Quote:
Originally Posted by rhombus
Expanding your point.
The reality is that in naturally aspirated form, the DISA manifold operates at 14.5 psia (psi absolute); what we call atmospheric pressure @ sea level or 0 psig (psi gauge). At Atmospheric pressure, the system works, the designed resonance chambers and DISA flaps work with the engine's resonance frequencies / valve openings at set RPM points.
The intake manifold is more or less a closed system. Increasing the pressure from 14.5 psia to 20 psia (5 psig of boost) will not change the function or operation of the DISA system. The engine still has the same resonance frequencies. The intake manifold and DISA system do not reference ambient pressure to function, making it a closed system. Increasing the intake pressure makes no difference to what is going on in the Intake Manifold or the resonant frequencies of the engine. Think about it, the system also works at both high and low altitude and this is a change in pressure (albeit a small one).
The only function of the intake manifold that is changed by boost pressure is the crank case ventilation system.
Looking forward to getting the kit on my wagon...
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Oh boy, all wheel drive with this thing would be a blast! Please provide feedback if you end up installing it!
