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  #11  
Old 07-07-2009, 09:58 AM
Hotchkis Hotchkis is offline
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As a few others have already said, the 2nd Gen already features drastically improved geometry compared to the 1st gen cars. Our new Hotchkis 2nd Gen Lower A-Arms feature repositioned ball joints for increased caster and improved camber curve. Our arms also have a CNC cut billet spring cup that's integrated into the structure of the arm and fully TIG welded for improved rigidity to prevent deflection.

Hotchkis 2nd gen Tubular Upper A-Arms increase caster and camber gain and the offset cross-shaft allows increased static negative camber without a large alignment shim stack.

Here's a video of an '80 T/A with all our parts (TVS, Subframe Connectors and Upper/Lower A-Arms) in action during testing at California Speedway.

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  #12  
Old 07-07-2009, 03:49 PM
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pro-tour79 pro-tour79 is offline
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so, I see "increased camer gains" are the A-arm lengths altered?
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Old 07-07-2009, 04:09 PM
B_Alley B_Alley is offline
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You could also increase Camber gain (in bump) a number of ways with the upper control arms too- shortening or lowering their inboard pickup points. It becomes more complicated when the car goes into roll, but more caster will also help your camber on the loaded tire...
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Old 07-08-2009, 11:39 AM
Hotchkis Hotchkis is offline
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We move the upper ball joints back for more caster. We also shortened the upper arm for a quicker camber curve. We lengthen the lower arm slightly for more static neg camber and less arc during travel. This combination produces excellent neg camber gain as the suspension travels up.

With stock upper and lower a-arms, we are barely able to get -0.5° of camber and +2° of caster with shims maxed out. With our Hotchkis A-arms, we can easily get -3° of camber and +6° of caster with room to adjust.

For street applications, we typically set up then 2nd gens with (-1° to -1.5°) of camber and +5° of caster. For autocross or track we set the camber anywhere from (-2° to -3°) and (+5° to +7°) of caster. These settings vary based on the current modifications that are already done on the car.
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