To Recirculate or not to Recirculate that is the ??

[300Plus]

I know this topic has been argued but haven't heard a conclusion. I've got and Rb25 series II. I'm going to be running 12 Psi on the stock turbo (fpr now) with 2.5 inch hot side piping and 3inch cold side. with a 90mm q45 TB on a huge custom intake mani. the BOV that came with my RB from japan ( Blitz DD)wasn't recirculated. I'm wondering if I should or should recirculate because if I choose to I will put the BOV on the hotside so it will blow right back into the Turbo. Watcha think?

[eh?]

recirc or go blow through maf. If you don't you'll run rich everytime you shift quick making the car bog down until all that extra fuel is exhausted.

[300Plus]

K if I do go that route does anyone have a Blitz DD fitting to make it recirculate able?

[PANGES]

my bov is'nt recirculated right now and i'm back firing all over the place. Strangely, i'm idling just fine though. Gonna recirculate tonight. Dunno how to recirculate the bltiz but if u want a stock rb25 bov I have one

[300Plus]

I've got a stocker. Should I run it? I was hoping to run the Blitz but if the stock BOv will do just as good of a job i might have to use it. More input?

[Bluefire]

Just recirculate the bov.... Some cars have problems with atmospheric bov's some don't, but its always better to just recirculate with a maf setup.

The stock bov should be fine and can hold plenty of boost, but if you really want to run the blitz, a recirc fitting is easy to make for it. Just get a flat piece of aluminum or steel to make the flange and weld a piece of piping to it so you can run a hose back to the intake. Very easy piece to make.

-Bluefire

[scottsi]

i have a blitz fitting, its the one that has a filer thing on it, you can cut it off and put a hose around it, and weld a nipple onto the pipe and run the hoses together

[300Plus]

do u have an extra? if not I might have to make one

[cvc9216]

I have an extra one of those blitz bov filters. email me [email protected]

[bmadd2402]

doesn't the HKS EIDS solve the problem of running rich every time you shift or lift?

[300Plus]

planning on going blow through MAF check out the next thread, give me input

[ehacker01]

I did a blowthrough on my KA-t with out any stalling backfiring from the open BOV. Sounded great too.

[Carl H]

doesn't the HKS EIDS solve the problem of running rich every time you shift or lift?

thats a super ghetto fix for that, in reality a maf based car needs to have a recirc'ed bov.that is unless you are running a blowthru setup.

[PANGES]

doesn't the HKS EIDS solve the problem of running rich every time you shift or lift?

does'nt that only solve the idling problems which most rb's dont seem to have? From what I understand, it will still bog and run rich at shifts.

[PANGES]

can someone explain this blowthru thing more?

[gawdzilla]

can someone explain this blowthru thing more?

blowthru maf involves putting the maf after the turbo and before the throttle body. it allows you to run an atmospheric bov because you can place the bov before the maf. when the bov opens you will be venting air that has not yet been metered by the maf. your ecu wont expect to see that vented air, so there will be no excess richness.

[Kansei240sx]

So... What would be the benefit of a blow thru maf, rather than having it run before the turbocharger, the only bad thing i could think of on a blow thru maf, is that it cant read pressurized air, and that the tempuratures are also going to be higher after the turbo obviously, and that the maf ussually has colder air going through it, so either which way, what does it lack/compensate for obviously other than the rough idle problem on the BOV.

[Shocker]

Not exactly with the MAF being after the turbo, if you mounted it on the hot pipe yes, it will be much much hottet, but mounting it on the cold pipe side will be just fine, being that most decently good IC's cool the air back down to almost air temp, therefore it will be almost the same temp of air only this time pressurized. You might have a few problems with the maf wanting to leak under high boost, but there are ways around this...