||I thought that the flutter sound was normal in a highly boosted car. Thinking about it this way:
-Boost tubes pressurized.
-Throttle plate closes, sending signal to recirc/BOV to release all pressure above manifold pressure.
-Recirc opens quickly, sending a low pressure wave out along the boost hoses
-like in a tuned exhaust this low pressure wave will return to the recirc which "could" cause the valve to close suddenly.
-this repeats very rapidly, causing the flutter sound.
Bear in mind that this was my way of explaining the flutter sound before I had a full grasp of how everything works.
BlackholeZ VTC Solenoid Caps and Installation Procedure
"Capitalization is the difference between helping your Uncle Jack off a horse, and
helping your uncle jack off a horse."
"'she' also likes to swap since I think I am going to need to give her to woody
again." - Dvlhntr
"full alphabetic boost mode" -
"Two oil eating, angry, spinning triangles of death." - turtleboy on rotary engines
" You're the Skrillex of Z32s." BradX (UF)