Originally posted by Terry Haines:
No point in opening them sooner, if you do it = loss of intake velocity+ loss of good fuel mixing = loss of power.The velocity of the incoming air is missed,its reason is to improve fuel mix & cylinder fill at lower engine speeds........
I have dyno proof to support that. According to my graphs the IMRC should open around 3300-3400rpm for optimum effect of both curves. (atleast on my car; with my mods last fall)
