KeleIS250

I was just wondering, if these springs will settle down more? I heard that they will go down .2 inches once they have "Broken in". Just wondering because I hope I don't start rubbing once I go lower. I already have a minor rub on bumps and on full load.

Here's some pics:
If you seen these pictures already, sorry these are the only ones I have as of right now.

Thanks


By keleis250 at 2012-05-28


By keleis250 at 2012-05-27


By keleis250 at 2012-05-27

mex lex

iTrader: (4)

Yeah if they are brand new springs they will settle, I'd give it about a week and see if it made any difference. I'm assuming the fronts are rubbing on the fender liner?

KeleIS250

Yeah, buts its not that bad actually. It doesn't make a mark on the tire of on the fender liner. Once It does though I will push it in.

mex lex

iTrader: (4)

Yeah I would just make sure the front wheels are straight as possible when you are going over bumps, going up driveways, etc. Eventually the liner will just wear away where the tire rubs it and it will stop rubbing.

Kurtz

iTrader: (1)

despite it being a common myth, properly installed springs do not "settle"... they're solid metal, what could possibly be settling in the spring? Eibach even addresses this in their FAQ-

did you reset the bushings? If not they'll deform a bit which some folks will confuse as the springs settling.


How to do the bushings here:
https://www.clublexus.com/forums/5811432-post8.html

SCWB

^^
I don't know. My stock IS suspension did settle. It went lower by it's own about .2 inches a few month after I bought it (brand new).....Spring usually settles and so do the rubber bushings. They have what we called cyclic load fatigue characteristic that, after a certain period of load cycles, they just deformed or compressed or distorted or whatever. And it will affect the vehicle ride height.

Kurtz

iTrader: (1)

Again- the rubber bushings can deflect, especially if you don't reset them properly when doing the install.

The springs can't.

Here's Lance telling folks the same thing-
https://www.clublexus.com/forums/4713653-post50.html

The lexus service manual says the same, as mentioned here:
https://www.clublexus.com/forums/3715907-post4.html

See also:
https://www.clublexus.com/forums/5126724-post21.html

or

https://www.clublexus.com/forums/5126746-post22.html

Here's Eaton who makes coil springs-
Regarding deformation-
http://www.howeverythingworks.org/page1.php?QNum=1438

Some of the math behind springs-
http://curricula2.mit.edu/pivot/book...l?acode=0x0200

They even use a vehicle coil spring in one of their examples.

In short though a properly made coil spring should be elastic, and return to its original height, unless it's pushed beyond its limits (which it sure shouldn't be in anything resembling normal driving)


When you have the car in the air and don't have weight on the springs, then lower the car to put weight on them, you'll get a very small change.

But that change doesn't take long.

I mean like after a couple miles of driving (or just letting it sit on the weight for a few minutes).

After that the suspension height shouldn't be changing further due to springs "settling"

That's Hookes law... which governs steel springs...

http://en.wikipedia.org/wiki/Hooke%27s_law

Notice how they specify it behaves that way in application, not just in textbooks.

You should only experience non-elastic deformation if you exceed the yield strength of the material.

Regarding elasticity-
A material is said to be ELASTIC if, when deformed by an applied force, it returns to its original shape when the force is removed. There are many familiar examples of this, such as a steel springs

RESILIENT materials are those that can absorb large stresses before they deform plastically. Coil springs are examples of this.

So while there is likely some range of physical stress you could subject a steel coil spring to that will cause plastic deformation, it should (on a quality spring) be well beyond the normal stress you would put on it in street driving.

hence the notion of "just drive it for a week or two to let it settle" is nonsensical... the only permanent change you would ever see would be if you pushed the spring well beyond its intended limits.



and if none of that is good enough I just quoted you directly from the people who make the F-sport springs (eibach) explaining they don't settle.

topspeed55

That's lowered on F-Sports? No way mine are much lower than yours in the front. I have 19's too and the fronts have almost no wheel gap and the rears looks the same. Did you reset/preload your bushings?

Dr3wSaL

^OP has awd.. I'm assuming you have a rwd?

Silver10

Looks better then 4X4 but still looks like a stock RWD now.... CV1's FTW

topspeed55

Oh ok makes sense now, didn't notice he had AWD. Yes, I have RWD and there is barely a finger gap in the front but the the rears looks similar.

Dr3wSaL

Haha OP is also a SHE