RB26DETT run one recirculation into the intake pipe?

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ghost_22_47
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Car: 1993 Nissan 240sx Covertible with RB26dett

2004 Audi A4 1.8T Quattro

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I am currently running a atmospheric BOV which I have found with my swap was a huge mistake. I am recirculating the bov back to the rear turbo, as far as I saw from stock pics was that this was how it was set up origanally, the stock 2 BOV's were merged with a Y pipe after the bov and then routed to the rear turbo intake pipe. BUT before I send it to only one turbo was there a second tube some where that split the tube in two and also routed the bov recirculation back to the front one as well?

What I am doing is HKS SSQV with HKS recirculation fitting to a 1" hose to a custom 90 degree aluminum pipe with a 1" OD pipe welded in for the hose. But should I Y split the hose and run a hose to the front turbo as well?


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SullivanRacing06
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Car: r32 gtst, 06 350z, r32 gtr, rs4 steaga, 04 350z, f350/6bt
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recirc one bov in to either of the inlets after the maf but before the turbo

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ghost_22_47
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Car: 1993 Nissan 240sx Covertible with RB26dett

2004 Audi A4 1.8T Quattro

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Ok good thanks

Count Zero
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Car: 1990 Nissan Skyline GT-R, Federal Legal & fully registered

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Though actually the stock set up on a GT-R is 2 bov's into a single pipe, across behind/below the FMIC, then splitting again into both inlet tubes (post-MAF).

But yea, as long as the air stays in the air circuit, it doesn't matter if the recirc'd air goes through one turbo or both...they both merge together as soon as they leave the turbos anyway.

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ghost_22_47
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Car: 1993 Nissan 240sx Covertible with RB26dett

2004 Audi A4 1.8T Quattro

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I didn't know if it would help it spool faster, running them to both inlet pipes OR if it would read weird one MAF compared to the other.

MattS13.5
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Infinity FX
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recirculating your bov makes .01% difference in the gear changes as a matter of fact I've found that at higher boost pressures it creates some headaches when using high flow filters. not to mention the extra plumbing in an S chassis..no thanks

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tyndago
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If you are running MAF, it does cause an issue. The air that you are dumping is already metered, so the car goes rich, and you will often times get stalls due to a rich condition.

I really don't like BOV. On the R34 race car, Nismo did not run BOV, as they cause more issues than they help on a race car, under race conditions. Just another 4-6 points of failure.

The turbo outlets sum right after the outlet and feed common intercooler and common collector.

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SullivanRacing06
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LISTEN TO PEOPLE WHO HAVE EXPERIENCE FIRST HAND! NOT ON OPINION OR WHAT LOOKS THE BEST!

unless you move the maf or in this case mafs after the bov, in your case having two mafs you cant move them, so recirc the bov inbetween the mafs n turbo inlet/s just do it. if im saying it i know from experience, if you allow unmetered air out before it enters the motor you mite as well cut a inch long slit in a silicone coupler and go drive, your still allowing unmetered air to escape before gong thru the motor


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