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Originally Posted by prelude180
yes, but I was wondering if there are any major benefits to converting over to a MAP sensor and using an atmospheric bov, compared to the regular recirculate/ MAS sensor setup?
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MAF sensors as you know run off air, so logically if there ins't a continuous volume of air, you have a problem. Using a BOV with a MAF frequently harms your car's performace on the whole. A MAP sensor runs off pressure, so regardless of the volume of air as long as there is till pressure, you're car runs fine. This is grossly simplified but i'm not qualified to teach a physics class. think of it this way, you vent air on a MAF system and the car goes "where the fuck is the air, shit, give it fuel to keep it going." So you backfire and it sounds cool and the BOV goes "FOOOOSH" and you're happy, but slowly your hurting your motor and in turn your walet. Now think of a MAP system (this is where my turbo/na honda experience is great), if you vent to the atmosphere, it means nothing to the engine computer, it has no idea what air volume is, it just knows pressure. Your car runs fine, and IMHO is easier to tune because you can go off fine pressure adjustments and compensate very easily for density, but thats just the bulk of my personal experience speaking.
The main answer to your questions is IF you switch to a MAP system, and i CAN be done its just tricky or expensive, you can vent to the atmopshere. If you keep a MAF system, it's better to use a reciculating system. If the sound matters that much to someone, let them vent, if performance is their true concern then they should recirculate. AND almost all BOV's can be adapted or are designed to be used for recirculating, it just means you add a pipe.