Recirculate BOV for better MPG. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

***S14DB*** · 06-20-2008, 10:10 AM

Friend and I were having a discussion that made sense. When you have a MAF and you vent to ATM the ecu thinks the air went through the engine and you run rich for a few sec. This is wasted gas and decreases MPG. When you recirc the air stays in the system and extra fuel is not added for air that is no longer there.

Has anyone noticed a major MPG diff when switching from Recirc to ATM or vice versa?

06-20-2008, 10:10 AM	#1
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Recirculate BOV for better MPG. Friend and I were having a discussion that made sense. When you have a MAF and you vent to ATM the ecu thinks the air went through the engine and you run rich for a few sec. This is wasted gas and decreases MPG. When you recirc the air stays in the system and extra fuel is not added for air that is no longer there. Has anyone noticed a major MPG diff when switching from Recirc to ATM or vice versa? __________________ Comments should be taken as Opinions not as Statements of Fact