Optimal angle for half shafts? Options

[technicalninja]

Is there an optimal angle for Porsche half shafts?

I'm contemplating installing a drive package that will utilize a Boxster 6 speed and wondered what is considered "optimal".

I know 20 degrees is sort of the working limit but wondered what the minimum should be.

I believe having the half shaft perfectly level and at 90 degrees to the drive wheel will tend to wear the joints at a single point.

What should I shoot for?

[Dave_Darling]

The "optimal" at any given time is zero angle.

The angle changes throughout suspension articulation, obviously.

The CVs are under the most stress when the car is performing maximum acceleration. They are under almost zero stress when the car is not moving, and fairly little when the car is at steady-state cruise or under braking.

Under acceleration, the rear end squats.

So, to help the CVs the most you can, you would want the axles to be completely flat (and no fore or aft angle) while the back is squatted down from acceleration.

That's assuming you had absolute freedom to set the angles any way you want, and that axle angle is the only thing you care about. Neither of those assumptions are valid in most cases...

--DD