If your running the Maf you need to. Thats how the Ecu runs properly, and was designed. Im sure there are countless threads about it.

-Brian

 

evo9 bov is the best

 

^^^^^what this guy said, I went through A couple of bov's that vta and I got to say recirculating my evo 9 stocker is the best thing I did, better throttle response and no F'N surges.

 

I bet the people behind love a rich running Evo.

 

I whole-heartedly disagree with your disagreement lol. The reason you hear the discharge more is because there is less muffling. One major reason for stock intake designs is to keep this noise as quiet as possible. If you've seen your fair share of newer factory airbox designs, there is a lot more to them than just air passing through a filter.

If your theory was correct, air would STALL in the MAF every single time you recirc'd the BOV. There isn't zero resistance going through the filter, it has a great deal of vacuum being applied across it. Combine that plus the constant vacuum being applied at the turbo inlet and you have enough to direct the recirc flow away from the MAF.

-Jamie

 

Yeah the best part of recirulating the bov is for the performance if you do happen to vent it, its only for the cool factor. My bov is recirculated right now and it makes me look bone stock.

 

I vent the stock DV to atmosphere, only because I am running speed density.

 

I also heard that evo8s can't really recirculate because of running lean issues. Evo9 is fine. Is thr true ? I have Hks bov which is recirculated as well but im trying to get tial bov.

 

Is it a myth that recirculating also helps with transient response between shifts since that air that would be blown out to atmosphere would in turn be sent back to the turbo?? I can see spool be better in between shifts, in for answers whether it is a myth or actually adds performance... when compared to vta that just adds more excessive noise (love the noise on a proper set up)

 

^^^^^^^^^^^^^^^^^^^

I could be imagining the same thing but when i ran a recirculating compared to a vta, it seemed like my spools going in the next gear were much quicker.

 

I'm venting 1/4 of my air to the atmosphere with a fast go bits bov. When shifting under partial throttle at 14.1 AFR's it drops to 11-12. So there you go. Runs rich in between shifts and thats all I have noticed.

 

I also find the noise of the HKS SSQV to be...a tad childish.

 

Recirc does help with response. Als/sas users noticed it works better with a recirc. Also no after air filter openings for dusty conditions to creep into.