denpacc

I've got the S.S. 1.1 lift and forgot to ask if the Land Cruiser coils are progressive. Does anyone know if they are progressive or not? (Apparently they are stock front coils from a LC).

Cheers

xcmountain80

What does progressive mean? As far as coils go I'm on my 2nd set.

Aaron

denpacc

My understanding of what progressive coil springs are is that they get harder to compress the further they are compressed. Meaning that they will compress easily with a little weight in the back, but then as more weight/pressure is applied to the coil it gets harder to compress. At least that is my understanding of what a "progressive coil" spring is about.

If someone can add to what a progressive coil spring is please feel free to do so. I am still learning myself...

Cheers

xcmountain80

I would say they are consistent throughout their cycle, They aren't super hard springs like some of the OME's. You could always just load the rear with a bunch of crap and see what happens I know after and during this trip they sagged about 0.5-0.75".








Aaron

sschaefer3

If you use the correct coils and set it up correctly, they will not sag. They are very high quality coils, if you do it wrong it will be a disaster. The LC coils are not progressive.

jason191918

I believe you are correct. The coil has a smaller diameter at a certain section. Under light load, this smaller diameter will compress first. Once that is bottomed out, the larger diameter part of the coil will begin to compress. The change in diameter is probably gradual, so the spring rate will gradually go up as the load increases. As for the original question, I have no idea. Is the coil all one diameter? I suppose this could be achieved w/ different materials, and not different diameters...not sure tho...

denpacc

Steve I bought the coils from you via the S.S. 1.1 lift, so I am assuming they are the "correct" coils. Just curious as to how much they will sag with my 400+# tongue weight from my trailer. I've got a weight distribution hitch but if I crank it too much it seems to stress out my frame turning sharper, uneven corners, so I didn't overly crank the hitch and tended to get a little bit of a sag in the rear with my old "stock" 4runner coils. Now I have the LC coils in there and you've answered part of my question with regards to LC coils not being progressive. But the question remains, how much sag will I get. (My trailer is in storage so I can't easily test it) Thanks.

And what do you mean "if you do it wrong it will be a disaster"?

Cheers,
Denny

sschaefer3

Not much, from the testing we did. Towing campers and car dollys. For more support, contact Sonoran Steel Directly.