Installation of a recirculating BOV???
#1
Installation of a recirculating BOV???
Is it possible to install a recirculating BOV on a V1 system? I've been told, and have read that in some cases they could be better.
1 example of where I was thinkin it would help is with the A/F ratio (If for nothing else). I remember reading not too long ago about someones A/F ratio goin berserk briefly during shifting due to the BOV releasin the air into the atmosphere.
Is it possible to install? Could it be beneficial?
1 example of where I was thinkin it would help is with the A/F ratio (If for nothing else). I remember reading not too long ago about someones A/F ratio goin berserk briefly during shifting due to the BOV releasin the air into the atmosphere.
Is it possible to install? Could it be beneficial?
#5
i already have an atmospheric.. but I have read in more than one place on more than one forum for multiple cars that a recirculating BOV is better/more efficient. And I've heard them on my buddies civic and another friends WRX. I think they sound better than an atmospheric.
#8
Originally Posted by vortechpower
Yes it is better in most cases to recirculate the air. Keeps a flowing cycle of air...
#9
Originally Posted by MaximaEvolution
Is it possible to install a recirculating BOV on a V1 system? I've been told, and have read that in some cases they could be better.
1 example of where I was thinkin it would help is with the A/F ratio (If for nothing else). I remember reading not too long ago about someones A/F ratio goin berserk briefly during shifting due to the BOV releasin the air into the atmosphere.
Is it possible to install? Could it be beneficial?
1 example of where I was thinkin it would help is with the A/F ratio (If for nothing else). I remember reading not too long ago about someones A/F ratio goin berserk briefly during shifting due to the BOV releasin the air into the atmosphere.
Is it possible to install? Could it be beneficial?
On the 4th gen stillen s/c setup the BOV is before the MAF, so releasing the air to the atmosphere won't have any adverse effects because the air hasn't been metered yet.
However, in the 5th gen stillen s/c setup, the BOV is after the MAF, so releasing the air will cause a temporary rich condition. This is because the MAF sees "X" amount of air and tells the ECU there is "X" amount of air coming in so it can add the correct amount of fuel. But if this metered air is released to the atmosphere, the extra fuel is still dumped into the engine causing a disturbance in the A/F mixture. Another example of this type of setup is in the Audi A4 1.8T. The stock bypass valve is after the MAF, so people who put on HKS/Blitz/Greddy blow off valves immediately get a CEL for an a/f problem.
The stock Stillen S/C setup came with a Bosch bypass/recirc valve that routed the air back to the uncharged side. The Bosch unit is only good up to around 10 psi or so, so if you're boosting more than that or if you just want the "wooosh" sound, you'll need a stronger/different BOV.
#10
Originally Posted by ewuzh
Expanding on what Jsutter said, it has everything to do with the placement of the MAF and BOV.
On the 4th gen stillen s/c setup the BOV is before the MAF, so releasing the air to the atmosphere won't have any adverse effects because the air hasn't been metered yet.
However, in the 5th gen stillen s/c setup, the BOV is after the MAF, so releasing the air will cause a temporary rich condition. This is because the MAF sees "X" amount of air and tells the ECU there is "X" amount of air coming in so it can add the correct amount of fuel. But if this metered air is released to the atmosphere, the extra fuel is still dumped into the engine causing a disturbance in the A/F mixture. Another example of this type of setup is in the Audi A4 1.8T. The stock bypass valve is after the MAF, so people who put on HKS/Blitz/Greddy blow off valves immediately get a CEL for an a/f problem.
The stock Stillen S/C setup came with a Bosch bypass/recirc valve that routed the air back to the uncharged side. The Bosch unit is only good up to around 10 psi or so, so if you're boosting more than that or if you just want the "wooosh" sound, you'll need a stronger/different BOV.
On the 4th gen stillen s/c setup the BOV is before the MAF, so releasing the air to the atmosphere won't have any adverse effects because the air hasn't been metered yet.
However, in the 5th gen stillen s/c setup, the BOV is after the MAF, so releasing the air will cause a temporary rich condition. This is because the MAF sees "X" amount of air and tells the ECU there is "X" amount of air coming in so it can add the correct amount of fuel. But if this metered air is released to the atmosphere, the extra fuel is still dumped into the engine causing a disturbance in the A/F mixture. Another example of this type of setup is in the Audi A4 1.8T. The stock bypass valve is after the MAF, so people who put on HKS/Blitz/Greddy blow off valves immediately get a CEL for an a/f problem.
The stock Stillen S/C setup came with a Bosch bypass/recirc valve that routed the air back to the uncharged side. The Bosch unit is only good up to around 10 psi or so, so if you're boosting more than that or if you just want the "wooosh" sound, you'll need a stronger/different BOV.
Andrei
#11
Originally Posted by Nismo98
Does Bosch bypass valve produce any sound in between shift?
Andrei
Andrei
#14
Originally Posted by JSutter
umm when you close the throttle the cycle is broken thus vaccum is created and the bov opens up and lets out the air that would surge the compressor.
#15
Recirculated BOVs have a very slight advantage of putting some pressure before the SC/turbo and helping it spool faster for turbo or flow more a little more air with SC. I would think it would help turbos more than SCs and I am not sure if it is a huge deal for either.
#16
Originally Posted by SPiG
Recirculated BOVs have a very slight advantage of putting some pressure before the SC/turbo and helping it spool faster for turbo or flow more a little more air with SC. I would think it would help turbos more than SCs and I am not sure if it is a huge deal for either.
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