Cam retarding?

[Swifty1638]

So the ways to increase spool speed so far mentioned:

-Ball and spring MBC
-Retard exhaust cam or advance intake cam by one tooth
-Open/better flowing exhaust (cutout)
-Retard the timing and richen the fuel : I've had decent results actually leaning out because it makes then exhaust gases hotter. I don't want to make a primative antilag effect, I jsut want to make a little faster spool, since Work done by the turbine = Massflow X Cp X (Temp exhaust manifold - Temp down pipe)
-True cold air intake
-Tubular exhaust manifold
-higher spring preload on the wastegate

-A. Swift