BOV Plans

[forumboarder154]

Im going to get a bov, but I'm not sure which one to get. I want a stock 1g bov, but you have to weld a flange on is that correct because I thought BOV's were just a bolt on? If you have to get a 1g welded what about a Greddy RS or any other aftermarket ones?

-Kyle

 

[MrBoxx]

http://dsm.dejonpowerhouse.com/

On the sidebar, click on "BOV -Misc Tools" in the third section. Scroll down and you'll see an adapter for the 2g intercooler pipe to a 1g BOV. It does not need to be welded on at all; two bolts hold it on. Another part you'll find is an adapter plate to go from a 1g BOV flange to a Greddy BOV flange, in case you get something different in the future.

2g UIP->1g BOV(right)/GReddy(left)

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1g BOV flange -> Greddy flange adapter

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[4BangR-x]

Just for future reference a BOV refers to an open atmosphere release. It does not recirculate. The 1g is a CBV or compressor bypass valve. This refers to the fact that it releases the charged air back into the intake so your MAS readings are still correct.

A 1g CBV is recommened by atlest 80% of this forum, so good choice. Also Dejontool is a very reputable company.

 

[forumboarder154]

4BangR are you trying to say that a 1g bov recirculates because you kind of confused me because, yes I want it to recirculate just like my 2g one. So it should just be an easy replacement job right?

 

[MrBoxx]

Yes, the 1g CBV recirculates just like the 2g one. Some people vent their CBVs without knowing what mods they need to do it properly, and they end up running rich. But it's good that you want to recirculate.

4BangR-x, I never would have taken you for a necroperfectionist. Bold/underlined/italics was just for you.

 

[4BangR-x]

Actually Mr. Boxx I was just clarifying for his sake not yours...infact I didnt even notice whether or not you had typed CBV or BOV.

 

[No_Skillz]

Man... picking at straws here, are we? Now I can tell my honda friends that I can change from BOV to CBV in less than 1 min. They'll be like I don't know what you're talking about but man you must be fast.

Btw - congrats on the wiseman boxx

 

[MrBoxx]

No problem. It's a good tidbit of information to know, and CBV isn't one of those terms you hear everyday. I'm sure a few people see "CBV" and they're like "What's that?" but they know "BOV" by heart.

 

[dave99gst]

all though its commonly called a BOV - the correct term is a CBV.
If you went to the dealer asking for a BOV they may be clueless (aint they always?)
Ive also heard it called a pop-off valve.

 

[No_Skillz]

And bypass valve (PBV?).

 

[4BangR-x]

aaaaah yes the pop off valve!!! Is commonly used to describe Saab CBV. Why? Not really sure, I think Saab owners think they are too good to have what other cars have


No skills, wouldnt that be BPV?

 

[keymaster]

Just since no one else really corrected him here...4BangR, the term has NOTHING to do with whether it recircs or not. My greddy Type-S BOV recirculates. Just because it's called a BOV doesn't mean it has to vent to atmosphere.

 

[4BangR-x]

umm actually yes it does.

 

[glenneclipsegsx]

You can run any bypass valve as a blow off valve including the 1g valve. Not recommended for cars with mas sensors that meter air before it reaches the valve like our cars. If you run a GM maf after the valve you can run a vented valve however because the air will be counted correctly. Or if you run a non mas computer system like aem ems u can run a vented valve. In high pressure applications a Tial Bov is generally in order which can not be recirculated due to its design. On cars that actually need a Tial you probably will be running a standalone or at least a gm maf.

QUOTE=4BangR-x]Just for future reference a BOV refers to an open atmosphere release. It does not recirculate. The 1g is a CBV or compressor bypass valve. This refers to the fact that it releases the charged air back into the intake so your MAS readings are still correct.

A 1g CBV is recommened by atlest 80% of this forum, so good choice. Also Dejontool is a very reputable company.[/QUOTE]

 

[No_Skillz]

No skills, wouldnt that be BPV?

Yeah that's what I said.

Keymaster - 4banger is right about the exact technical terminology... it's just the rest of the world has smudged it all up.

 

[4BangR-x]

heres a nice little site...

http://wwwrsphysse.anu.edu.au/~amh110/Technical_pages/blow_off_valve.htm

 

[glenneclipsegsx]

The terms blow off valve and bypass valve (diverter valve) are loosly used and should be taken with a grain of salt. You can use certain valves both ways. For the people who understand the nature of how these valves work you can call them what you want. I know these european guys call their bypass valves, diverter valves and think they are actually different from each other.

Just since no one else really corrected him here...4BangR, the term has NOTHING to do with whether it recircs or not. My greddy Type-S BOV recirculates. Just because it's called a BOV doesn't mean it has to vent to atmosphere.

 

[glenneclipsegsx]

again the terms used here are not standardized. There are other names used globally. But remember that terms that are synonomous to bypass means that you are using your valve recirculated and that terms synonomous to blow off mean you are venting. You can run a greddy valve either way, you can run a 1g valve either way, you can run a Tial only as a BOV, etc....

heres a nice little site...

http://wwwrsphysse.anu.edu.au/~amh110/Technical_pages/blow_off_valve.htm

 

[4BangR-x]

that was pretty much my point.