Valve spring height... 930 w/ 964 cam
 

Was reading that the valve spring height is supposed to be changed depending on what cam you're running. If I'm running a 964 cam in a 930, what should spring height be?

930 spec is 33.5 +/-0.3mm

34.5 inlet and exhaust

Double check this. I installed my springs per factory, installed the super C2 cam and bent the intake valves due to the spring binding. I ended up getting JB Racing springs and set the springs using seat pressure rather than height, giving me enough clearance.

Isn't the recommended spring clearance (between windings) supposed to be something on the order of .015" at the maximum lift at lobe center?

Hmmm... All things being equal, I would think it may be 2mm longer than stock based on lift, but really don't know how much room is avail between coils on stock setup.

intake exh
930 0.376 0.346
964 0.464 0.426
delta 0.088" 0.080"