blow off valve

[zayzay]

does a bov cause you to loose horsepower? i was told it cause the car to loose psi when changing gears.

[adevangel84]

BOV does the same thing as the stock duel diverter valves except it goes to the atmosphere. When your throttle closes all that air needs to go some where instead of back to the turbos, so the BOV or diverter valves opens to release it to save your turbos. People up grade the charge pipe and diverter valves bc its prone to leaks at higher boost. I have vented my diverter valves to the atmosphere and havent notice any power loss and now i have a ER chargepipe with Synapse BOV with no noticeable lose in power.

[zayzay]

a friend of mine dynoed his 1m stock and got 335whp which is impressive. i do have the tial bov and er chargepipe. i am going to dyno my car next week and see if i get similar horsepower numbers as my friend

[1'M Blue]

Numbers may differ from one car to another (and that does not necessarily mean ur car might be either more powerfull or less powerfull because of the BOV ) .. Just FYI.

[Jay-K]

Originally Posted by zayzay

a friend of mine dynoed his 1m stock and got 335whp which is impressive. i do have the tial bov and er chargepipe. i am going to dyno my car next week and see if i get similar horsepower numbers as my friend

very interested to see WHP gain..

[zayzay]

my tial bov constantly whistles, does anyone else have this problem? and is this normal?

[RimasRS]

I'm impressed...

[zayzay]

just wondering if it is normal for my tial bov to whistle as much as it does especially during start up and under hard acceleration?

[E30 Racer]

Originally Posted by zayzay

just wondering if it is normal for my tial bov to whistle as much as it does especially during start up and under hard acceleration?

What spring are you using?

[zayzay]

not sure, the tial bov was installed with er chargepipe and shipped to me. ever since it has being installed, it whistles alot. also wondering if this would cause any horsepower loss or pressure boost loss?

[E30 Racer]

Any error codes? Have you collected a data log? Videos?What tune?

[zayzay]

no error codes, no tune, no data log

[OrangeCrush]

I hear a whistle, air leak sound while the car is building boost. It happens with m button pushed...a little over mid throttle starting close to 3000 rpms. Is this normal because I don't remember it doing this before. My 1M is stock and while I was at the dealer they checked it out and said it was normal blow off. That explanation doesn't sound right. The car also feels like it has more lag but that may be because I am getting used to the power. I don't want to sound like a total noob but is this normal?

[zayzay]

my tial bov whistles whether the m button is pushed or not. it is really loud when the engine is cold and you start the car, it also continues while driving. i spoke to er and they told me to ship it back for them to check it out. if there is anything wrong they said the would replace the chargepipe and the bov.

[OrangeCrush]

Originally Posted by zayzay

my tial bov whistles whether the m button is pushed or not. it is really loud when the engine is cold and you start the car, it also continues while driving. i spoke to er and they told me to ship it back for them to check it out. if there is anything wrong they said the would replace the chargepipe and the bov.

That's good that they will replace it if it is faulty.

I was using stating that mode was on because of the throttle difference compared to when it is off.

[zayzay]

i wonder if the whistling from the bov causes horsepower loss?

[RimasRS]

Originally Posted by zayzay

i wonder if the whistling from the bov causes horsepower loss?

If this is boost leak then YES for sure.

[lightning]

i'm on the tial + ER and charge pipe and so far there has been no problems. works better than the stock diverter valves. In fact, my charge pipe whistles a little, but then again it might be due to my AR downpipes.

get a boost gauge to check if there are any boost leaks. I'm using a a defi boost gauge to monitor leaks and so far so good.

[05C4R]

my tial bov whistles when it opens, no lack of power but its getting annoying

[zayzay]

my tial bov whistles when i start the car, during driving and at idle. er told me to send it back to them for a diagnosis and if anything is wrong, they will send me a new chargepipe with bov