LX570 AHC height modifications (lift it!) (46 Viewers)

[TeCKis300]

Handling wouldn't be affected much at all with a mild lift. Certainly wouldn't be worse than what the static lift guys get when they lift 2"+, and there seems to be little discussion about ill handling at those heights. Loss of caster (which affects directional stability) is a concern with too much lift, but with 1.25", he should be just fine.

As with the 100-series and an AHC lift, the next concerns would be maintaining max weight carrying ability at the new neutral height. Because AHC now bears more of the weight load to get to the new height, it potentially has less overall load capacity. Techstream should be able to indicate if neutral pressures are out of spec. The way to return the system to normal pressures is to preload the spring suspension more. Likely that toyota shim talked about for the front, and spring spacer for the rear. 80 and 100 series spacers should work for the rear of the 200.

 

[DeckerT4R]

Is handling affected at all? Do you think you can squeeze 35s now or will it rub on some other part?

I highly doubt the 35's will fit without an aftermarket front bumper or a lot of scrubbing.... i haven't closely inspected it yet though

 

[DeckerT4R]

this is super interesting... I would like to see how things are when the system is in "low" mode, does it still go all the way down? it seems to me like the car is almost on the bump stops when it is in low, i have a bit of a step on my driveway and since i use the "easy access" mode backing up in the mornings, sometimes i hear a sound from the suspension, i wonder if its hitting the bump stop from going down the step. Also want to know if you have any rubbing issues in "Low" mode with those tires.

It is 1.25" higher in ALL modes so its HIGHER in low as well. I didn't have any issues in low with the tires but i rarely use low while moving. Mainly just to help the wife in and out in heels ha

 

[DeckerT4R]

My goal now is to see if we can work with the sensor brackets and get a little more out of it and do 2" spacers front and rear to help carry the load.

 

[Chocolate]

Cool. Any thoughts about what electro posted above?

 

[TeCKis300]

^ That sure sounds like another viable approach to lift. Just physically lift the car to the desired new height, and set that at the zero point/neutral height without moving any sensors. Just a guess of mine, but I think it likely has some tolerance, but not enough to lift 2" alone on it's own. Perhaps combining a sensor lift/and zero point setting will get to a higher lift overall.

 

[DeckerT4R]

I have a lead on some OME 2722 rear springs, which are designed to be a 2" lift for a 200 LC...I think that will support the AHC lift nicely and i was thinking i could get some tundra spacers for the front but i am concerned that the LOW setting won't do anything with that setup because it'll just sit on the springs. Thoughts?

 

[Ali FJ80]

You probably need to hook it up to techstream and see what your pressures are before but I would think the OME springs would limit down travel to whatever the level of the spring is as it's made to support the weight of the truck.

 

[DeckerT4R]

You probably need to hook it up to techstream and see what your pressures are before but I would think the OME springs would limit down travel to whatever the level of the spring is as it's made to support the weight of the truck.

I will order the techstream today. I didn't realize I could actually see those values. Thanks

 

[LX5708]

I wonder if @sleeoffroad hasn't figured all this out. They do have a LX570. Supposedly it has 35 inch tires on it. Were they testing?!?!?

 

[Chocolate]

@sleeoffroad Please provide details.

Would like details on sliders also and any photos, details, or links to anything installed on the truck that you might have for sale.

 

[DeckerT4R]

I wonder if @sleeoffroad hasn't figured all this out. They do have a LX570. Supposedly it has 35 inch tires on it. Were they testing?!?!?

I talked to slee a few months ago and they said they hadn't touched the AHC. They highly recommended i did not run 35's, but seemed to think 34's might be ok, hence my tire size choice. Thy said their truck was scrubbing a lot still and that was with the arb bumper on front with the 35's

 

[TeCKis300]

I have a lead on some OME 2722 rear springs, which are designed to be a 2" lift for a 200 LC...I think that will support the AHC lift nicely and i was thinking i could get some tundra spacers for the front but i am concerned that the LOW setting won't do anything with that setup because it'll just sit on the springs. Thoughts?

