I am looking for answers in terms of timing and impact conditions (as opposed to just clubhead speed).
If I remember correctly, True Temper's Dynamic shaft flexes overlap. So, an S-500 is stiffer than an X-100. The X-100 and S-400 are the same flex but with different kick points. The X-100 has a higher kick point, thus producing a lower ball flight. So, someone that fits for the S-400 but wants to hit the ball lower would use the X-100.
Only goes up to a S-400. The S400 is heavier than the X100. Same kick points but different weights. Same Ballflight.
http://www.truetemper.com/golf/dynamicgold.asp
I am looking for answers in terms of timing and impact conditions (as opposed to just clubhead speed).
S300 will kick more and X100 will kick less, essentially S300 are ever so slightly softer and would be easier to hit a draw and the X100s will be slightly stiffer and you will hit less of a draw or even a straight/cut type shot.
Pick your poison. The S400 is a heavier version than the S300 and is popular in wedge shafts on the tour. I play X100s and S400s in my wedges. Zarro (on this website) went from hitting a pretty big draw to a slight cut when chaning from S300s (tipped) to X100s. The S300s kicked too soon and closed the face too fast for him; even tipped.
Anything else?
Or does it differ from player to player or different shots?
If a shaft is too stiff for someone they will pull it. Too weak and they will slice it or push it.
If a shaft is too stiff for someone they will pull it. Too weak and they will slice it or push it.
Tom i know you've said this before and i will agree that you are right but it isn't a "fitting rule." Different golf swings will produce different results when it comes to ball flight in regards to how stiff or soft a shaft is.
I agree with that - there is so much feedback involved in the swing from the shaft feel that all kinds of different things happen when the shaft isn't a good fit. A good clubmaker will try different shaft flexes (and maybe even different shaft profiles). One good rule of thumb is that it's better to fit a shaft that is too flexible than one that is too stiff.
Yes, if you aim right enough.I have to disagree there. A shaft that is too stiff always produces pulls whereas a shaft that is too weak will cause slices, hooks, pushes, etc. At least with a shaft that is too stiff you know what you are going to get.
Don't be confused...a pull can still be to the right of where you are trying to hit it.