Suspension springs suggestions needed please!

So what are my options then? From what I understand, the 885's are a lifting spring, not just a stiffer spring. If I was to get OME's and set the shocks @ 0 I will KEEP my lift of 2.5?"

What are the differences between the 885's and the Eibach's spring rate wise? Progressive spring would ideally be a better idea too I would imagine right? I have read the OME's are linears where as the Eibach's are Progressive.

 

Yes , you should get approx 2 1/2" with 885's and 5100's on 0

Eibachs have a stiffer spring rating than 885's but only provide 1.6" lift

 

HOLY CRAP, those 886's are THAT much taller then the stock springs?! Wow, so I could technically run them on the 5100's then at the 0 setting because I am adding no additional preload to them. I just want a spring that is much stiffer then what I have now that will keep me out of the way of rubbing while I'm wheeling. I'm not looking for the holy grail of lifts where the thing is this high speed badass dune buggy.

BUT, if you load them up on the .85 setting (Eibach's) you should theoretically get the equally desired height lift of the 2.5 I would imagine (though I'm not doing any math) and ideally a stiffer spring rate then what they would be if they were set to 0 as well too right?

 

I realized I hit a wrong key in my post , I meant 885's and 5100's at 0 should get you approx. 2 1/2" of lift

 

Loading up the Eibach's to .85 will get me just how much lift exactly?

I still haven't exactly had my question answered of how much the stock TRD springs are capable of (550lb?)

 

I just ordered 884's for my 4 cylinder access cab hoping to get 2.5 with my 5100's at 0"..... should I have ordered 885's?

 

should be close to 3inches with eibachs at .85 setting

 

no, run a 1/4 inch top plate spacer, will ride better as you will have a bit more downtravel

 

The 884's were supposedly made for access cab's due to the fact they are somewhat lighter then double cabs. So that being said I think you are good.

Oh and I found it I think. Stock TRD coil's have a spring rate of 540LB. a 60LB weight increase, plus preloading the coils up a little more should mate up to be a much firmer and much more offroad capable ride

I might just get the Eibach's after all!

 

Ah, so in all reality, setting these suckers, the 5100's to 0 should net me closer to my retained 2.5?"

I just want to toss them on when I get them and not have to worry about an increase in front ride height.

 

1.6 + .85 = 2.45 inches

 

You'll get 1.6" with Eibachs and 5100's at 0 on a DC

 

Very nice



Question:

Being that I am currently running my stock TRD's maxed out to 2.5 on the Billy's and being that the spring rate of a spring goes up the more you preload them what would be a pretty good guesstimate of what my current "spring rate" of the stock springs are at 2.5" compressed if they have a normal unpreloaded spring rate of 540LB's?

How much more would I really be gaining from the Eibach's stiffness speaking wise if they are up 60LB's over stock then compressed to .85?

 

No idea

 

you would have to measure between all the setting points on your 5100s and apply that to your spring choices to find out.

as the spring rates are measured at the spring, but the 5100 lift settings are measured at the wheel. so figure out how far the 2.5 inch lift setting compresses the spring, don't forget to add the preload exhibited on it even at zero. then do the same for the eibachs.

good question but it would be a lot of work to find the answer

edit: thought more about this, if you measure free height of each coil, and then installed, loaded height; you would have your effective ride height rate.

since the eibachs are stiffer, they will sag less than the factory springs. even factory springs set at 2.5 are going to sag (compress) a bit more with the truck's weight, until they reach whichever compressed height it (and associated effective spring rate) takes to support the weight of the truck.

so by my uneducated coil physics, unless you are using progressive rate coils, or you are preloading past the point of allowing some downtravel, both coils will support the natural weight of the truck at the SAME effective spring rate. the difference being that any further up-travel will be stiffer with the higher "lbs coils. . . .so to me, staying within the two "unless" parameters at the top of this paragraph, regardless of preload and resulting ride height, a stiffer spring is stiffer

nother edit: now im wondering about your question in a sense of, if lower spring-rate is preloaded to a point allowing for significantly more up-travel than a higher spring-rate (though I don't think it is possible given our choices in coils and shocks) if by the end of up-travel the lower rate would be effectively higher. . . . CRAP! THIS CHANGES EVERYTHING

 

Just run the 885's on your 5100's @ 0 and call it a day. You will get your 2.5 lift and a better ride since your coils aren't preloaded like now.

 

Thanks for the insight guys. I am going to move on to coilovers with remote resi's. What I should have done in the first place. I like the option of being able to rebuild it! Needless to say, fully built Bilstein 5100's will be on sale in the very near future.