Author Topic: pst torsion bars  (Read 661 times)

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
pst torsion bars
« on: May 17, 2017 - 07:52:43 pm »
got my new wheels and tires on my 73 cuda. now I need to work on getting the front end lower.  thinking about the pst 1.03 bars.  deluxe kit with new adjusters and a total front end rebuild kit.  is pst a good place to get the front end rebuild kit ??  need to lower the front a minimum of 2 inches from where its at.  rear sits fine by me.







Offline 73_Cuda_4_Me

  • Jr. Member
  • **
  • Posts: 416
Re: pst torsion bars
« Reply #1 on: May 17, 2017 - 08:16:01 pm »
Wow! Surprised how high your front is! I realize you have larger diameter wheels, but if same diameter front and rear, stance should be similar to mine on 14's, just raised by a couple inches...

Just out of curiosity, how much TB adjuster bolt length (from adjuster plate to end of hex head) do you have now? Your front sits really high compared to mine...

Also, how high is front fender lip in wheel opening from floor with tape measure on center of wheel?

I have 1-3/4" adjuster bolt below plate, and fender lip is 24-1/2", with Cooper Cobra 225/70R14 all around... stock front suspension...
1973 Plymouth Cuda BS23H3B567783

R11 V6X EN2
M21 M25 M31 M88 N41 N42
V1X U B41 C56 G37 J54
JY9 A6X9 0 703 501616
E55 D34 BS23 H3B 567783

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #2 on: May 17, 2017 - 08:29:10 pm »
I will have to check . I knew it sat high before I got the new wheels. it may have been raised somewhere in the past.



Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #3 on: May 17, 2017 - 08:37:31 pm »
Fender lip is 27 3/4 on pass side. 27 1/2 on drivers side.  Haven't looked at bars yet

Offline 73_Cuda_4_Me

  • Jr. Member
  • **
  • Posts: 416
Re: pst torsion bars
« Reply #4 on: May 17, 2017 - 09:08:54 pm »
That's pretty high, all right!

I wonder if someone upgraded TB's some time in the past...?

The adjuster screw length will help determine that...
1973 Plymouth Cuda BS23H3B567783

R11 V6X EN2
M21 M25 M31 M88 N41 N42
V1X U B41 C56 G37 J54
JY9 A6X9 0 703 501616
E55 D34 BS23 H3B 567783

Offline HP2

  • Resident
  • *****
  • Posts: 4477
Re: pst torsion bars
« Reply #5 on: May 18, 2017 - 03:10:21 pm »
Do you know you can drop the height by simply adjusting the blade inside the lower control arm? Unlike a coil spring, a mopar torsion bar can adjust its ride height with a regular socket and ratchet. Also, its diameter is an important part of the equation. Do you know what size is under it now? Check that before ordering because there is a chance they have been upgraded previously and installed incorrectly and that is why they sit so high.

Of course if your components are old or shot, then by all means get a rebuild under it

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #6 on: May 18, 2017 - 06:11:00 pm »
I will have to check . I knew it sat high before I got the new wheels. it may have been raised somewhere in the past.


.             Bars are .910.   1 1/4 inch of adj bolt on pass side. About 50 thou less on pass side. Looks like their cranked in compared to yours. I'll adjust them to what you have and see where it puts me. Front end parts are all old so just going to replace everything. Might wait on torsion bars till later.  Just upgrade the shocks for now.

Offline HP2

  • Resident
  • *****
  • Posts: 4477
Re: pst torsion bars
« Reply #7 on: May 18, 2017 - 09:28:56 pm »
Also, the factory measured ride height at the bottom of the torsion bar socket and the bottom of the lower ball  joint. Subtract socket height from  ball joint height, that is your ride height. For an E body, I believe this should measure 1.125" which, IMO, is still too high.

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #8 on: May 18, 2017 - 10:44:54 pm »
I have only had this car for a short time. Haven't had a mopar in 35 years so I have a lot of learning to do but this is a good place for help. I can't do anything about the 30 year old paint just yet but I can get the foundation going. Really a solid car except for the quarters. Just want to get the suspension new and right for a start. I don't build my cars to be babied. I Drive em like they were meant to be. Lol

Offline 73_Cuda_4_Me

  • Jr. Member
  • **
  • Posts: 416
Re: pst torsion bars
« Reply #9 on: May 19, 2017 - 08:00:42 am »
Main thing to remember when adjusting Torsion Bar adjusters... SAFETY FIRST!!!

