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.

 

[Tom D]

I put mine on the weighbridge today. 3100kg total
1480 front and 1600 rear..
A bit more than I was expecting considering it was just me in the truck.
So I have added around 200kg with my Buzz sliders, rear drawer, tools, roof rack, compressor and air tank.

That is effectively my tare weight, i won’t likely be removing anything for a trip only adding more weight.. I still have the new winch bumper to go on so that could easily add 100kg to the front axle. Then there’s the RTT and awning which is not currently on there…
Just as well I bought the camper trailer which will take a lot of weight off the Grenadier when we go on a trip. The rest of the family will add another 200kg so I’ll be close to GVM when fully loaded.

Its definitely going to have to be the black springs or the winch rated lift set.

 

[parb]

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.

I'm thinking the exact same way. The only hesitation I have is the drive shaft issue. But then again I'm at 10k miles without any problem and 1.7" is a very small lift.

 

[Tom109]

Problem is if you are not fully loaded it will be very stiff. Like an empty pickup truck.

I'm thinking the exact same way. The only hesitation I have is the drive shaft issue. But then again I'm at 10k miles without any problem and 1.7" is a very small lift.

This is where a good progressive spring comes in. The lighter rate provides some utility in a near empty vehicle.

To be honest, I’m going to see if I can adjust my loads/use until hopefully better spring options hit the market. Factory black sound good, but to much $.

 

[Tom D]

When I enquired the black were same price as the other ones. About£100 each.

 

[Logsplitter]

When I enquired the black were same price as the other ones. About£100 each.

I think I’ll be looking at the black marked springs once I get the lifting roof conversion and the auxiliary fuel tank fitted. Already my Grenadier seems to sit lower than other Grenadiers when parked next to them.

 

[anand]

When I enquired the black were same price as the other ones. About£100 each.

Here in the US the black rear springs sell for £325/each

 

[Tom D]

Wtf!
I hope my dealer hasn’t miss quoted me.

 

[ADVAW8S]

Wtf!
I hope my dealer hasn’t miss quoted me.

Maybe @anand knows better but I believe Eibach USA makes the springs for the USA. This might be the difference in price.

 

[Tjeska]

Front:

Rear:

Front - no circles? See picture
Rear - Green circles
Market - Belgium
Type - Grenadier Quartermaster 5 seat
Edition - Trailmaster
Seats - Five, heated
Engine - diesel
Winch - yes
Roobar - no
Aux Batt - yes
Wheels - 17" alu with BFG KO2
Towbar - yes
Options: roof windows, led bar with roof bars


Would like to lift the car with the Eibach E30-34-001-06-22 kit but bit unsure because the drivetrain issues...

 

[anand]

Maybe @anand knows better but I believe Eibach USA makes the springs for the USA. This might be the difference in price.

From what I was told all the OEM springs originate outside the US. When I first inquired about pricing sometime around the middle of last year, I was quoted around $150/ea for the springs. When it came time to order in February of this year, the pricing had changed drastically

 

[Skymark]

For those in the US, CAT Scale has weigh bridges in many locations across the country. Setup an online account, download the iOS or Android app and then drive to the location for a mostly automated process (operator inside has to push a button to issue the certificate). It can measure front and rear axle weights (plus total) but cannot measure individual wheels.