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A body torsion bars? #2722926
12/10/19 12:09 PM
12/10/19 12:09 PM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline OP
I Live Here
justinp61  Offline OP
I Live Here

Joined: Oct 2003
Posts: 11,678
W. Kentucky
Anyone use /6 bars on a street/strip small block A body? It weighed #1740 on the front with a factory block, it now has a R1 block so it's probably a little heavier.

The reason I ask is that the bar on the passengers side seems to have lost it's strength. If I adjust the drivers side it shows up in the ride height on the corners. The passengers side when adjusted moves very little. So I'm wondering if I need /6 bars or 273/318 bars.

Thanks, Justin

Re: A body torsion bars? [Re: justinp61] #2722959
12/10/19 01:50 PM
12/10/19 01:50 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert Offline
Circle Track
Happy Birthday RapidRobert  Offline
Circle Track

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
I used some very thick circle track bars (all I had) on a DD 65 dart SB with 002/003 SS springs (came with the springs as a roller) & it rode flawless


live every 24 hour block of time like it's your last day on earth
Re: A body torsion bars? [Re: RapidRobert] #2723011
12/10/19 03:58 PM
12/10/19 03:58 PM
Joined: Jul 2007
Posts: 1,682
Philadelphia
R
radar Offline
top fuel
radar  Offline
top fuel
R

Joined: Jul 2007
Posts: 1,682
Philadelphia
I did a few different setups on my 72 demon- the solo road race type 1.06 or something cornered flat and gave great road feel even just with KYB shocks but the chassis would outperform the interior- stock bucket seats didn’t hug my butt enough to keep from holding the wheel to keep from getting thrown into the passenger seat. Lotta fun though.

/6 bars with comp 90/10 shocks were also fun- they drove fine for cruising and definitely let the nose come up on a hard launch.

I never did get the car to hook at the track and the one time I threw some 10.5 phoenix slicks on it I shattered the driveshaft and decided feeding parts to a stickshift 1/4 mile car is for somebody with deeper pockets than mine!

Regular v8 bars from the original 1972 H-code 340/4spd setup rode fine but I was into tinkering with the car’s personality.

Re: A body torsion bars? [Re: justinp61] #2723034
12/10/19 05:06 PM
12/10/19 05:06 PM
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
C
CMcAllister Offline
Mr. Helpful
CMcAllister  Offline
Mr. Helpful
C

Joined: Dec 2005
Posts: 11,408
Fulton County, PA
If you're racing the thing and need the car to pitch rotate, a smaller diameter bar, wound up to hold the car at ride height, will help. Good shocks can be used to control the movement. If it's not that serious, I would probably be careful not to get too small with them.

Measuring is the best way to determine what you have. .81 diameter is the drag race only MP bar. .83 is 6cyl, .85 and .87 are 318 & 340 V-8 bars. .89 is a big block bar.

They will get weak and sag. Using scales when adjusting them will help get them right and catch a weak bar.


If the results don't match the theory, change the theory.
Re: A body torsion bars? [Re: CMcAllister] #2723065
12/10/19 07:35 PM
12/10/19 07:35 PM
Joined: Jan 2003
Posts: 20,149
Park Forest, IL
slantzilla Offline
Too Many Posts
slantzilla  Offline
Too Many Posts

Joined: Jan 2003
Posts: 20,149
Park Forest, IL
Make sure you don't have a broken mount. Also, I have the .810" bars in my 340 Duster and I really had to crank the adjusters in to get it to hold ride height.


"Everybody funny, now you funny too."
Re: A body torsion bars? [Re: slantzilla] #2723073
12/10/19 08:06 PM
12/10/19 08:06 PM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
master
Bad340fish  Offline
master

Joined: Jan 2003
Posts: 8,005
Tulsa OK
I am running /6 bars in my 68 Barracuda. It has an R1 Block with W2 heads and a tunnel ram so as far as small blocks go it can't get much heavier. I have probably 6-8000 miles on them and they are still doing good.

Years ago I tried some acid dipped /6 bars my dad had and I couldn't get the jack back out lol.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: A body torsion bars? [Re: Bad340fish] #2723081
12/10/19 08:47 PM
12/10/19 08:47 PM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline OP
I Live Here
justinp61  Offline OP
I Live Here

Joined: Oct 2003
Posts: 11,678
W. Kentucky
Originally Posted by Bad340fish
I am running /6 bars in my 68 Barracuda. It has an R1 Block with W2 heads and a tunnel ram so as far as small blocks go it can't get much heavier. I have probably 6-8000 miles on them and they are still doing good.

Years ago I tried some acid dipped /6 bars my dad had and I couldn't get the jack back out lol.


Thanks, that what I was looking for.

Re: A body torsion bars? [Re: justinp61] #2723163
12/11/19 07:56 AM
12/11/19 07:56 AM
Joined: Nov 2003
Posts: 1,825
NW Indiana
F
fbs63 Offline
top fuel
fbs63  Offline
top fuel
F

Joined: Nov 2003
Posts: 1,825
NW Indiana
6 cylinder bars work great but they have a cycle life like any spring. They wear out. Just replace them.

Re: A body torsion bars? [Re: fbs63] #2723236
12/11/19 01:23 PM
12/11/19 01:23 PM
Joined: Jan 2003
Posts: 5,892
Florida
Locomotion Offline
master
Locomotion  Offline
master

Joined: Jan 2003
Posts: 5,892
Florida
Somewhere I read that the 6 cyl. and 318 bar size goes up one size when they have A/C.


Torsion bar sizes.

Last edited by Locomotion; 12/11/19 01:25 PM.
Re: A body torsion bars? [Re: justinp61] #2723442
12/12/19 12:56 PM
12/12/19 12:56 PM
Joined: Jul 2004
Posts: 19,317
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,317
State of confusion
I ran the .810 bars in my Dart w/a BB for years till they were sagging then my friend grabbed me a pr. of .830-.840 bars iirc from the junk yard and have been running em ever since . 1.33 60 ft and lots of street miles............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: A body torsion bars? [Re: Locomotion] #2723459
12/12/19 01:52 PM
12/12/19 01:52 PM
Joined: Aug 2003
Posts: 4,662
On the parachute mount
N
n20mstr Offline
master
n20mstr  Offline
master
N

Joined: Aug 2003
Posts: 4,662
On the parachute mount
Originally Posted by Locomotion
Somewhere I read that the 6 cyl. and 318 bar size goes up one size when they have A/C.


Torsion bar sizes.



certain year 6cyl with A/C is the same bar as a 318 car .830?


....BAD A$$ STREET CAR.....
Re: A body torsion bars? [Re: n20mstr] #2723474
12/12/19 03:02 PM
12/12/19 03:02 PM
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J Offline
master
Dave_J  Offline
master

Joined: Jan 2003
Posts: 3,122
Auburn WA
My moms 1974 Dart Swinger with a /6 auto air conditioning had the 0.850 bars. I put them in my 65 Cuda when I pulled the 0.089 bars that one was sagging.


Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015


Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.

03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)






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