Loosen lower control arm nuts a turn or two so LCA bushing can pivot (if not rusted tight)

Jack front of vehicle up, and put on jackstands, so that front suspension is fully unloaded (hanging) before adjusting the bolts. They can strip and go flying.

If rusty, soak with penetrating oil for a day or two... I ended up having to torch one of mine out...

I'd start at 2" of bolt below adjusting plate to see how it's going to sit, then set car back down and snug up LCA nuts. Car has to be driven a little for front to settle properly, then check your ride height. Just bouncing it after setting it down won't let suspension settle properly.

Repeat procedures if further adjusting is needed up or down.

I just rebuilt my front suspension - new LCA bushings, new strut arm bushings, and new sway bar bushings... Driver's side LCA bushing was totally shot
1973 Plymouth Cuda BS23H3B567783

R11 V6X EN2
M21 M25 M31 M88 N41 N42
V1X U B41 C56 G37 J54
JY9 A6X9 0 703 501616
E55 D34 BS23 H3B 567783

Offline dodj

  • Sr. Resident
  • ******
  • Posts: 6179
Re: pst torsion bars
« Reply #10 on: May 19, 2017 - 08:40:16 am »
got my new wheels and tires on my 73 cuda. now I need to work on getting the front end lower.  thinking about the pst 1.03 bars.  deluxe kit with new adjusters and a total front end rebuild kit.  is pst a good place to get the front end rebuild kit ?? 
In my opinion they sell good stuff.  I have their 1.03 bars. I run
Main thing to remember when adjusting Torsion Bar adjusters... SAFETY FIRST!!!

Loosen lower control arm nuts a turn or two so LCA bushing can pivot (if not rusted tight)

Jack front of vehicle up, and put on jackstands, so that front suspension is fully unloaded (hanging) before adjusting the bolts. They can strip and go flying.

If rusty, soak with penetrating oil for a day or two... I ended up having to torch one of mine out...

I'd start at 2" of bolt below adjusting plate to see how it's going to sit, then set car back down and snug up LCA nuts. Car has to be driven a little for front to settle properly, then check your ride height. Just bouncing it after setting it down won't let suspension settle properly.

Repeat procedures if further adjusting is needed up or down.

I just rebuilt my front suspension - new LCA bushings, new strut arm bushings, and new sway bar bushings... Driver's side LCA bushing was totally shot
Scott
1973 Challenger  440 4 spd 
2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
Good friends don't let friends do stupid things. ........alone.

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #11 on: May 20, 2017 - 01:18:00 pm »
got the bars roughly adjusted. still have to drive it and fine tune.  drivers side was a b#%^$. heat turn heat turn heat turn. wd 40 just cooled it off and made it harder to turn. pass side was a breeze.  2.100 inch of adj bolt sticking out . 24 inches to fender lip right now. MUCH better.  :cheers:



Offline burdar

  • Sr. Resident
  • ******
  • Posts: 5927
Re: pst torsion bars
« Reply #12 on: May 20, 2017 - 02:25:00 pm »
Much much better. Good job. Now you need larger bars and good(expensive) shocks. I don't think your going to be happy with the ride right now.

When ever you adjust the ride height, you change the alignment. Don't drive it far until you get it checked. You don't want to ruin those brand new tires.

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #13 on: May 20, 2017 - 03:20:59 pm »
I raised it up 1/2 inch. It actually rides pretty well considering the shocks are old as dirt. Got 4 day weekend next week so the front end will be getting rebuilt. Then alignment.

Offline jim.k

  • Jr. Member
  • **
  • Posts: 48
Re: pst torsion bars
« Reply #14 on: May 20, 2017 - 04:26:28 pm »
ordered the pst 1.03 T-bars today. ill probably drive over to Roseville moparts for a front end kit Monday if they have em in stock.