Microsoft recommend unlimited growth for temp databases.
Initial size should be 50 MB for all temp dbs with 500MB file growth with unlimited Max Growth. hope it helps
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*Brevity is the soul of wit.