Tuesday, December 9, 2025

Project 996 Road Rallye: Part 11


 Aligning the car after the suspension install requires quite a number of steps.  The 911 features a fairly complex number of suspension components unlike the Lotus.  

We first set ride height on the car.  This proved to be fairly straight forward but did require some back and forth.  Our Elephant Racing kit comes with spacers that reposition the suspension to maintain the correct geometry on a lifted car..  We chose to measure ride height from the bottom of the subframe areas as defined by Porsche.


We've decided to use the USA ride heights as a starting point.  See above.  The spacers provided in the kit require subtrating their height (22mm) from the recommended ride height.

On the rear multilink setup, the camber and toe adjusters are on different links, but changing one absolutely moves the other.  The lower control arm (camber arm) changes the wheel’s lateral position when adjusted.  This movement shifts the toe link’s effective length.  The result: camber changes = toe changes.  The front MacPherson strut has camber adjustment at the lower control arm eccentric.  Changing camber alters the scrub radius and control arm position which slightly changes toe. 

We plan to run the car with this set-up and then experiment with higher ride heights.  Unfortunately the process is much more time consumming on a 911 compared with an Elise!  Fortunately we have a Hunter alignment rack that allows us to experiment...

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