Can you guys elaborate on the intake manifold work you guys are doing? I know Demon removed his butterfly valves to somehow gain topend performance. The intake manifold setup I have on my Maxima utilizes the same kind of intake runner tuning with butterfly valves. I actually have a manual override switch to make the valves open at any rpm I want. I've noticed that switching the valves on any earlier that 5000rpms results in a pretty severe loss of lowend power. Take a look at my dyno when I flipped the switch at 4500rpms vs 5100rpms.
Why does the lack of the butterfly valves help the CSVT? Is there a loss of power below 4000rpms, but a gain above because the valves and rod are removed to reduce high rpm power?
Dave
black 96 Maxima SE
Best ET/MPH: 14.31@99.3mph with a 2.18 60'
JDM intake manifold, ECU, intake, y-pipe, muffler
