Originally posted by Munson: I can't answer your question about how beneficial that extra crossover tube would be to a Duratec. However, I suggest that you take a look at this link for some great technical information on the Probe GT's KL V6 variable intake resonance system.
http://www.highlandsun.com/hyc/sae920677/
I recommend you guys have a look at Mazda's VRIS used on the 2.5L V6 Probe, MX-6, and 626 - it is a variable intake that has 4-stages of operation. The following page by Mike Paszti's does an excellent job of explaining how VRIS works and how it can be modified: http://www.geocities.com/mikey9t6/car_uvwxyz_vris.htm In particular, note the "short resonance tube" with butterfly valve - that is the crossover tube that we are trying to add.
Black '98.0 GL V6/MTX, tints, SVT airbox (sans fender boot), stock muffler replaced with spiral racing muffler, A6 side markers, Cougar 16" polished wheels w/ bald 205/50/16 Yoko A520's, Mobil 1 5W30, Castrol SATF/Ford FM tranny cocktail, 9005 high-beam bulbs all around, re-aimed stock foglights
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