[DeTomaso] Suspension Angles

[Mike Thomas]

If I’m not mistaken, you want no more than about 1/8” of toe-in at the rear.

 

From: michaelsavga at gmail.com [mailto:michaelsavga at gmail.com] On Behalf Of michael at michaelshortt.com
Sent: Thursday, November 20, 2014 5:33 PM
To: Mike Thomas
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Suspension Angles

 

How much wedge are you building in front to rear?

Michael Shortt

On Nov 20, 2014 8:22 PM, "Mike Thomas" <mbefthomas at comcast.net <mailto:mbefthomas at comcast.net> > wrote:

   I've picked up a set of DQ's adjustable upper rear A-arms, and am
   getting ready to install them.  When I fitted the car with the new Koni
   CO's this summer, I dropped the car to the height I was looking for,
   knowing that my rear camber would be quite a bit off.  What I need to
   figure out is how much extension I need to add to the A arm to get to
   the correct camber with half a tank in the car.


   My lower A-arms are virtually level to the ground, I've dropped the car
   about 1/2" from where it was.  I couldn't lower it any more before as
   the alignment shop had to remove all shims from the lower A-am to frame
   connection except what was needed for rear toe.


   I'm assuming that if I know the angle at which the uppers are with the
   lowers level, I could calculate how much to extend the A arm, which is
   at x degrees above the horizontal plane, to push the top of the rear
   tire out Y inches to achieve approximately the right camber.  Then when
   I take the stock A arms off the car, measure center of the buss at the
   frame to the center of the shaft that connects to the upright, I'll
   know how much to increase that dimension to get close enough to the
   desired camber that the alignment shop can fix the rest with shims at
   the lower A arm-to-frame mounting points, including for proper toe.


   I've seen the diagrams of Dallara's suspension design, but does someone
   have that angle, or some other advice on how to set this up?


   Thanks, Mike Thomas

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-------------- next part --------------
   If I'm not mistaken, you want no more than about 1/8" of toe-in at the
   rear.


   From: michaelsavga at gmail.com [mailto:michaelsavga at gmail.com] On Behalf
   Of michael at michaelshortt.com
   Sent: Thursday, November 20, 2014 5:33 PM
   To: Mike Thomas
   Cc: detomaso at poca.com
   Subject: Re: [DeTomaso] Suspension Angles


   How much wedge are you building in front to rear?

   Michael Shortt

   On Nov 20, 2014 8:22 PM, "Mike Thomas" <[1]mbefthomas at comcast.net>
   wrote:

        I've picked up a set of DQ's adjustable upper rear A-arms, and am
        getting ready to install them.  When I fitted the car with the
     new Koni
        CO's this summer, I dropped the car to the height I was looking
     for,
        knowing that my rear camber would be quite a bit off.  What I
     need to
        figure out is how much extension I need to add to the A arm to
     get to
        the correct camber with half a tank in the car.
        My lower A-arms are virtually level to the ground, I've dropped
     the car
        about 1/2" from where it was.  I couldn't lower it any more
     before as
        the alignment shop had to remove all shims from the lower A-am to
     frame
        connection except what was needed for rear toe.
        I'm assuming that if I know the angle at which the uppers are
     with the
        lowers level, I could calculate how much to extend the A arm,
     which is
        at x degrees above the horizontal plane, to push the top of the
     rear
        tire out Y inches to achieve approximately the right camber.
     Then when
        I take the stock A arms off the car, measure center of the buss
     at the
        frame to the center of the shaft that connects to the upright,
     I'll
        know how much to increase that dimension to get close enough to
     the
        desired camber that the alignment shop can fix the rest with
     shims at
        the lower A arm-to-frame mounting points, including for proper
     toe.
        I've seen the diagrams of Dallara's suspension design, but does
     someone
        have that angle, or some other advice on how to set this up?
        Thanks, Mike Thomas
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References

   1. mailto:mbefthomas at comcast.net
   2. mailto:DeTomaso at poca.com
   3. http://poca.com/mailman/listinfo/detomaso_poca.com