1g bov vent to atmosphere? [Merged 6-8] venting

[TSIAWDTalon]

I have read a lot of "controversy" regarding bov venting to the atmosphere. I want to vent mine, for my own reasons, but I don't want to change from the 1g. Is this possible? Any help would be appreciated, and no flaming, please.

 

[LandoAWD]

Ever car is different, but we all share a Karmann MAF that counts air that passes through it. When you vent, you are losing some of that air, and the car will run rich (whether you notice it or not) and possibly stall.


SEARCH PLEASE

 

[IMMORTALSPYDER]

Just wondering if DSMlink gives you the tuning to be able to vent to atmosphere with a BOV.

 

[kpt4321]

No, that's RICERLink.

Or a MAF Translator.

 

[Defiant]

It's not a matter of tuning, it's the way the stock intake is set up. As I hope you already know, the air is measured on the way into the turbo, and the ECU arranges fuel for _all_ that air; venting throws some of it away, but the fuel is still going to get injected. You also have the problem of the BOV, being vacuum operated, sucking raw, unfiltered, unmetered air directly into the intake pipe whenever you're at part-throttle. Meanwhile, the ECU is going nuts trying to compensate for this illogical lean condition. It's not good.

 

[Violater101]

About the only thing even remotely different about venting is it makes your BOV sound better. Not really a good reason is you ask me if you are concerned with performance. Like what was said before, you can use the GM MAF's with version 2 as well as a host of other new features.

 

[13secGST]

again...no you can't vent by just getting DSMLink...you need to have either a VPC or GM MAFT...The GM is cheaper and easier...and I don't even think VPC's are sold any more. But basically the reason you can vent with the GM MAFT is because it is similar to your stock MAS and it replaces it...but where it replaces it is AFTER the BOV...so whether you are venting or not the air doesn't get measured and won't cause that rich followed by lean condition.

Now...I am currently venting with DSMLink and was before I got DSMLink...the car doesn't seem to mind it much most of the time. However the driver, me, minds it. I just haven't fixed it because I need another stock dump tube...I need to put two of them together, because with my IC piping, I haven't been able to get any kind of piping to fit.

 

[IMMORTALSPYDER]

Ok. I just read this part and thought I could:

MAF clamp Defines a switch off point for the MAF, above which the ECU will extrapolate airflow data rather than read it from the MAF.

Can anyone give me a link on the MAFT swap. I'm searching and not turning up much.

 

[Groomz]

www.dejontool.com

Another BOV vent thread. I am so interested.

<subscribes to thread>

 

[Mr96GSX408]

get a automatic

 

[13secGST]

well yeh...actually you can mess with the Hz reading from the MAS, But I personally don't know how to mess with it and haven't even touched that feature in DSMLink. I'm not sure about any of the specifics...I just know that you can mess with it..I don't know if you can turn it off and back on at certain times...that is unlikely...you could do that.

 

[1G/TS-ituner]

Hey guys..everyone is telling me to stick with the stock BOV on my talon, but i LOVE the noise they make when they dump to the atmosphere.....is there anyway to get mine to do that??? and being serious, ive tried looking in the FAQ posts, and i cant find crap worth looking at in there, theres nothing in there for general applications, or maybe i just cant find them??? i have no clue, if theres any way to do this, then can someone post the link its on if someone has made a "how to" about this??? thanks guys

 

[mugne85r]

I'd like to know also

 

[Devicex]

Pull off the hose between the BOV and intake and plug the intake pipe. Expect some issues with idle, stalling, and richness between shifts and also expect most people, including I, to tell you it's a bad idea.

Otherwise, go with a gm maft in a blowthrough configuration and you can vent your 1g BOV fine, thats how I"m doing it.

 

[91awd]

I vent and I have no problems at all. The first time I tried it my car wouldn't idle. But my friend Brian a Very smart DSM guy told me that the blow off valve leaks boost at idle so you have to crush it. I had him crush it and now it runs fine. If you want to know how to crush it go to VFAQ

 

[slodsm]

The only way to vent without the ill affects is with a GM blowthrough like Devicex stated, even then though, you will need an aftermarket BOV like a SSQV or a Type S for the lower end ones since the 1g is open at idle, it will kill spool up time. In other words, DON'T until you have about another 800 plus to throw at the car, and thats a lot of money to throw out just to vent a BOV. Get a hard intake pipe if you want to hear it so bad, then it will be louder.

 

[Devicex]

Originally posted by slodsm
since the 1g is open at idle, it will kill spool up time. words

How do idle and spool up effect one another? It doesn't leak at any time other then idle, and you dont spool at idle so....?

 

[slodsm]

Do you unerstand what causes it to open and close? The vacuum pulled at idle is what holds it open. It is pushed closed when the car transitions into boost, now do you see why it would slow spool up? Its loosing air that is not being recirced now so it will still slow spool since it is harder to build boost with what is basically a constant boost leak. When I had a Turbo XS bov on my 98, it spooled a good amount slower becuase the BOV was crap and leaked off boost oven though it was not designed too. Made the transition harder and spool up a good 500 rpm's slower than with the bov I had on before. Make more sense now?

 

[Defiant]

Originally posted by 91awd
But my friend Brian a Very smart DSM guy told me that the blow off valve leaks boost at idle so you have to crush it.

Well, he's not. You have no boost at idle, only vacuum. Which opens the BOV, and makes a hellacious intake leak at idle and between shifts. And draws in unfiltered air straight to the throttle plate, plenum, and intake valves.

Don't vent on a system that meters the air before the BOV.

 

[mavisky]

i currently vent an hks ssqv, but i'm waiting to do a gm maf conversion and don't want to have to custom make another intake pipe, plus buy the re-circ kit, only to get rid of it awhile down the road.

 

[LandoAWD]

Originally posted by Defiant
Well, he's not. You have no boost at idle, only vacuum. Which opens the BOV, and makes a hellacious intake leak at idle and between shifts. And draws in unfiltered air straight to the throttle plate, plenum, and intake valves.

Don't vent on a system that meters the air before the BOV.

 

[Ludachris]

I just posted an FAQ that touches on this:
http://www.dsmtuners.com/forums/showthread.php?s=&threadid=89000

Read number 2.

 

[Coheed]

I see these terms over and over... what exactly do they mean and how does it affect your car???

 

[jdmawd]

46 god damn matches in under 2 seconds

 

[RipperXX]

^ :laugh: Lazy


Hah, I did a small little type up explaneing it, but then I came back and deleted it. He can learn how to use the search like every one else.

 

[Coheed]

RABBLE! Sorry guys. I did a quick search and nothing in the topic headers seemed to jump out as something that was a direct answer to my question... Thanks anyway.