Thread: Recirculation

still a noob to a certain extent, ok my set-up recirculates, i'm currently running 9-10psi....what do i need to do in order to not have a recirculating set-up?....i plan on getting a z32maf, injectors set to 4 bar, and a fpr

can i ask exactly why you want to do away with the recirc?

i dont necessaryily want to do away with it, i was just wondering for now, i do have another BOV (HKS SSQV) looks nothin like my stock one, and i have no idea how i would make that recirculate back to the intake...also heard if you're running more than a certain amount of boost, it doesnt need to recirculate, but just to blow out into the atmosphere, etc...

you can run open atmosphere but its gonna run a little rich everytime it blows off
i ran mine for 2 years open and never saw any problems


but if you wanna run it open and do it right, a blow through maf setup is what you need
you just need to relocate the mafs so it is inbetween the TB and the BOV
that way it won't read any of the air that is not going into the motor

Your information source was incorrect; here's the quick explanation.

If your car is a MAF based system (stock) it takes in account the amount of air that passes thru the MAF, and it sends this info to the ECU to determine the amount of fuel it needs.

If you blow off the pressurized air, the ECU has no clue of this and it continues to use the same amount of fuel making you run rich.

Hope this helps

From a reliability stand point, if you're going to be upgrading injectors and MAF and whatnot, your best bet is to change from draw thru (stock) to blow thru. If you happen to blow a coupler on the intercooler piping, you can still drive the car. This of course, depends on where you blow the coupler. Normally, though, I see/experience couplers blowing around the intercooler, on the hot side piping. If you're draw thru, the MAF sits before the turbine, so if you pop a coupler off, the motor will die.

ok, i think i understand what you're saying, just not visualizing it....so the piping with the MAF (no pressurized air side) re-route it inbewtween the TB and BOV? so basically it will look like a "T" pipe or something? with that being said what will the MAF read? wouldn't it pick up the pressurized air coming to the TB?
or is there a picture of this so i can be visually clear?



yeah i kinda get what you were saying, i was running rich intially because i had the jdm O2 sensor still in, i kept stalling because of the TPS, i had did the recirculation, but had problems because of the previously stated, but yeah i get what you're saying



i blew the coupler that connect to the TB and i couldnt go past 20mph, so i get where you a coming from...

ok so stock set-up that reciculates is "draw thru" and no recirculation is "blow thru" right? and to run "blow thru" re-rout MAF between TB and BOV?
and since i plan to upgrade MAF and injectors, better to go with "blow thru"?

on the inlet of the compressor you will only have a air filter and yes the MAF will now be placed after the turbo between the TB, and BOV so when the valve relives extra boost that air hasn't yet been metered by the MAF

ok, my set-up is a little different, my BOV is next to the TB, will it make a difference and will this work? look at the pic (edited matt's pic)


will the diagram that I have work, that is currently my stock set-up, will this blow thru set-up work?