Looking for some help/recommendations on torsion bars. It's strictly a drag race car. 1973 Plymouth Scamp with a 360 small block. Currently 60' around 1.50 and 1/8th mile around 7.30's. I bent the passenger side torsion bar last weekend. It is a .920 diameter bar. Wondering if that bar is sufficient or what experiences people have with other diameters. Any brands, diameters, experience, ideas would be appreciated. Thank you!

Is this a street/strip car or race only

Race only

Looks like strip only, if so, get the lightest bars you feel you will still have reasonable control at speed.

I'm sure some here can help with that decision, I'm not among those.

Joe

Mopar A-Body Torsion Bar Size and Part Number Reference Torsion Bar Diameter Spring Rate Mopar Performance# OEM # Application
.810″ 90 lb/in p5249148 drag bars
.830″ 100 lb/in 2535888 2535889 slant six bars
.850″ 110 lb/in 2535890 2535891 slant six/318
.870″ 120 lb/in p5249149 2535892 2535893 318 w/air/340
.890″ 130 lb/in p5249150 2535894 2535895 383 standard
.920″ 150 lb/in p5249151 heavy duty handling
.990″ 200 lb/in p5249152 solo/road race
1.040″ 250 lb/in p5249153 heavy duty road race-oval track
1.090″ 300 lb/in p5249154 oval track 1/4 mi–opt.1/2 mi
1.140″ 300 lb/in p5249155 oval track 1/4 and 1/2 mil



.810. Use a good DA shock to control it.

How did you bend a torsion Bar?
Doug

"How did you bend a torsion Bar?"

Was wondering the same thing?

Mike

Just replaced my .830 bars in my A body with .870 bars. The .830 bars were fine with the sb i had, but kept sagging with the current bb i have now.

I've never seen a bent bar.. unless put a torch
to it.. seen plenty of broke ones and broke
a few when I was making F-body bars back in the
day

Maybe I should have said the bar was "fatigued" or "sagging" rather than bent. Thanks for the input so far guys!

If I were you I would pick up drag race bars or
slant 6 bars depending on your total weight

Like any spring, a torsion bar is subject to going soft or loosing its original dimension if over stressed and/or worked repeatedly like a light rate spring that's compressed to store energy.