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whats the need for 2 BOV's on stock setup???

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Old Aug 22, 2004 | 12:29 PM
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Talking whats the need for 2 BOV's on stock setup???



wut an idiot
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Old Aug 22, 2004 | 12:43 PM
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none really. Mostly for show.
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Old Aug 22, 2004 | 02:05 PM
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I thought the CRV works differently from the BOV. correct me if I'm wrong.
wouldn't that hurt the performance of the car???
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Old Aug 22, 2004 | 02:18 PM
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Originally Posted by fd3s_rx7
I thought the CRV works differently from the BOV. correct me if I'm wrong.
wouldn't that hurt the performance of the car???
The BOV and CRV do have slightly different operating parameters, but for the most part they are both BOV's. That setup probably has a more noticeable transition but that's about it.
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Old Aug 22, 2004 | 02:32 PM
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Originally Posted by fd3s_rx7
I thought the CRV works differently from the BOV. correct me if I'm wrong.
wouldn't that hurt the performance of the car???
I run two ARC blow off valves (stock twins). One is used for it's intended purpose & the other is used as the CRV. I messed around with a vacuum gauge to see what pressure unseated both stock valves. Doesn't take much. I then adjusted my ARC BOV to unseat at a similar pressure (vacuum).

My car went fast before & is fast now, but it makes cool noises when I shift. Plus it adds a lot of ooh & ahh factor when you pop the hood
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Old Aug 22, 2004 | 02:33 PM
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it's just there to hear the noise when you shift


dave
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Old Aug 24, 2004 | 11:55 PM
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Talking

Originally Posted by RX7turboracerX
it's just there to hear the noise when you shift


dave

Don't forget the "ooh & ahh" factor
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Old Aug 25, 2004 | 07:24 PM
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So many not knowing newbies giving false info!

The rear one is the charge relife valve which is only opened during #2 turbo prespool. It is located on the rear half of the "Y" pipe assemble. The reason it is only open during prespool is to allow #2 turbo boost to escape to atmosphere.
Why, because boost is prevented from going to the IC by the charge control actuator which is also located in the rear half of the "Y" pipe just befor it couples with the front half. After prespool, the CRV closes and the CCA opens.

I'll let let learn on your own about the TCA.

It would be nice if you-all understood how your systems worked!
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Old Oct 4, 2004 | 08:56 PM
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Talking

Originally Posted by cewrx7r1
So many not knowing newbies giving false info!

The rear one is the charge relife valve which is only opened during #2 turbo prespool. It is located on the rear half of the "Y" pipe assemble. The reason it is only open during prespool is to allow #2 turbo boost to escape to atmosphere.
Why, because boost is prevented from going to the IC by the charge control actuator which is also located in the rear half of the "Y" pipe just befor it couples with the front half. After prespool, the CRV closes and the CCA opens.

I'll let let learn on your own about the TCA.

It would be nice if you-all understood how your systems worked!


Wow......look at the big brain on brad.

Bottom line? You can use a BOV as a CRV....... OK, so don't start gett'in all uppity on us.

Besides.....it looks cool.........ooh.........ahhhh

You can stick your head up a bulls *** to get a good look at a T-bone steak, but Id rather take the butchers word for it.

Last edited by Sled Driver; Oct 4, 2004 at 08:59 PM.
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Old Oct 4, 2004 | 09:02 PM
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did someone say dual bov's?



honestly if i didnt get them free i would only have one.
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Old Oct 5, 2004 | 01:57 AM
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Originally Posted by XSTransAm
did someone say dual bov's?


honestly if i didnt get them free i would only have one.
you should've sold one of them
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Old Oct 5, 2004 | 05:56 AM
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when does the CRV actually open then, just at the transition point? do you get a blow off noise as it travels through the rpms then? if that is the case
Originally Posted by Sled Driver
You can stick your head up a bulls *** to get a good look at a T-bone steak, but Id rather take the butchers word for it.
you can get a good look at a butchers *** by sticking youre head up... no, wait... its gotta be YOUR bull.
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Old Oct 5, 2004 | 07:21 AM
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It keeps the turbo from stalling while the flapper door is closed. Thus not gay, and very important to turbo life. Come on Pugg, I figured it all out just by looking at the vac hose diagram...
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Old Oct 5, 2004 | 09:10 AM
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Originally Posted by pugg57
when does the CRV actually open then, just at the transition point? do you get a blow off noise as it travels through the rpms then? if that is the case
It's the other way around. The CRV is venting until around 4000 rpms, then it closes to build secondary boost. The CRV is there to allow the secondary turbo to not overwork itself while not online (and spooling against a brick wall).

While the valve itself operates like a BOV, the operation it's used is different.
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Old Oct 5, 2004 | 11:49 AM
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Originally Posted by cewrx7r1
So many not knowing newbies giving false info!

The rear one is the charge relife valve which is only opened during #2 turbo prespool. It is located on the rear half of the "Y" pipe assemble. The reason it is only open during prespool is to allow #2 turbo boost to escape to atmosphere.
Why, because boost is prevented from going to the IC by the charge control actuator which is also located in the rear half of the "Y" pipe just befor it couples with the front half. After prespool, the CRV closes and the CCA opens.

I'll let let learn on your own about the TCA.

It would be nice if you-all understood how your systems worked!
Well put. In easy to understand terms(as mazda puts it) the 2nd BOV allows the pre spool to escape as not to damage the turbo.
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Old Oct 5, 2004 | 01:04 PM
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Originally Posted by Mahjik
It's the other way around. The CRV is venting until around 4000 rpms, then it closes to build secondary boost. The CRV is there to allow the secondary turbo to not overwork itself while not online (and spooling against a brick wall).

While the valve itself operates like a BOV, the operation it's used is different.
so if it were replaced with a high pictch BOV you might here it squeeling the entire way to around 4k?
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Old Oct 5, 2004 | 01:48 PM
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Originally Posted by pugg57
so if it were replaced with a high pictch BOV you might here it squeeling the entire way to around 4k?
Pretty much. Just disconnect the vent line so it vents to open air (as a test) and you'll get the idea. It's damn annoying.
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Old Oct 5, 2004 | 03:12 PM
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AGUH!

"its ricer-ific!"
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