New aligment specs.. still feels vague

Discussion in 'Suspension, Steering and Chassis' started by mbaird, Aug 8, 2018.

  1. mbaird

    mbaird mbaird FABO Gold Member

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    Just got my barracuda aligned to the following specs but the car doesnt feel quite as planted or stable as it should.
    Any recomdations ?

    20180808_090922.jpg
     
  2. '63GT

    '63GT Well-Known Member

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    Too much ride height possibly? If the car does not sit level, (too high in the front) it will feel 'floaty' in the front end. I have seen new gas filled shocks change the ride height too. it takes some time for them to settle down.
     
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    • KosmicKuda

      KosmicKuda FABO Gold Member FABO Gold Member

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      Car looks a little high in the front in your Avatar. I watched my alignment guy adjust ride height by measuring from the bottom of the wheel arch to the deck. That could vary by a half inch. FSM has correct method.
      I used similar specs for my 68 Barracuda and it tracks like a freight train. What kind of tires on the front? Check the tire pressure? Too high? Mine are 215-60x15 radials and I prefer slightly nose down.
       
    • Frnknsteen

      Frnknsteen FABO Gold Member FABO Gold Member

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      Caster and Toe-in look pretty good, but it looks like Camber is positive. I prefer to -.25 to -.75 degrees of Camber. Are all the front suspension and steering components in good shape?
       
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      • Frnknsteen

        Frnknsteen FABO Gold Member FABO Gold Member

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      • ChuckDock

        ChuckDock Well-Known Member

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        LOL, I should probably change its title since it did progress like you mentioned.
         
      • mbaird

        mbaird mbaird FABO Gold Member

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        I do have my ride height set a bit high for tire clearance and stance.. Those slots have the wrong offset so I plan on going back to stock steelies and poverty caps.
        The tires are 215/70 14 Michelins and I might have are inflated to around 39lbs... I meant to bring them down to 32.
         
      • mbaird

        mbaird mbaird FABO Gold Member

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        all components are new.
         
      • 69FBCuda

        69FBCuda Life in the Fast Lane

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        Cowbell, it needs more Cowbell!

        Blue Oyster Cult - (Don't Fear) The Reaper 1976 [Studio Version]cowbell link in description

         
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        • TF360

          TF360 Well-Known Member

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          That's a tall tire you have up front too. Don't know how that help or hurt things
           
        • 69FBCuda

          69FBCuda Life in the Fast Lane

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          Try it on different road surfaces... surface vs highway....crowned vs flat and keep it out of the groove
           
        • Frnknsteen

          Frnknsteen FABO Gold Member FABO Gold Member

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          No worries,... It was a natural progression
           
        • mbaird

          mbaird mbaird FABO Gold Member

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          I had it tracking tighter last year so I think it is the alignment specs .... I put a new motor in it recently and dropped the K-member and suspension out the bottom.
           
        • replicaracer43

          replicaracer43 Old school member

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          Should NOT have positive camber! Needs to be zero or negative a bit, and more positive caster would be helpful. Also, is the rear axle bent? Shouldn't be 1/2 negative back there
           
        • Frnknsteen

          Frnknsteen FABO Gold Member FABO Gold Member

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          That does seem like quite a bit. Mine were off a bit too, but mine were only -.02 degrees on left and -.1 degree on right. .5 degrees of rear camber does seem like a bit more than what could be considered normal. I don't know that worn bearings could even account for that much.

          Could one of the back tires been low? You'd think passenger side would have shown positive camber then.
           
        • mbaird

          mbaird mbaird FABO Gold Member

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          I set tire. pressure high if the car is going to sit idle so it hould have been high if anything.
          New Moser axles and green bearings
           
        • mbaird

          mbaird mbaird FABO Gold Member

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          I used the Skosh chart Street Performance specs..
          I will try the Max Perf. specs and see what that gets me.
          alignment-specifications.jpg
           
        • BigBlockMopar

          BigBlockMopar BigBlockMember

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          Another alignment won't make that much difference.
          At least make sure Camber is negative.

          I would forget all about the nose-high stance and mount some steel wheels in place right away and get the car 'stanced' and aligned properly.
           
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          • mbaird

            mbaird mbaird FABO Gold Member

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            I work at a dealership and one of the techs I know is doing it so we have access to the rack.

            I already have new 15x8 Stealies for the back . Just need to order a few sets of SS radials for the back. 1 set for this car and another for the 4sp Swinger...
             
          • RustyRatRod

            RustyRatRod Just another dumbass. Technical Editor

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            The spec for camber is -.5 to + .5 so Making the camber negative will not have an effect, IMO. Look at the toe. That's in DEGREES. It needs more toe in and it will be fine.
             
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            • brian6pac

              brian6pac Well-Known Member

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              I bet it drifts to the right with those settings
               
            • grimreaper

              grimreaper Cross Member

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              I agree with Rusty. Needs more toe. Shoot for .5 degree neg camber. .60 to .120 toe and keep the caster in the 2.5 to 3 range and you should be good.
               
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              • 72bluNblu

                72bluNblu FABO Gold Member FABO Gold Member

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                Camber spec for what is -.5 to +.5? Because that's not the factory spec, and it's not from the SKOSH chart which is what should be used with radials.

                Camber for radials should be no more than 0 and preferably -.25 to -.5* for a basic street car.

                And the toe is just fine. That .25* of toe works out to .113" of toe in with a 25.9" tall tire like the OP has, which is just under 1/8".

                Again, that toe reading is just under 1/8" toe in when you convert from degrees to inches. It's just fine.
                 
                Last edited: Aug 8, 2018
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                • mvh

                  mvh FABO Gold Member FABO Gold Member

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                  Disagree... camber should not be positive for radial tires. But I think the ride height is a significant issue. I run 215/70-14s with the front DROPPED 1/2 to 3/4 inch from spec.

                  IME 2nd gen. Barracudas are very twitchy on the freeway if they have a nose-up stance -- it's aerodynamics. Get that nose down.

                  I'm curious what .13 degrees works out to in inches of toe... Offhand I would guess it's not that far off...
                   
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                  • 72bluNblu

                    72bluNblu FABO Gold Member FABO Gold Member

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                    Yeah the toe is just fine. It's a little less than 1/8" toe in.

                    Here's a calculator that can be used to convert from degrees to inches of toe. Just needs the tire height and the angle for one tire. It assumes they're both the same angle, so in this case I entered .125* because one side was .12* and the other was .13*.
                    Convert Toe Degrees to Inches
                     
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