the working part of the bar, not the spline area.
looking to make my own and need a place to start. there's is to soft so i may step the O.D. up a little or may run shorter arms.
thanks for any info.
steelman

top

Anyone?? I would like to know also!

have you looked into some of the sprint-car
parts places yet? also some of the desert-
racing web sites.

Sherpa

I don't know the exact diameter but I would guess 3/4", perhaps less. I assume the splined part is 1". The swaybar isn't very stiff at all, especially with the long arms they use.

CJ

Looking into this too.

A club member yanked his, and I've been wanting to carbon copy it. <IMG SRC="smilies/wink.gif" border="0">

yooohoooo, Dippstick.....

yep, i am wondering if a toyota torsion bar would work. only problem i have is that the two ends have different splines, so i need part of the A arm that fits one of these. still waiting on the OD of the curry one thogh. i think the toyota were around 20 mm(not sure.....anyone?!?)

I have some sprint car torsion bars but they are hollow (like tubing). Not sure if they'd be beefy enough.

When I built the rear swaybar for my jeep i used Stock Car Products: www.stockcarproducts.com (http://www.stockcarproducts.com)

They offer them in 3/4" to 1-1/8" and in custom lengths, 37.5" is stocked. The stiffness of a swaybar is the diameter to the fourth.


CJ

Cool thanks for the link!! What would be a good bar to start with?? Anyone know how to calculate what rate would be needed?? Anyone know what the Anti-Rock kit costs??

Originally posted by CJ Lagos:
<STRONG>When I built the rear swaybar for my jeep i used Stock Car Products: www.stockcarproducts.com (http://www.stockcarproducts.com)

They offer them in 3/4" to 1-1/8" and in custom lengths, 37.5" is stocked. The stiffness of a swaybar is the diameter to the fourth.


CJ</STRONG>


I remember seeing pics of your TJ here a while ago that showed the bar you made. What Diameter and Length did you use and what length arm (center to center distance). How much movement do you get out of the bar?? How much movement do get out of the suspension with and without the bar?? Thanks..

Ant

swayaway.com, i think they make the torsion bar for the currie kit...

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Hey Ant,

I think my bar is around 39" long or so, I forget the exact measurment. The arms are 13.5" long...I'd prefer longer but they work fine, i thought about getting some custom made.

My first bar was 1-1/16", which is very stiff. My reasoning was that I'd see how that bar worked and since it was stiff, it'd be good for driving around on the street. Then I'd get the smaller diameter bar for the trails. In reality, I could have gotten a softer bar and drilled a new set of holes on the arms but I had to start somewhere.

The 1-1/16" bar gave me 8" of articulation...so I got a 7/8" bar to put in which will give me 16-20". It really depends on where your links attach to the housing too...

Hope that helps, feel free to email me.

CJ

Great, thanks for all the info. It gives me a good starting point. I think I'm gonna start with a 42" long bar 1" diameter. Right now my rig sways a bit to much for the trail and is totally un-streetable.

Ant,

Good deal. They sell tubing that their bushings fit into that the bar slides through. I just made my bar about 2" longer than the width of my frame in the back.

I think you'll really like the swaybar.

I'm building a new frame for my Jeep this winter and I'm gonna put swaybars front and rear...I think I'm going to use a 3/4" up front and in the back use a diameter bar that balances the front and rear suspension.

CJ

Just did some calculations here with a fellow engineer and we came up with a 40" by 3/4" bar yielding around 50 inch pounds of spring with a 12" lever arm. A 3/4" will withstand more than 5,000 lbs of force before breaking with a 12" arm. So now I'm leaning towards a 3/4" bar... can always shorten the lever arm to increase the spring rate. CJ Lagos, can you repost those pics of your rig that show the sway bar set-up?? Tell me more about the sleeve, I know the 3/4" bar uses 1" splined arms and pillow blocks, is the sleeve split down the middle??

http://jeep.simplenet.com/jeep.org/cjl-tj/finished/P1010013.JPG

Ok, can you tell me what coil spring rates you are running on your coil-overs?? The swaybar set up this way was too stiff??

