Coil Springs (specs v build)

[INEOS OG]

 

[Tr182md]

Got this from Eibach regarding the lift springs 1.7 front and 1.2 rear.

Antonio,

The fronts are linear, 200 lbs/in. The rear is progressive, 200-256-428 lbs/in

- Team Eibach

 

[anand]

Got this from Eibach regarding the lift springs 1.7 front and 1.2 rear.

Antonio,

The fronts are linear, 200 lbs/in. The rear is progressive, 200-256-428 lbs/in

- Team Eibach

To match the above chart, this means the Eibach 1.7F/1.2R kit has spring rates of 35N/mm in the front and 35/45/75 N/mm in the rear. This means they are slightly stiffer in rate than any of the OEM options

 

[parb]

Interesting. Makes me consider that option. I said I didn't want to lift the car until the drive shaft problem was solved but maybe I should reconsider. The Ineos black springs are seriously expensive....

 

[anand]

The Ineos black springs are seriously expensive....

This is an absolute fact

 

[Tr182md]

You can calculate the spring rate from the description. First, this 1000lb rear set (and the 500lb rear set E30-34-001-06-02) assume that 200-400lbs has been added to the base weight of the vehicle (skid plates, rock sliders, rack, roof top tent, etc.). With no more load, the rear lifts 2.8” (2.4” for the 500lb version). Then, if you add 1000lbs (cargo, trailer tongue weight, etc.) the rear sags to a 1.4” lift (same 1.4” for the 500lb version).

For the 1000lb set, adding 1000lbs to two springs drops the rear from 2.8” to 1.4”; or 1000lb / 2 springs / 1.4” sag = 500/1.4” = 357lbs/in (likely 350lbs/in) spring rate (assuming that they are linear springs). For the 500lb set… 500lb / 2 springs / 1” sag = 250/1” = 250lbs/in spring rate.

Searching for similar Eibach springs rates of 350 and 250 yields results for many of their products.

That is what i meant by assume. We have the deflection at those two weights. What if you add 400 pounds The rears they have are progressive for all the other lines so i would assume these are as well. So can’t really calculate but i think it probably does not matter. You know it will between those two numbers

 

[Tr182md]

To match the above chart, this means the Eibach 1.7F/1.2R kit has spring rates of 35N/mm in the front and 35/45/75 N/mm in the rear. This means they are slightly stiffer in rate than any of the OEM options

I sort of assume all the aftermarket springs would be stiffer but you know what they say about assume.

 

[Tom109]

I think a HD progressive rear spring sounds perfect. But I wouldn’t want any lift until drive shafts are resolved.

 

[Tr182md]

Problem is if you are not fully loaded it will be very stiff. Like an empty pickup truck. Bit of you have a lot of weight already maybe this will work. My weight is occasional so the airbag might be an idea. I could do the 1.7 lift and see how it behaves adding airbags if needed. I think that would handle the winch and a future bull bar as well as rack and other odds and ends. Might be lugging some extra fuel.