Cranking torsion bars (1 Viewer)

[arbetrader]

Okay, I've heard a lot of hype over this subject, something I don't know much if anything about so can anyone please enlighten me?

1. What exactly does cranking the torsion bars do? My understanding is that it provides a bit of lift, or do I not have that right?

2. Is there a "how to" procedure to perform this?

3. Can I do it myself (I don't even like to do my own brakes, but I have removed my running boards and a few other little things on my own (I know some of you will laugh at that, but I'm a huge LC fan, just not a mechanic, lol) Basically, how easy is this?

4. I have AHC on my LX, will cranking the TB's negatively affect this? Thanks, any input is greatly appreciated!!

 

[Anthony.L]

Think of it as adjusting the spring collar on a set of coil overs. What you are doing is increasing or decreasing the pre-load on the spring (or torsion bar) which causes the ride height to increase or decrease.

As for the effects on AHC, I don't have it, but I'm sure many others will reply with comments.

 

[rusty_tlc]

It's pretty easy as long as you don't have to re-index the T-Bars. But even that isn't all that difficult as long as you pay close attention.

 

[pman]

On an LX you have to be a little careful when adjusting the t-bars. If you are looking for a small lift, then you need to adjust the AHC sensors first, not the T-bars. Once you adjust the senors, then you can adjust the t-bars a little to reduce the pressure in the system. However, if you take off too much pressure.....or leave too much pressure on the system, then the ride and longevity of the components will be affected.

 

[arbetrader]

Is there anybody in the fraser valley, bc that knows how to do this in the correct way with AHC? I'm interested in a little lift, just not too much...

Also, will the travel of the AHC be affected at all by doing this, or will I get the same amount of lift/lowering if it's adjusted in the way that it was explained in the previous post?

 

[RoderickGI]

Think of it as adjusting the spring collar on a set of coil overs. What you are doing is increasing or decreasing the pre-load on the spring (or torsion bar)

Correct.

which causes the ride height to increase or decrease.

No it doesn't give any height adjustment, not on a vehicle with AHC. Changing the spring preload also changes the oil pressure in the AHC.

Pman has it correct. There are some good threads around here on the topic. Try this thread: https://forum.ih8mud.com/100-series-cruisers/363680-ahc-mini-lift.html

 

[Anthony.L]

Correct. No it doesn't give any height adjustment, not on a vehicle with AHC. Changing the spring preload also changes the oil pressure in the AHC.

Yeah, I should have stated my comment was based on non-AHC vehicles and more of how springs and pre-load work in general.

 

[arbetrader]

Okay thanks guys, much appreciated... Is there a good way to check what the pressure is of my AHC system once I've adjusted the sensors, while cranking the TB's? I want to throw on a set of 295's and have minimal-no rubbing...

Thanks for all, and yes, that other thread is very informative!

 

[Anthony.L]

I want to throw on a set of 295's and have minimal-no rubbing...

You can throw 295's on it bone stock and have very minimal to no rubbing...

 

[arbetrader]

You can throw 295's on it bone stock and have very minimal to no rubbing...

Hmm, I guess that's true, but I'm after a bit of the lifted look too!

Anyone here know how many cranks and in what direction I should be cranking for the TB's?

 

[RoderickGI]

Is there a good way to check what the pressure is of my AHC system once I've adjusted the sensors, while cranking the TB's?

If you don't want to buy one of these or something similar, adjust your sensors to get the height you want, then take the truck down to your dealer and have them check the front end alignment and adjust the AHC pressures using the TBs.

You can also check the pressures remotely by measuring the voltage output of the pressure sensor, or similar. Get an FSM and read up on it. Maybe someone here has a PDF version and can post the pages required. I only have a paper version, and my scanner is out of action.

 

[arbetrader]

There's always someone in here that's smarter than me. That's a darn good thing!! Thanks btw, for the info!

 

[Tamerlan]

We got rid of torsion bars at all

Howdy guys,

This is my first post. I would like to tell you how we got rid of torsion bars completely.

We have done a hand-made spring with progressive parameters. Then spring is put on a stock absorber, with easy install procedure. This spring completely replaces torsion bars - no TB pain anymore. Cruiser goes much much better off Russian roads

This is the video link:
YouTube - TLC 100 spring.mpg

Here are some pictures:

Any comments?

 

[Brock]

Mmmm very interesting....would like Slee or someone to get a set of these to test out for us. Seem to work good....what were the springs from? Or were they custom one off?

 

[FullyLitLED]

Mmmm very interesting....would like Slee or someone to get a set of these to test out for us. Seem to work good....what were the springs from? Or were they custom one off?

mos definitely. I think if we got slee to test them, they would sell better. Also, I think a lot of interest are in those springs but some people might enjoy the adjustable nature of a torsion bar

 

[hoser]

When the front suspension is fully drooped, does the spring come into contact with the upper control arm?

 

[spressomon]

When the front suspension is fully drooped, does the spring come into contact with the upper control arm?

It would have to or bump stop it for significantly less travel.



Novel idea and kudos for executing on the idea. But the t-bar issues are really insignificant relative to the front end issues/design compromises that haven't been solved on the IFS 100 platform. Slee's SAS being the exception

 

[Tamerlan]

Yes, these springs are made on a defence equipment. Specially quenched steel.

Here are more pics and some discussion, though in Russian lang:
Ôîðóì ñåòè Toyota4X4.RU -> Ïðîùàéòå,òîðñèîíû.Äîñòàëè âû ìåíÿ.

 

[2000UZJ]

When the front suspension is fully drooped, does the spring come into contact with the upper control arm?

there you go, looks pretty close.

 

[Tamerlan]

Since suspension has only one axis movement, it fits well.

We used technology of 4-barrel marine antiaircraft weapons, so TLC runs very smooth over comb shaped road - resonance has gone