Driveshaft diffraction angle/ need help

[assassin10000]

CSM Wrote:Do anyone know if the driveshaft has a constructive diffraction angle? Or ist the gearbox input shaft on the same lever as the differential axle.
The point is I have swapped the engine to an F20C and at the moment this angle is about 3,5°. I have doubts that any driveshaft withstand the load!!

You didn't take into account the downward slope of the driveshaft to the rear end, due to the chassis design & suspension setup typical of these cars when lowered.

Typical AE86 motor sit's at 3.5-4 deg nose up. Driveshaft (1-piece) is around 2.5 degrees. So if you match the 3.5-4 deg nose up at the diff you have working angles of around 1-1.5 deg for the u-joints. Which is well within the safe margins.

Andrew