Contour Enthusiasts Group Archives Forums Modifications Duratec Maintenance remove secondary intake runners?

I don't understand why anyone with an unmodified car would consider removing the secondary butterflies... the intake was optimzed for the best possible flow during the power band ranges that a stock CSVT would have. The primary and secondary runners have calculated lengths so that impulses of air resonate back to the intake valves just as the valves are opening. The higher the rpm the shorter distance the air needs to travel, hence the secondary runners opening at high rpm's. If you remove the butterflies you now have air flowing through that secondary all the time. Which means you are redirecting air away from the longer runners, which are optimzed for all of your low end power, the most possible air is no longer resonating off of the primary runner. This would result in a decrease in power period. However if you have a modified engine that needs resized runners to optimize your power then maybe removing the secondary butterflies could be a benefit, but you would have to know what you are doing. Personally if I had a engine that was that modified I would just build a new intake all together. Either that or find an existing intake manifold out there that has about the right sized runners and retro fit it onto the engine if possible (ex: 92-95 SHO intake)