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Hellwig 1.375 front bar #1214924 04/12/12 05:33 PM 04/12/12 05:33 PM
Joined: Jan 2003 Posts: 31,050 Oregon A AndyF OP I Win
AndyF OP I Win A Joined: Jan 2003 Posts: 31,050 Oregon	I just got a 1 3/8 front bar from Hellwig. It is tube rather than solid so it only weighs 15 lbs. The solid 1.125 bar that I had was 18 lbs. 7162329-bars(Large).jpg (98 downloads)

Re: Hellwig 1.375 front bar [Re: AndyF] #1214925 04/12/12 05:53 PM 04/12/12 05:53 PM
Joined: Nov 2008 Posts: 1,491 Lethbridge, AB, Canada dangina pro stock
dangina pro stock Joined: Nov 2008 Posts: 1,491 Lethbridge, AB, Canada	which car?!

Re: Hellwig 1.375 front bar [Re: AndyF] #1214926 04/12/12 06:59 PM 04/12/12 06:59 PM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	Is that for the old Dodge? You gonna get that thing out and makes some tracks Andy? Mopar to the bone!!!

Re: Hellwig 1.375 front bar [Re: AndyF] #1214927 04/12/12 07:06 PM 04/12/12 07:06 PM
Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A. 5spdcuda top fuel
5spdcuda top fuel Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A.	Thanks for the info Andy. I have a solid bar now and it's definitely porky.

Re: Hellwig 1.375 front bar [Re: AndyF] #1214928 04/12/12 07:52 PM 04/12/12 07:52 PM
Joined: Jan 2003 Posts: 28,068 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,068 Irving, TX	How does the rate compare to the smaller solid bar? When are they going to crank out some Imperial stuff? We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: Hellwig 1.375 front bar [Re: AndyF] #1214929 04/12/12 08:53 PM 04/12/12 08:53 PM
Joined: Aug 2005 Posts: 6,008 Salem Grizzly Moparts Proctologist
Grizzly Moparts Proctologist Joined: Aug 2005 Posts: 6,008 Salem	Nice piece. Love the lightweight stuff, and I sure appreciate it when guys like you post the difference in weight. Mo' Farts Moderated by "tbagger".

Re: Hellwig 1.375 front bar [Re: feets] #1214930 04/12/12 11:37 PM 04/12/12 11:37 PM
Joined: Oct 2004 Posts: 151 Plano, TX 68440fish member
68440fish member Joined: Oct 2004 Posts: 151 Plano, TX	Quote: How does the rate compare to the smaller solid bar? Kevin - a hollow bar is almost as stiff in torsion as a solid bar. The stress is linearly proportional to the distance from the center (at the center it is zero). The spring rate is proportional to the radius to the 4th power. It depends on the wall thickness of the tube. If you know the wall thickness I can do the math, but, just guessing I would say roughly twice as stiff due to the difference in outside diameter. Michael Plano, TX 68 Barracuda Notch Pro Patina

Re: Hellwig 1.375 front bar [Re: Grizzly] #1214931 04/13/12 12:05 AM 04/13/12 12:05 AM
Joined: Jan 2003 Posts: 31,050 Oregon A AndyF OP I Win
AndyF OP I Win A Joined: Jan 2003 Posts: 31,050 Oregon	The Hellwig bar is 1.375 OD with .250 wall thickness. It is 80% stiffer then the 1.125 solid bar, and it is 11% lighter. The bar is for my '65 Coronet. I welded mounts onto my '65 K frame so it would accept this style of anti-sway bar.

Re: Hellwig 1.375 front bar [Re: AndyF] #1214932 04/13/12 01:24 AM 04/13/12 01:24 AM
Joined: Jan 2011 Posts: 4,785 Utah and Alaska astjp2 master
astjp2 master Joined: Jan 2011 Posts: 4,785 Utah and Alaska	Andy, why Hellwig instead of the other hollow bar manufacturers?

