I would note that according to the Dynojet page referenced, the PCV works on the SF at low RPM and throttle positions ONLY if you have a DP ECU, as is supplied with the either the carbon (not the titanium) Termi slipons, or the full system in the US. This implies that the DP ECU supplied with these systems bypasses the Lambda (oxygen) sensor inputs, even though they are still mounted in the exhaust, and connected to the ECU. Thus the PCV is able to fully modify the fuel mixture even at these low RPM's/throttle openings with this ECU in place, because it is always running OPEN LOOP.
No catalytic converter => no need for closed loop operation.