Hey Ant,

Well, it has to do with roll resistance. My swaybar mounts to the axle pretty far out on the tubes. So, the swaybar has to move much more than if it the links were mounted closer to centerline.

The 1-1/16" bar simply would only move enough for 8-10" of articulation, it was too stiff. That was the max movement it saw, it would lift the drooping tire before allowing any more articulation. By reducing to a 7/8" bar, it will move enough to give me around 16-18" of articulation. Since your running a bar about the same length as me, they are decent figures to go by.

All their swaybars use a 1", 48" spline on the ends, that way they have universal arms. They use 1.75" OD tubing, but I forget the wall thickness. You slide the bushings in the end of the tubes, then slide the swaybar through the bushings and attach thte arms.

CJ

after thinking about it i think i will be going with a 37 inch long, 7/8's dia bar with longest arms i can find. 15 inch. i would rather it be to soft than too stiff. i can work with it being to soft. just move the arms back or add another smaller bar in the front.
there are some shops sending some info to me that i will post when i get it. there are some really trick looking Alum. arms that have a steel insert for the spline area that i'm thinking about getting.

so far it looks like i'll have about $250 bucks in it when done.
steelman

Originally posted by steelman:
<STRONG>after thinking about it i think i will be going with a 37 inch long, 7/8's dia bar with longest arms i can find. 15 inch. i would rather it be to soft than too stiff. i can work with it being to soft. just move the arms back or add another smaller bar in the front.
there are some shops sending some info to me that i will post when i get it. there are some really trick looking Alum. arms that have a steel insert for the spline area that i'm thinking about getting.

so far it looks like i'll have about $250 bucks in it when done.
steelman</STRONG>


http://www.stockcarproducts.com/images/s100.jpg

An arm like this?? I'm think'in the same thing, go soft with the rod then just shorten the throw on the arm if I need it stiffer.

Originally posted by Ant:
<STRONG>
http://www.stockcarproducts.com/images/s100.jpg

An arm like this?? I'm think'in the same thing, go soft with the rod then just shorten the throw on the arm if I need it stiffer.</STRONG>

i have seen those and ones that have a 3 inch offset.
there is another shop that makes the sway bars for the front and rear of dirt out laws that have the really trick Alum. ones that have CNC cut outs and they mount the rod in the arm in a double shear mount instead of the single mount with the heim on the side.

around $40 bucks a arm. then the bar is around $90 and then the pillow blocks. i think i'll make the rods. i don't think thats to bad money wise.

i can't beleave all the people that have that Currie sway bar and no one knows what the Dia. is!!!!!

what, did all of you pay some one to put it on?

steelman

There is a review on RockCrawler.com about the Anti-Rock, they say its a 3/4" bar and they use 18" arms!! <IMG SRC="smilies/eek.gif" border="0"> To much arm length if you ask me!

Anyone knows about the heat treatment and/or rockwell hardeness on Currie sway bars?

Originally posted by Gonzalo Bravo
Anyone knows about the heat treatment and/or rockwell hardeness on Currie sway bars?

The currie bars are about 3/4" od, they are made from 4340. They are heat treated like any other 4340 axle/torsion bar through hardened to RC 42-46.

goat i am sorry man but i think your wrong The currie bars are about 3/4" od, they are made from 4340. They are heat treated like any other 4340 axle torsion bar through hardened to RC 42-46. the shop I worked at for 4 years made all the sway bar form boards for Ford motor company the sway bars were made out of 4130 low carbon cromo and were only around 32 RC. Most all your torsion bars are heat treated then stress relived and this is a very costly process to have professionaly done. I would make your sway bars out of Stress proof alloy.

Originally posted by GOAT1


The currie bars are about 3/4" od, they are made from 4340. They are heat treated like any other 4340 axle/torsion bar through hardened to RC 42-46.

