You will have to talk to Sharpshooter when he gets back he can tell you the speck weight of the springs. (I believe it is around 26 lbs) I do know that Savage has a variant in spring rate, and they are never to speck. (I know it is much heavier than needed, even at speck.)
On lock time, the reason why it is hardly mentioned is because a Savage has one of the fastest lock times around. It is far faster than a Mauser, or other mass produced gun. There is no need to improve it.
On Wolf springs, One of the biggest complaints of the Savage action is the hard bolt lift. Increasing the spring weight is only going to make the bolt lift harder, and give you nothing in return. I don't believe that Tubbs even offers his speed-lock spring for a Savage anymore.
I am no expert in this area, Hopefully Sharpshooter will chime in in a day or so, and explain it better than I can.