Quote Originally Posted by GTPpower View Post
LS6 springs with TI retainers: Notice the spike in boost.

https://www.youtube.com/watch?v=j5yU-GfP-9I


Swapped to 130# comp springs. See the difference?

https://www.youtube.com/watch?v=HMT6cQoK_Cs


My trap speed also increased 3mph with these, on the same 125 wet shot.
You're running 3-4 psi more in the first video and I can tell you're running a different supercharger pulley. Did you test your valve spring theory without changing any variables?