B/E Torsion Bars

I have been running 6 cylinder torsion bars for about 10 years in my Challenger. The car has a small block and launches pretty good, 1.49 60' times. The car is 3670 lbs with driver. It looks like the torsion bars may be worn out. I was at the track today and noticed have a lot of negative camber. We have only been running 1/8 mile, but today was a 1/4 mile race and the car was a handful at the top end. I cranked up the torsion bars and it helped correct the camber, but by the end of the day there was a lot of negative camber again. Are the race .840 torsion bars still available for b/e bodies? I was not able to find any. What size bars are you guy running?

We run the original 318 bars Looking to get them changed soon. It's an all aluminium RB.
Is the ride height changing? the issue may not be with the torsion bars

If the initial camber was caused by too low of a ride height, and re setting the TB corrected that, and later after more runs, the camber returned, and if you would be able to once again further torque the TB's to eliminate the negative camber, I would say, the TB's have been over stressed, and now are useless and likely dangerous, and/or you need a slightly larger dia TB replacement for the application or one less fatigued from over stress when replacing. ( king of run on )

Wiki:
"Plastic deformation[edit]
See also: Plasticity (physics)
This type of deformation is irreversible. However, an object in the plastic deformation range will first have undergone elastic deformation, which is reversible, so the object will return part way to its original shape. Soft thermoplastics have a rather large plastic deformation range as do ductile metals such as copper, silver, and gold. Steel does, too, but not cast iron..........

Under tensile stress, plastic deformation is characterized by a strain hardening region and a necking region and finally, fracture (also called rupture). During strain hardening the material becomes stronger through the movement of atomic dislocations. The necking phase is indicated by a reduction in cross-sectional area of the specimen. Necking begins after the ultimate strength is reached. During necking, the material can no longer withstand the maximum stress and the strain in the specimen rapidly increases. Plastic deformation ends with the fracture of the material."

Check with Firm Feel. They have an .820 Race TB.

Firm Feel, Inc.
web page

Before you condemn the T bars check all the front end bushings. I've never seen torsion bars "wear out" by losing tension. I've seen them break. Not to say it wont happen, but check all the bushings especially the lower control arms. also check the welds at the mounting points for the bars and control arms. look it over Good things can be hard to see.