BOV... recirculating or vent to atmosphere?

[Bluevitz-rs]

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]

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]

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]

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]

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

My Yaris BOV vents to atmosphere.

[cdydjded]

Mine also vents to the atmosphere....

[Bluevitz-rs]

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

[cdydjded]

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

[cali yaris]

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

[Bluevitz-rs]

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

[pimp my yaris]

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]

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.