Quote:
Originally Posted by moparrob
does anyone know if you can temporarily disabled it by simply disconnecting and plugging the vacuum port and hose
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The only way to guarantee it's not flowing is to seal off the connection. Nothing permanent or difficult, just put a cap on instead of the hose or something in the hose to seal it off. Not the little vacuum hose, the one at the head that actually feeds air to the port, this will eliminate all possibilities of air flowing into the exhaust. While I doubt that the air injection does anything to performance, I see the potential for it to rob some of the scavenging effect during valve overlap and change tuning effects; haven't tested the theory. If there was a plate installed where the gasket goes it would maximize the blocking of pulses a little more than a cap/plug on the hose fitting, but probably an unmeasurable difference. Ideally the air hole would be filled at the exhaust port so that it's not existent, but that's much more involved.