Re: Hellwig 1.375 front bar [Re: astjp2] #1214933 04/13/12 02:28 AM 04/13/12 02:28 AM
Joined: Apr 2012 Posts: 1,235 Phoenix, AZ Jjs72D Deep in the closet
Jjs72D Deep in the closet Joined: Apr 2012 Posts: 1,235 Phoenix, AZ	Will this be made for the 73-76 A bodies and 70-74 E body cars?

Re: Hellwig 1.375 front bar [Re: Jjs72D] #1214934 04/13/12 03:09 AM 04/13/12 03:09 AM
Joined: Jan 2003 Posts: 27,471 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,471 So Cal	Quote: Will this be made for the 73-76 A bodies and 70-74 E body cars? Hellwig has them for 73-76 A-bodies. I helped them test fit the prototypes. Took 3 iterations to get a really nice fit. I'm almost sure they have them for E-bodies too. 73-76 A-body. You can not just copy a factory sway bar because of the added diameter puts the dip too close to the inside of the K-member. Also, you need all the room you can get because most 30+ year old K-members are dented which gives you even less space from stock. Stout sway bar mount cross brace. Stout swaybar bushing clamps. Larger than stock end link bushing bolts... 7162970-HellwigFrontSwayBarInstallSm18.JPG (33 downloads)

Re: Hellwig 1.375 front bar [Re: autoxcuda] #1214935 04/13/12 03:22 AM 04/13/12 03:22 AM
Joined: Dec 2010 Posts: 12,375 SoCal MuuMuu101 I got lucky at Woodward!
MuuMuu101 I got lucky at Woodward! Joined: Dec 2010 Posts: 12,375 SoCal	Quote: Quote: Will this be made for the 73-76 A bodies and 70-74 E body cars? Hellwig has them for 73-76 A-bodies. I helped them test fit the prototypes. Took 3 iterations to get a really nice fit. I'm almost sure they have them for E-bodies too. 73-76 A-body. You can just copy a factory sway bar because of the added diameter puts the dip too close to the inside of the K-member. Stout sway bar mount cross brace. Stout swaybar bushing clamps. Larger than stock end link bushing bolts... What's the difference between 73-76 A-bodies and older A-bodies when it comes down to suspension and K-frame and such?

Re: Hellwig 1.375 front bar [Re: MuuMuu101] #1214936 04/13/12 04:08 AM 04/13/12 04:08 AM
Joined: Jan 2003 Posts: 27,471 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,471 So Cal	Quote: What's the difference between 73-76 A-bodies and older A-bodies when it comes down to suspension and K-frame and such? Sorry AndyF for getting off topic. MuuMuu101, I created a new post to answer this new question/topic: https://board.moparts.org/ubbthreads/show...ID=#Post7162985

Re: Hellwig 1.375 front bar [Re: autoxcuda] #1214937 04/13/12 10:11 AM 04/13/12 10:11 AM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	I've got a new Hellwig E-body rear bar in the box if someone wants a pic of it. Mopar to the bone!!!

Re: Hellwig 1.375 front bar [Re: Jjs72D] #1214938 04/13/12 01:34 PM 04/13/12 01:34 PM
Joined: Jan 2003 Posts: 31,050 Oregon A AndyF OP I Win
AndyF OP I Win A Joined: Jan 2003 Posts: 31,050 Oregon	Quote: Will this be made for the 73-76 A bodies and 70-74 E body cars? Not sure I fully understand your question. Hellwig makes tubular bars for almost all Mopar RWD vehicles. They do not make the 1.375 bar for everything though. The 1.375 bar is probably too big to fit inside the K-frame on the later model cars. Besides, with the shorter lever arms most people don't need that big of a bar. Take a look at their website and see if you can find what you're looking for.

