The oem 2016+ front coils appear to be 14.5mm thick and 8 coils tall (including the mini coil at the top but not including the flat one that is sort of doubled at the bottom).
LX 570 Custom Springs? (23 Viewers)
- Thread starter OregonLC
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Concur on the 8 coils. What is the inner diameter (size of the doughnut hole) or outer diameter (from outside edge to outside edge)? With one of those we can figure the theoretical spring rate.
There's a pic of Gen 2 LX570 springs on the 100 forum, the longer rear spring also has 5.25 wraps.
That makes it the same as the shorter one for spring rate.
92 lb/in.
Maybe was a design change for Gen 2 or Gen 3? Speculation at this point. Supposed to be off a 2021.
forum.ih8mud.com
That makes it the same as the shorter one for spring rate.
92 lb/in.
Maybe was a design change for Gen 2 or Gen 3? Speculation at this point. Supposed to be off a 2021.
LX570 AHC Rear Coil Spring Experiment
With my Gamiviti rack coming soon and an expected weight increase to follow I’ve been thinking about coil springs. I’ve decided to test out some LX570 coils to see if this is a viable alternative to Kings as they aren’t exactly cheap and there is often a wait to get your hands on a pair. I’m...
forum.ih8mud.com
ok. so that makes this
Driver - 12.67mm, 168.3mm outer (143mm inner), 5.25 wraps - 105 in /lb
Pass - 12.67, 168.3mm outer (143mm inner), 6.25 wraps - 82 in / lb
So now the driver is exactly the same measured and theoretical at 105 in / lb
Not sure how springs combine, but if it's linearly than the mean of above is 93.5 in / lb between the two.
I've always wondered why the passenger side coil is longer on the factory setup. My current thinking is that the passenger side has more droop capacity because of the panhard geometry. Combined with minor weight differences with the gas tank on that side.
I would think the same thing but the brake lines seemed to limit the articulation more on the passenger side than the driver’s side. Then the interference of the upper link to the gas tank is next. Driver’s side seemed to articulate more easily (each side worked on with the lower portion of shock removed).
If memory serves, the passenger rear is not only longer, it actually has a thinner coil. In other words the driver rear has 5 coils at whatever the thickness of the wire is…the passenger rear has 6 coils but has a thinner wire.
You are correct. I’m at about 12.45 on most of the passenger coil
Pass coil updated to new coil thickness
Pass - 12.45mm, 168.3mm outer (143.4mm inner). 6.25 wraps -> 76 in / lb
Avg now 90 in / lb
You could be right. Although I think the shock really limits a lot of droop on either side. W/o them attached, it was crazy how much more articulation I could get and has me planning on moving the lower shock up to that next hole with a large grade 8 bolt through it as some have already done. Then I’ll adjust the bumpstop down accordingly.I may have it backwards. Will have to noodle on it a bit more.
Changing the mount will do wonders for you!
After a week of rolling on these TTCS-2168 and a set of 50mm coil spacers equaling the total height of the OEM passenger coil, I’d have to say this coil and spacer combo is a great small improvement and not overly stiff or bouncy. (EDIT: almost great 
See my next post…)
This would be one link if someone else wanted to use the spacers along with the factory cone shaped coil bumpstop…
…and I’m not using the factory coil bumpstop so I think I am using what they consider 80 series 50mm spacer…
See my next post…)This would be one link if someone else wanted to use the spacers along with the factory cone shaped coil bumpstop…
Tema4x4 50mm rear coil spacers for Toyota Land Cruiser 200 300 Sequoia Lift Kit | eBay
Toyota Sequoia (XK30/XK40) 2000–2007. Toyota Sequoia (XK60) 2007–2021. Coil Spring Spacers Lift Kit. Toyota Land Cruiser (J200) 2007–2021. Toyota Land Cruiser (J300) 2021–present. 2x Polyurethane coil spring spacers.
www.ebay.com
…and I’m not using the factory coil bumpstop so I think I am using what they consider 80 series 50mm spacer…
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Well, over the weekend, I had the chance to do some more higher speed miles on the Interstate. And when it drops into the faster speed “low” mode, I did experience a more bouncy ride. I switched from sport to normal and to comfort, just trying to see how the suspension was dealing with it in every mode and it was better in Normal and comfort. I would usually use Sport on the interstate, and it felt better after cycling through the other modes when returning to sport mode but still a noticeable difference. Especially noticeable as a difference between the spring rates front to back. So when going over seams, the vehicle seemed to react different front to rear. Front was softer than the rear and the rear seemed under damped.
I have the Westcott front coil spacer and preload spacer that @TeCKis300 recommended on order. We’ll see if that helps match front to rear.
Or ideally, I’d love to just know how to eliminate the high speed low mode! Anyone know if there is someone we could send that little ECU to in order to eliminate that specific function?
I have the Westcott front coil spacer and preload spacer that @TeCKis300 recommended on order. We’ll see if that helps match front to rear.
Or ideally, I’d love to just know how to eliminate the high speed low mode! Anyone know if there is someone we could send that little ECU to in order to eliminate that specific function?
I think 45" tires aught to practically do it.
When was the last time your accumulators were replaced?
What size coil spacers are you running?
Never replaced accumulators, which is in the back of my mind @ 218k miles.
And the size of coil spacer I posted up there
but it’s a 50mm. Admittedly more than anyone else so far on this 2168 coil. However the total height is equal to the OEM passenger coil.I had a bouncy ride that slowly snuck up on me when the truck was about 10 years old (less than 100k miles). Cost like $600 to replace accumulators. Fixed the bouncy ride. Not a difficult job.Never replaced accumulators, which is in the back of my mind @ 218k miles.
And the size of coil spacer I posted up there
From your description, I get the sense that you're oversprung in the rear. Meaning at the lower ride height, that too much of the rig weight is transferred to the physical coil springs. The AHC system is not carrying enough load at that point and unable to impart enough damping. Seems to be what you suspect as well? It's much like a stock LX when kneeling, is unable to provide enough damping, as all the weight is dumped on the coil springs in that mode.
If I had to guess, I'm thinking the uprated rear spring is too much spring rate for your relativley stock weight rig? What you probably are looking for is a taller spring with stockish spring rate. Longer free length to get taller ride height. With lower rate to get slinky long travel?
It's a funny balance between spring free length and spring rate. Each can sometimes be traded to get the desired ride height. They are different things though.
I think you might find more success is using the stock spring, 50mm spacers, and the axle mount relocation. Then optionally airbags. I really like bags because they are a magic component to get adjustable spring rate.
