BOV... recirculating or vent to atmosphere? - Toyota Yaris Forums

Bluevitz-rs · 07-24-2010, 10:43 AM

I've read that while using a MAF for airflow metering, you should be using a recirculating BOV. If that's the case, do you want the MAF to be on the intake or discharge of the turbo?

I can see a venting BOV to be a problem if the MAF is before the turbo as you'd be expelling metered air and would run crazy rich when you let off the throttle.

Those with turbos, what's your setup?

cali yaris · 07-24-2010, 01:35 PM

I have the Turbonetics kit in my tC, it has a recirculationg BOV. I think many bolt-on kits work that way for the reasons you mention.

on the Yaris, my BOV is installed right on the intercooler.

jenfre · 11-06-2010, 01:39 AM

Quote:

Originally Posted by cali yaris

I have the Turbonetics kit in my tC, it has a recirculationg BOV. I think many bolt-on kits work that way for the reasons you mention.

on the Yaris, my BOV is installed right on the intercooler.

but on your yaris is the bov exhaust air in the piping ? or atmospheric ?

yarisugi · 11-06-2010, 03:09 AM

If you install a recirculating BOV, the discharge end of the BOV should lead back to the intake - anywhere between the MAF and inlet of the turbo. T

cali yaris · 11-06-2010, 11:55 AM

Quote:

but on your yaris is the bov exhaust air in the piping ? or atmospheric ?

My Yaris BOV vents to atmosphere.

cdydjded · 11-06-2010, 12:20 PM

Mine also vents to the atmosphere....

Bluevitz-rs · 11-06-2010, 05:24 PM

But Cali's Yaris is running a MAP sensor. Right?

cdydjded · 11-06-2010, 10:30 PM

Should be since he is not using the factory ECU & is using an AEM EMS...

cali yaris · 11-07-2010, 12:33 AM

^ correct. but it was also vented to atmosphere when I first ran the turbo at 8 psi on the ECU.

Bluevitz-rs · 11-07-2010, 09:09 AM

And you didn't have any stalling issues from the system going rich when you let off the throttle?

pimp my yaris · 11-07-2010, 09:26 AM

I vent to atmosphere. My BOV is adjusted a little tight. Once in a while I will dye out if I stab the gas in first and then shift to neutral and let idle. This will cause that very rich idle condition. But during all other normal shifting and full throttle driving its just fine. I was thinking of recirculating just to see how the car reacts.

cali yaris · 11-07-2010, 10:54 AM

Quote:

And you didn't have any stalling issues from the system going rich when you let off the throttle?

I had no problems at all.

07-24-2010, 10:43 AM	#1
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	BOV... recirculating or vent to atmosphere? I've read that while using a MAF for airflow metering, you should be using a recirculating BOV. If that's the case, do you want the MAF to be on the intake or discharge of the turbo? I can see a venting BOV to be a problem if the MAF is before the turbo as you'd be expelling metered air and would run crazy rich when you let off the throttle. Those with turbos, what's your setup?

07-24-2010, 01:35 PM	#2
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I have the Turbonetics kit in my tC, it has a recirculationg BOV. I think many bolt-on kits work that way for the reasons you mention. on the Yaris, my BOV is installed right on the intercooler. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

11-07-2010, 12:33 AM	#9
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ correct. but it was also vented to atmosphere when I first ran the turbo at 8 psi on the ECU. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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11-06-2010, 03:09 AM	#4
yarisugi やりすぎだ～ View User's Garage Drives: Me: Nuts: Join Date: Nov 2008 Location: ハワイ Posts: 2,041	If you install a recirculating BOV, the discharge end of the BOV should lead back to the intake - anywhere between the MAF and inlet of the turbo. T

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cdydjded Drives: Yaris LB Turbo Join Date: Aug 2006 Location: Miami FL Posts: 782	Mine also vents to the atmosphere....

11-06-2010, 05:24 PM	#7
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	But Cali's Yaris is running a MAP sensor. Right?

11-06-2010, 10:30 PM	#8
cdydjded Drives: Yaris LB Turbo Join Date: Aug 2006 Location: Miami FL Posts: 782	Should be since he is not using the factory ECU & is using an AEM EMS...

11-07-2010, 09:09 AM	#10
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	And you didn't have any stalling issues from the system going rich when you let off the throttle?

11-07-2010, 09:26 AM	#11
pimp my yaris C'est la vie Drives: 2009 2 door hatchback Join Date: Aug 2009 Location: chicago Posts: 482	I vent to atmosphere. My BOV is adjusted a little tight. Once in a while I will dye out if I stab the gas in first and then shift to neutral and let idle. This will cause that very rich idle condition. But during all other normal shifting and full throttle driving its just fine. I was thinking of recirculating just to see how the car reacts.