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Special BOV for our cars which use MAF sensor?

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hp_zim
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Special BOV for our cars which use MAF sensor?

Postby hp_zim » Tue Feb 25, 2014 1:00 pm

I was visiting a local tuner and discussing the turbo conversion on the Altezza and he mentioned that because of the MAF sensor the normal BOV would not work and I would need a twin port type, is this true?

The explanation is that with using the normal type of BOV under idle the BOV will be open and this will cause the MAF sensor to get an incorrect reading and then cause the engine to hunt or have a rough idle

I think the Subaru's use a similar setup of BOV's

ESXTEZZ
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Re: Special BOV for our cars which use MAF sensor?

Postby ESXTEZZ » Tue Feb 25, 2014 4:50 pm

Loads of cars use them, it's just a twin piston dump valve.
You can move the maf sensor to the boost side of the system and map it like that to be trouble free.

Soiled
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Re: Special BOV for our cars which use MAF sensor?

Postby Soiled » Tue Feb 25, 2014 6:30 pm

Our cars are fine with any bovs, they should not be open under idle this is a sign of the wrong spring choice. I've had both GReddy type r and tial Q40 and no problems, neither of which are two port bovs.

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Re: Special BOV for our cars which use MAF sensor?

Postby hp_zim » Tue Feb 25, 2014 6:37 pm

I will be using the GReddy e-manage blue piggyback unit and so tunning capability might be limited

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Re: Special BOV for our cars which use MAF sensor?

Postby twiglett-RS200 » Tue Feb 25, 2014 8:23 pm

Tuning ability isn't THAT limited on the e-manage.
The bov shouldn't be open at idle anyway.
My blitz bov came loose and caused hunting so I just blocked the vac line and kept it shut.
Hasn't affected the running of the car at all.
Just makes more of a fluctuating noise due to the turbo impellor being slowed by the stalled air.


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