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"The BIG BOV thread" (Where all bov question threads get merged)

2M views 12K replies 2K participants last post by  WRX-maniac 
#1 · (Edited by Moderator)
This is the big BOV thread. If you didn't find this thread, you didn't search.

This thread is where all BOV question threads get merged into.

The quote below in this first post is from our BOV info sticky and contains links to some very explanatory BOV information. Please take the time to explore the links before you ask repeated questions.

Thanks!


A stock WRX/STi comes with a BPV (Bypass valve) which is a vacuum-actuated valve designed to release pressure in the intake system when the throttle is lifted or closed. This air pressure is re-circulated back into the non-pressurized end of the intake before the turbo.

An after market blowoff valve (VTA) does basically the same thing BUT unlike the stock unit it releases air to the atmosphere (giving you the loud sound). Some people see an after market BOV on a stock WRX as being in poor taste (probably due to the fact that it is basically a noise maker that really as no other benefit), while others simply find the sound very attractive.

Proponent opinions notwithstanding, there is a small mechanical downside to having an after market BOV (VTA) on a stock WRX. The problem comes when releasing air to the atmosphere that has already been metered by the mass airflow sensor. When the BOV releases (blows off), the ECU will be injecting the wrong amount of fuel into the cylinders. The engine temporarily runs too rich (meaning too much fuel is injected into the cylinders). This temporary rich condition isn’t typically THAT harmful, but it may cause bucking or hesitation on lift-throttle as well as some other concerns outlined in the links below.


Links for BOV info:

Sinister's BOV FAQ

Wikipedia

Unabomber on Nasioc

Davenow on Nasioc





 
#7,327 ·
sekretskwirl02 said:
......If you drive naked the REALLY BAD DOGS(leg humpers) seem to come out of the woodwork-therefore a little knowledge on controlling them comes i handy. Especially in Norway where it is legal for women to drive NAKED. In fact you'll find most everywhere in Scandinavia women are encouraged to drive au' naturel. Of cours it is forbidden for men to do so.:p :p
So, if you are that bothered by leghumpers whilst driving naked, common sense would dictate:
1. don't drive naked
Honey attracts flies (amonst other insects). I can't stand flies and other insects that honey would attract, yet I don't dip myself in honey and walk around outside. :screwy:

Either that, or you are just one of those girls that craves attention. If you are, then you are on the right track. Driving nekkid will certainly attract attention. :tongue:
Or if you did refer to the Dog Whisperer in the sense of controlling leghumpers, a possible dominatrix, or power trip thing going on there?
 
#7,329 ·
Jordache! said:
This threads getting out of hand. It goes from a simple question of stupidity over a bov to guys driving naked, shaved, eurpoean women, vasoline. I think ill let myself out of this thread before my mind becomes corrupted like all of yours!!!! Ahhhhhhhhh

AND DONT COME BACK :rotfl:
 
#7,332 ·
sekretskwirl02 said:
...leave already....just some harmless fun in a thread that started out as a JOKE
+1

uh, huh huh. Thettle down Beavis.
 
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