You most likely don't want to use OME 2722 springs. They are too high in spring rate for an AHC setup. AHC has be be allowed to carry some significant percentage of the weight, otherwise the setup won't work. The OME springs are designed to carry 100% of the weight themselves, at the lifted height.

Spring spacers are what you want for the rear. That'll give you back stock carrying capacity at the new lifted height. If your intent is to armor up and go really heavy, then you may want to look to the Australia market to see if they have any uprated springs for the AHC setup. They did for the 100-series, which have trickled over to the states recently. Airbags are potentially another viable option. Or even perhaps 80-series springs. Just some carry over ideas from the 100-series land.

 

[DeckerT4R]

You most likely don't want to use OME 2722 springs. They are too high in spring rate for an AHC setup. AHC has be be allowed to carry some significant percentage of the weight, otherwise the setup won't work. The OME springs are designed to carry 100% of the weight themselves, at the lifted height.

Spring spacers are what you want for the rear. That'll give you back stock carrying capacity at the new lifted height. If your intent is to armor up and go really heavy, then you may want to look to the Australia market to see if they have any uprated springs for the AHC setup. They did for the 100-series, which have trickled over to the states recently. Airbags are potentially another viable option. Or even perhaps 80-series springs. Just some carry over ideas from the 100-series land.

Yeah, after more though I agree with you. I told him I'd have to pass.

I'm thinking spacers for now but the plan is slee rear bumper once it's available. I had no idea about AHC aftermarket springs being an option for the future. That's good to know

 

[DeckerT4R]

So does anyone know for sure if 100 series spacers will fit the rear? Also is there such a thing as a 1-1.5" spacer? I'm Sure I can find a 2".

 

[TeCKis300]

Here's a 200-series specific 20mm rear spacer:
SuperPro Coil Spring Spacer Bush SPF3281-20K fits Toyota Land Cruiser 200 Ser...

 

[LCHardriver_02]

With any changes to the AHC, I would recommend getting an alignment. I was playing with mine a while back and very small adjustments on those sensors sent it into a "tizzy"! For a bit, I could not get it to go back down and still had a ton of rake. Having the software adjustments handy is the only way to really get the system to act correctly.

 

[Reckless]

I highly doubt the 35's will fit without an aftermarket front bumper or a lot of scrubbing.... i haven't closely inspected it yet though

Correct me if I am wrong but lifting the LX doesn't make room for a larger tire?

 

[TeCKis300]

Correct me if I am wrong but lifting the LX doesn't make room for a larger tire?

Negative. Nor does it really for the land cruiser either. Most lifts just change the neutral point of where the suspension sits at rest. The suspension still travels through the same stroke when compressed or extended. For example, let's use a number to indicate suspension travel. With 0 at full compression and 10 at full extension. Then stock height is 5. Lifting just changes neutral height to say 7. But it will still travel between 0 and 10 when stroked.

Sure, it may reduce some rubbing as the nominal travel in typical use might use a slightly different range, but when flexed, it still uses the same suspension stroke.

 

[DeckerT4R]

Negative. Nor does it really for the land cruiser either. Most lifts just change the neutral point of where the suspension sits at rest. The suspension still travels through the same stroke when compressed or extended. For example, let's use a number to indicate suspension travel. With 0 at full compression and 10 at full extension. Then stock height is 5. Lifting just changes neutral height to say 7. But it will still travel between 0 and 10 when stroked.

Sure, it may reduce some rubbing as the nominal travel in typical use might use a slightly different range, but when flexed, it still uses the same suspension stroke.

What tire you fit is all dependent upon what sits around it. Right now my front bumper is my limiting factor.

While "lifting" the truck with AHC does basically just change it's neutral point as you mention, this I don't believe is accurate with a traditional suspension. It would all depend on how this "lift" is being achieved. In a spacer style lift I believe you are correct, you're just changing the preload. The range would remain the same.

However, For example I had a 2014 Tacoma with a 3" OME lift and Dakar rear leaf packs. And ran a 33.6" tire. That tire would never fit a stock truck and with new springs you're changing the range of lift.

Just want this clear for future readers. Any engineers are welcome to chime in and say I'm wrong. Ha