100 Series Torsion Bar options (definitive table w/ part nos. and custom pre-order interest) (2 Viewers)

[cruiserpatch]

Howdy!

It's come to my attention thanks to the feedback from some Diesel 100 owners that the AHC HDJ100 torsion bars have been delisted. I'd like to help get some options back on the market for those wishing to upgrade or restore their Diesel 100 Series Land Cruisers (and in the future, for all us petrol owners once our bars go DISCO).

We've just filled our first pre-order of 10x sets of 27mm, 1160mm long UZJ100 w/ AHC 'Cruiser Patch' torsion bars.
We're also currently shipping our first run of 29.5mm, 1160mm long UZJ100 'Cruiser Patch' torsion bars. The following run will be finished in black and will be turned down to 29mm for those wishing to refresh their stock UZJ100.

Pulling a lot of information from these threads:

• Toyota OEM Torsion Bar Spring Rates
• Custom Diameter Torsion Bar

What I'd like to know is this: if I open the floor to pre-orders for some 27mm, 1210mm long HDJ100 w/ AHC 'Cruiser Patch' torsion bars, is there enough interest in some beefier TBs overseas that I should go ahead and get an order going? I'd also LOVE to confirm the diameters and lengths of the OE & aftermarket bars listed below:

Part No. (LH, RH)	Frame	Variant Details	Length	Diameter	% stiffness of OEM AHC bars*	Material	Notes
LH: 48162-60020 RH: 48161-60020	HDJ100	w/ AHC	1210mm	25.5mm	100%	-	Delisted
LH: 48162-60010 RH: 48161-60010	HDJ100		1210mm	-	-	-
LH: 48162-60040 RH: 48161-60040	UZJ100	w/ AHC	1160mm	25.4mm	100%	-	OE U.S. spec w/ AHC
LH: 48162-60030 RH: 48161-60030	UZJ100		1160mm	28.87mm - 29mm**	~167% - ~170%	-	OE U.S. spec
LH: 48162-60080 RH: 48161-60080	FZJ100		-	-	-	-
LH: 48162-60100 RH: 48161-60100	FZJ100	w/ OE winch	-	-	-	-
Ironman4x4: TOY050-100LC	UZJ100		1160mm	32.45mm	~266%	"thick spring steel"	TOY050-LX470 (same part)
X-Sway (formerly Sway-A-Way): 1661	UZJ100		1160mm	32mm	~252%	"Solid aircraft-grade steel, heat treated"
X-Sway (formerly Sway-A-Way): 1660	HDJ100		1210mm	32mm	~248%	"Solid 4340 alloy steel, heat treated"
Old Man Emu (ARB): 303001	UZJ100		1160mm	30.4mm	~205%	"premium grade spring steel"
Old Man Emu (ARB) 303002	HDJ100		1210mm	32.8mm	~274%	"premium grade spring steel"
TJM: 657025	UZJ100		1160mm	32mm	~252%	"premium grade spring steel"
TJM: 657024	HDJ100		1210mm	32mm	~248%	"premium grade spring steel"
Dobinsons: TB59-1600	UZJ100		1160mm	-		"heavy duty"
Dobinsons: TB59-1610	HDJ100		1210mm	-		"heavy duty"
Cruiser Patch: 1661-CP27K	UZJ100	w/ AHC	1160mm	27mm	~128%	"Solid aircraft-grade steel"
Cruiser Patch: 1661-CP29.5K	UZJ100		1160mm	29.5mm	~182%	"Solid aircraft-grade steel"

For those curious how the difference in spring rate is determined, here's our calculations/equation*:

[(TB^4)/(25.4^4)]*100 = % stiffness of OEM AHC 1160mm 25.4mm bar

*metallurgy also determines spring rate. Given the unknowns about each manufacturer's material, these rates are merely estimates.
**some OE non-AHC 1160mm bars have been measured at differing diameters according to mud threads in the past.

 

[TLEXAS]

Hi Patch

Thanks for your efforts in organising the definitive torsion bar specification table and commissioning the build and supply of selected new bars. Torsion bars become a wearable item if you keep your vehicles on the road as long as us Landcruiser fan boys do. You can reindex a few times but eventually there is a degree of metal fatigue that must compromise the functionality of a torsion bar spring.

I enjoy the comfort of a working AHC system on my rig. I have reindexed the torsion bars, replaced the spheres once and fluid twice in the system in 600,000 plus kms so believe that is reasonable for the time and distance travelled. My torsion bars are getting tired and my belief is metal fatigue is compromising their function. I also have an ARB summit bar on the front which adds a little more weight to carry. What I have found recently is that there is no replacement torsion bar available for my diesel AHC equipped Landcruiser (25.5mm x 1210mm) from Toyota, Amayama or PartSouq. All the aftermarket torsion bars are 30-32mm which is too stiff for my AHC equipped rig.

Your special orders currently available for petrol AHC (27mm) and non AHC (30mm) are 1160mm so great for you petrol heads.
Us rolling coal types (diesels) need 1210mm long torsion bars in the following specs AHC (27mm) and non (AHC 30mm)
The 27mm spec for my AHC equipped diesel gives me a little more grunt over the OEM 25.5mm original to account for the extra weight of my ARB bar without going too stiff and compromising my AHC system.

Please receive my confirmation of interest in a set of 1210mm torsion bars at 27mm for my diesel 100 series equipped with a functioning AHC system.

Thank you for your support to the I8MUD community

 

[dstar]

Patch, as a new owner of a 1998 HDJ100L w/o AHC, you have my attention. I am dealing with the discontinued issue with other parts now. Working through it but I am interested.

 

[cruiserpatch]

I've copied this information into a page on our website so folks can view it sans-ads:

100 Series Toyota Land Cruiser & Lexus LX470 Torsion Bar Comparison Ta

100 Series Toyota Land Cruiser & Lexus LX470 Torsion Bar Comparison Table See also the ih8mud thread Part No. (LH, RH) Frame Variant Details Length Diameter % stiffness of OEM AHC bars* Material Notes LH: 48162-60020RH: 48161-60020 HDJ100 w/ AHC 1210mm 25.5mm 100% - Delisted LH: 48162-60010RH...

www.cruiserpatch.com

 

[jim37]

+1 here. I'll express my interest in a set of diesel AHC bars (1210mm x 27mm thick)

Have a 2001 HDJ100R with functioning AHC that is going to be kitted up for a trip from London to Cape Town next year. Planning to keep AHC for the comfort as we will probably see more washboard than hectic trails.

I like the idea of 27mm bars that could take slightly more weight with bumpers/winches installed and also possibly be cranked up a bit in the event of an AHC system failure to keep the car on the road until repairs can be carried out.

Hopefully shipping them to the UK doesn't double the price...

 

[cruiserpatch]

I'll be shipping these in pairs via long, tubular boxes. For example, our 1160mm petrol bars get shipped via a 4"x4"x48" box with a final weight of just under 14kg

The 1210mm will need a slightly larger box but the same principles apply- I'm sure you could go ahead and get some rates calculated to your address using that info^