71 camaro suspension geometry graph

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by dale68z, Oct 4, 2012.

  1. dale68z

    dale68z Veteran Member

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    I am using auto wares program to analyze my suspension in my car.
    The car has ptfb upper arms, tall ball joint and B body spindles. It also is riding on 2001 camaro 17X9 wheels with a 1.333" adapter and 275 40 17 tires.
    The alignment specs, 1.75 deg camber, 6 deg caster, 1/16 toe in.

    From this info I will be lowering the camber to prob 3/4, I will also drop off some caster. Because I have all shims in the rear of the arm.
    With the caster drop we will see what the bump steer does.

    Looks like I have a significant camber issue in rebound. The program will help me make decisions on what to do in the corner optimization tab.

    [​IMG]

    ride graph no corner load

    [​IMG]

    ride graph with left turn

    [​IMG]

    My camber, bump, scrub, and roll center curves.

    I left out the caster , it is on another part of the graph

    [​IMG]
     
    Last edited: Oct 4, 2012
  2. z28cp

    z28cp Veteran Member

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    What is the roll angle used here? It looks pretty severe.

    Going off of this image, I can't imagine why you would ever want to reduce the negative camber. It is going from negative to positive already. If anything, I'd want more negative camber at this point.
     
  3. dale68z

    dale68z Veteran Member

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    Here is a better view, it was dramatized in the later view. The one above was nearly 4" comp. at the wheel and 2 inch rebound on the other side.
    You are right the camber in a normal corner will be nearly 0


    [​IMG]


    mid turn, 2 inches of compression and the other corner with 1 inch rebound.
    I have added travel gauges to the shocks today. I will see this weekend what the real shock travel will be. I am just guessing what they will be at this time.
    We will be on a higher speed track, over 110 mph.
     
    Last edited: Oct 5, 2012
  4. 77nomad

    77nomad Veteran Member

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    Ok so for the rest of us. Please explain why and what I'm looking at here. I like that there is a program that can help tune the suspension. If my car ever makes it out to day light I would love to take advantage of the adjustable suspension on it. It is very similiar to yours. I may even swap out the LS fronts on my car to 1LE's.
     
  5. dale68z

    dale68z Veteran Member

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    [​IMG]

    You are looking at a drawing of the suspension viewed from the front. In a left turn. I am guessing how much chassis movement I will have. I guess the right side of the car will roll 2" and the left side will raise 1".
    Yellow is the upper control arm
    red is the lower
    blue is the spindle
    pink is the tie rod
    white is the tire

    In this drawing I have compressed the right side tire 2" and the left side has rebounded 1"

    I can now see what changes have happened from my baseline settings.

    Things of note is the camber change. I am not happy with what I am seeing. In the 1st post I see the camber going crazy negative when I raise that corner. Camber goes positive when I compress that side, but not too bad.
    Bump steer looks ok, I think.

    This is what the front end looks like with no load.
    [​IMG]

    Does anyone know how to figure toe in degrees versus toe in inches?
     

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