Request Valve Spring pressure variables

I will answer in just general terms:
- valve float usually happens with the intake valve first because it is [a] heavier not opening against the compressed gas in the chamber which aids the spring in valve train control.
- most experts agree that you should have minimal gap between springs at max lift because the smaller the gap, the less movement there can be to help contain flutter.
- the aggressiveness of the lobe itself is an important factor in determining the springs to use. A stronger spring would be needed with an aggressive lobe.