Great Goat, thanks.-

Originally posted by MAD MAC
goat i am sorry man but i think your wrong the shop I worked at for 4 years made all the sway bar form boards for Ford motor company the sway bars were made out of 4130 low carbon cromo and were only around 32 RC. Most all your torsion bars are heat treated then stress relived and this is a very costly process to have professionaly done. I would make your sway bars out of Stress proof alloy.

Well, the shop I worked for for 3 years made the sway bars for currie and I designed them. We had in house induction hardening and tempering, but even sending it out to be oven heat treated is no big deal and not very expensive. 4130 is usually heat treated to RC 32, it's not deep hardening like 4340. 4340 should be in the mid 40's, otherwise you have wasted you money on an expensive alloy.

I could not find 4130 here down, is it a waste of money if I do it with 4340 instead?

Originally posted by Gonzalo Bravo
I could not find 4130 here down, is it a waste of money if I do it with 4340 instead?

No, use 4340, 4340 is much better to use than 4130 for that type of sway bar.

Originally posted by GOAT1


No, use 4340, 4340 is much better to use than 4130 for that type of sway bar.

Great GOAT1, I will do so, thanks.-

Originally posted by Gonzalo Bravo


Great GOAT1, I will do so, thanks.-

I just read this on Currie's Web, they say their bars are mede from 4130 steel. What do you think?

The Sway Bar is made of SAE 4130 Heat-treated steel for ultimate strength. This is the same quality used in professional off-road competition. This kit includes all components, bushings, hardware and step-by-step instructions. It is positioned through the front cross member and attaches to the stock mounts on the axle housing on Jeep TJ's.

Originally posted by Gonzalo Bravo


I just read this on Currie's Web, they say their bars are mede from 4130 steel. What do you think?

The Sway Bar is made of SAE 4130 Heat-treated steel for ultimate strength. This is the same quality used in professional off-road competition. This kit includes all components, bushings, hardware and step-by-step instructions. It is positioned through the front cross member and attaches to the stock mounts on the axle housing on Jeep TJ's.

I'm 100% sure there are (or at least were when SAW made them) 4340. That was probably written before they finished developing them and never got changed, they probably don't understand the difference between the two any way.

Goat 1 I know you are a master of metals and all, but I know for a fact that all you major manufactures bars are made from 4130. You have to think of it in the aspect of heat treating heat treat 4340 the same as 4130 and you end up with a very hard peice which in turn is very brittle, granted they are annealed to a point to releive any stress risers but the 4130 is less exspencive and has better qualitys for stress releiving less carbon so less the material will be less brittle.

Originally posted by MAD MAC
Goat 1 I know you are a master of metals and all, but I know for a fact that all you major manufactures bars are made from 4130. You have to think of it in the aspect of heat treating heat treat 4340 the same as 4130 and you end up with a very hard peice which in turn is very brittle, granted they are annealed to a point to releive any stress risers but the 4130 is less exspencive and has better qualitys for stress releiving less carbon so less the material will be less brittle.

I think you are talking about an OEM typ sway bar which is a bent bar with a hole in the end, 4130 would be a good material for that, but we are talking about a Currie anti roll bar which is a straight bar that is splined on each end and needs to take alot more angle than a stock type sway bar. These bars are made just like torsion bars or axles, they see high stress and need a material that will hold up to that. 4340 heat treated to the mid RC 40's is not brittle, that it why is such a good material, it can be deep through hardened to high strength levels and still remain very tough.

some of the smaller bars are the same way they are solid but bent and wil flex a a ton like a rea tj bar for example.

now you guys have confused me as i am looking for some sway bars and was thinking about the curry bars but over $300 a pop ,i could be wasteing my money
if anyone has a set to sell let me know i,m looking for 30" and 40" long bars for the front and rear of my fj40, i have alot of travel 16 in rear 14 in the front but dont want to loose any travel
i,ve posted for prices from alot of the venders but not any replies yet with a price
thanks