pairing as Steve has mentioned. If you have to have the Porsche parts then you may need to opt for the B8 version meant for sport/shorter springs, but I wouldn't advise it. All depends on planned usage
If you have to have the Porsche parts then you may need to opt for the B8 version meant for sport/shorter springs, but I wouldn't advise it.
The B8 isn't a "Porsche part".
I also would not accept a loose spring condition, forget about even advising against it. Countries where vehicle inspections are taken seriously, would not even pass that.
03-24-2015, 04:10 PM
Bilstein HD Spring Float
