LX 570 Custom Springs? (8 Viewers)

[grinchy]

5x18 125 lb/in

Yeah, I made a mental math error and it’s 18 not 14 in length @AnyMal

 

[grinchy]

Moog5230? 18x4 7/8. 250lb.

 

[highfructose]

Front springs - 8 turns. Assume same gauge as larger rear coil (.5 in), assume 5” width. 154 lb/in (this is provisional)

Seems pretty low.

I assume when I get home I can measure the wire, and hopefully the width too, and refine these assumptions.
(Edit fix assumption on width from 4” to 5”.

I have a set of front springs from a 2021 lx-thinner coil material than the pre 2016’s. I think they reduced the spring rate in 2016 to shift more towards comfort and away from “sport/handling.”

 

[grinchy]

I have a set of front springs from a 2021 lx-thinner coil material than the pre 2016’s. I think they reduced the spring rate in 2016 to shift more towards comfort and away from “sport/handling.”

Amazing! That could be a good data point to help find a OTS replacement.

Can you stand on one and see how far down it compresses? And what’s the uncompressed length? And metal thickness of the wire? And outside width?

 

[highfructose]

Amazing! That could be a good data point to help find a OTS replacement.

Can you stand on one and see how far down it compresses? And what’s the uncompressed length? And metal thickness of the wire? And outside width?

I tried measuring spring rate when I first got them…couldn’t get them to stand up reasonably stable…so the data derived wasn’t repeatable.

Someone had the idea to use a pair of garbage cans w the spring in between…and load weight into garbage cans to see how much weight it took to go down an inch…I don’t have garbage cans like that that would work…

But it occurs to me that a couple 5 gallon buckets might work.

I’ll measure the spring thickness, how many coils there are, plus the width…and I’ll see if a couple 5 gallon buckets can be used to measure the spring rate

 

[grinchy]

Thanks for your efforts!

 

[AnyMal]

Arent the part numbers the same?

 

[highfructose]

Thanks for your efforts!

15mm thick
7 full coils plus one half of a mini one at the top and one flat one tucked pretty close to the first coil at the bottom
129mm (outside of coil to outside of coil)

I tried to measure spring rate w a 5 gallon and 6 (maybe?) bucket, but the spring is too tall.

Probably a pair of metal medium sized garbage cans plus some plywood on top of the spring would work.

 

[grinchy]

15mm thick
7 full coils plus one half of a mini one at the top and one flat one tucked pretty close to the first coil at the bottom
129mm (outside of coil to outside of coil)

I tried to measure spring rate w a 5 gallon and 6 (maybe?) bucket, but the spring is too tall.

Probably a pair of metal medium sized garbage cans plus some plywood on top of the spring would work.

New front spring estimate
7.5 coils 299lb-in
8 coils 325 lb in

How tall is it? 425mm?

 

[Dougal]

So all this long travel success has me thinking about Longer, custom springs.

Rear
We now know the spring constant for the rear two (105, 76). Is a good target 90? And they just need to be 2” longer than the long side (right, us passenger?) (30 to 50mm spacers are being used today)

Front
What would front customs need to do? Longer and stiffer by how much? Between the top hat spacers and prelod collar I’m not sure which actual spring changes could obsolete.

Spring-rates need to match the load and rear springs have to be a faster frequency (firmer spring for the same weight) than the front. Otherwise the back wallows and you get into some ugly handling situations.

If you want to soften the rears to get more flex you need to soften the fronts to maintain ride/handling by the same amount. Use spring length to set ride height.

 

[highfructose]

New front spring estimate
7.5 coils 299lb-in
8 coils 325 lb in

How tall is it? 425mm?

446mm

 

[AnyMal]

Spring-rates need to match the load and rear springs have to be a faster frequency (firmer spring for the same weight) than the front. Otherwise the back wallows and you get into some ugly handling situations.

If you want to soften the rears to get more flex you need to soften the fronts to maintain ride/handling by the same amount. Use spring length to set ride height.

Good to know. Ive only ever increased rates back there.

One thing though is this is for AHC system and ride height is unchanged regardless of the springs. Not until you absolutely butcher things anyway.

 

[grinchy]

446mm

Shoot that’s already 18”. So a longer spring will need to be 19” or even 20”.

 

[grinchy]

5x20 eibach springs look to top out at 200lb. Also they are ‘rear’ and don’t have the small coil to go into the flange, not sure how critical that is yet

 

[MTKID]

Did you perchance measure the fronts when you had them off? For length, width, metal thickness? I’d love to calculate the front spring constant for the LX.

No sorry. I didn’t measure.

 

[grinchy]

Luckily @highfructose came thru!

 

[highfructose]

Shoot that’s already 18”. So a longer spring will need to be 19” or even 20”.

17.6” I think

 

[grinchy]

These are 2.5” longer and 0.15 inches smaller inner diameter. 350 lb in.

Eibach Race Off-Road - Dia. 3.75 in | Len: 20.00 in | Rate: 350 lbs/in

Eibach engineers, manufactures, and sells the highest quality performance aftermarket suspension products in the world.

eibach.com

300 and 350 spring rate available.

Eibach id 2000.375.0350S
Length inches.inner diameter. Spring rate

Also 1800.0375.0300 and 1800.375.0350 (1/2 taller)

 

[highfructose]

These are 2.5” longer and 0.15 inches smaller inner diameter.

Eibach Race Off-Road - Dia. 3.75 in | Len: 20.00 in | Rate: 350 lbs/in

Eibach engineers, manufactures, and sells the highest quality performance aftermarket suspension products in the world.

eibach.com

A range of spring rate’s available

Eibach id 2000.375.0350S
Length inches.inner diameter. Spring rate

So is the idea to keep springs same height but slightly thicker material for increased load? Or longer spring for a lift?

 

[grinchy]

I’m thinking a longer spring is similar to the 20mm coil spacer, but usable for something? But my thoughts aren’t very coherent on this topic. I’m trying to educate myself and learn from the hive too.
Perhaps for ahc it isn’t relevant and spacers are better, I don’t know