Re: Hellwig 1.375 front bar [Re: 68440fish] #1214939 04/13/12 02:04 PM 04/13/12 02:04 PM
Joined: Jan 2003 Posts: 28,068 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,068 Irving, TX	Quote: Quote: How does the rate compare to the smaller solid bar? Kevin - a hollow bar is almost as stiff in torsion as a solid bar. The stress is linearly proportional to the distance from the center (at the center it is zero). The spring rate is proportional to the radius to the 4th power. It depends on the wall thickness of the tube. If you know the wall thickness I can do the math, but, just guessing I would say roughly twice as stiff due to the difference in outside diameter. I am very aware of this. I did not know the wall thickness and that was the reason for the question. We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: Hellwig 1.375 front bar [Re: feets] #1214940 04/13/12 04:21 PM 04/13/12 04:21 PM
Joined: Jan 2003 Posts: 27,471 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,471 So Cal	I have a 73-76 Hellwig 1 1/4" diameter hollow sway bar. Weighs 8 3/4 lbs on a postal scale. 4 3/4 lbs lighter than an Addco 1 1/8 solid bar and only 1 3/4 lbs heavier than a stock bar. FOR 73-76 A-BODY NARROW SWAY BARS ONLY: Weight (lbs) Lbs lighter than 1 1/8" solid Factory 7/8" Solid Sway Bar Weight (lbs): 7 Lbs lighter than solid 1 1/8": -6 1/2 Addco 1 1/8" Solid Sway Bar Weight (lbs): 13 1/2 Lbs lighter than solid 1 1/8": 0 Hellwig Hollow 1 1/8" Sway Bar Weight (lbs): 7 3/4 Lbs lighter than solid 1 1/8": -5 3/4 Hellwig Hollow 1 1/4" Sway Bar Weight (lbs): 8 3/4 Lbs lighter than solid 1 1/8": -4 3/4

Re: Hellwig 1.375 front bar [Re: feets] #1214941 04/26/12 11:14 AM 04/26/12 11:14 AM
Joined: May 2005 Posts: 723 Houston Tx Uhcoog1 super stock
Uhcoog1 super stock Joined: May 2005 Posts: 723 Houston Tx	Quote: Quote: Quote: How does the rate compare to the smaller solid bar? Kevin - a hollow bar is almost as stiff in torsion as a solid bar. The stress is linearly proportional to the distance from the center (at the center it is zero). The spring rate is proportional to the radius to the 4th power. It depends on the wall thickness of the tube. If you know the wall thickness I can do the math, but, just guessing I would say roughly twice as stiff due to the difference in outside diameter. I am very aware of this. I did not know the wall thickness and that was the reason for the question. When discussing with Dave at Hellwig, the difference in wheel rate between a 1 1/4 solid bar and 1 1/4 .250 wall was 390 lb/in vs 370 lb/in (73-76 a body). My math puts the 1 1/4 .188 wall at ~350 lb/in, 1 3/8 solid at 571-583 lb, and 1 3/8 .250 wall at ~542 lb/in wheel rate. All for a 73-76 A body. I'm sure you have them, but if you need the formulas for wheel rates from sway bars using the dimensions of the bar, let me know. Wade -'02 Dodge Viper Ex-World Challenge racecar -'73 Duster, 6.1 based 392 hilborn hemi, tko600, full floater rear 9", Hellwig custom bars, viper brakes, built for road course

Re: Hellwig 1.375 front bar [Re: Uhcoog1] #1214942 04/26/12 03:33 PM 04/26/12 03:33 PM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	Pretty cool and just what we needed: Raw data! Thanks.

Re: Hellwig 1.375 front bar [Re: AndyF] #1214943 05/29/12 03:29 PM 05/29/12 03:29 PM
Joined: Jan 2003 Posts: 31,050 Oregon A AndyF OP I Win
AndyF OP I Win A Joined: Jan 2003 Posts: 31,050 Oregon	BTTT since there is another post here about tubular vs. solid.

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