BOV to atmosphere

[mtboeder]

I am sure this has been asked a million times or explained, but I cant find the thread on this. I have a HKS BOV and it is venting to atmosphere, why is this bad? Everyone tells me to vent it back into the intake, but why? I think that this would make my car run alittle rich, but are there other problems that I need to know of?

 

[shallowshowcase]

when venting to the atmosphere your bov is letting out air that has already been measured by the MAS. if you vent it out then the engine is dumping in too much fuel. enough said.

 

[Catbox_95]

But doesn't it just dump too much fuel when you let off the gas and vent? What's so bad about running rich for 0.2 seconds between shifts?

 

[DSMvroom]

once you are more aquianted with your car you will really see how much the car runs like crap with it dumping out. Your shifts especially will be affected (unless you have A/T); you will notice you have to shift differently because of how spammed with fuel the combustion chamber is. You may not think it is that much fuel extra, but it is significant. Significant to the effect of driveability and performance.

 

[Catbox_95]

I ran a 13.90 @ 102 mph with a stock turbo, stock intercooler, crappy tires, crappy 60' time, un-tuned and venting. How much better do you honestly think I would run if I wasn't venting? I know I'm the annoying 10% who will argue that it's not a noticeable difference, I just have a hard time seeing the logic.

 

[shallowshowcase]

well they call it an air fuel mixture for a reason. there wouldnt be a MAS if it wasnt needed. i cant tell you how much better of a time ud get or how better your shifts would be as its different with everyone. if you want to vent get a blowthrough setup and do it right thats my .02

 

[oldman]

I ran a 13.90 @ 102 mph with a stock turbo, stock intercooler, crappy tires, crappy 60' time, un-tuned and venting. How much better do you honestly think I would run if I wasn't venting? I know I'm the annoying 10% who will argue that it's not a noticeable difference, I just have a hard time seeing the logic.

1. The thread starter still has the leaky 2G bov so he'll be losing metered air under boost as well.

2. Re-circulation even with a blow through setup will keep the turbo spooled between shifts.

3. Bad gas mileage.

4. Venting makes your car stink.

5. Poor drivability like stalling.

I've just given you five good reasons not to vent, what's your logic for venting?

 

[Catbox_95]

1. The thread starter still has the leaky 2G bov so he'll be loosing metered air under boost as well.

2. Re-circulation even with a blow through setup will keep the turbo spooled between shifts.

3. Bad gas mileage.

4. Venting makes your car stink.

5. Poor drivability like stalling.

I've just given you five good reasons not to vent, what's your logic for venting?

1. I agree.

2. I'll give you some credit here. I never thought of it that way, although I do not see it being of significant help in maintaining spool.

3. I get 28.5 mpg. That's not bad.

4. Car has never stunk.

5. Car never stalls or shows any signs of poor driveability.

Point is, with the thousands of factors that affect how well a car runs, venting is not significant. At least, with my car it isn't. Maybe I'm part of a lucky few that sees no ill effect, I don't know. So, if I got 0.03 mpg better and 0.02 seconds quicker if I recirculated, I'd rather keep the cool woosh sound. I certainly cannot see THE LOGIC in how people argue this topic so much and bash all of us who vent.

 

[shallowshowcase]

28.5 mpg? what is your car again?????

 

[Catbox_95]

28.5 mpg? what is your car again?????

I just got out of that thread where people were discussing their fuel mileage. I average 28.5 mpg. I'm not making that up. And, according to this site, I'm not getting the best mileage on here.

 

[shallowshowcase]

how many miles is that to a tank, im lucky to get 200 miles out of a tank

 

[oldman]

I certainly cannot see THE LOGIC in how people argue this topic so much and bash all of us who vent.

Because like you said, not everyone is as lucky as you. Most people who are still asking this question are most likely new to DSM, reason why they need to learn about the ill effects of venting so they don't post 20 new threads asking what's wrong with their cars. I'm not bashing you for venting, everyone is entitle to run their cars as they see fit, just don't think you should present it like it's totally ok to do without stating the facts first.

 

[napkinthief]

im n/a so no bash my newbie vent question but

is there a way to account for the lost air then let the injectors not send too much fuel?

 

[oldman]

im n/a so no bash my newbie vent question but

is there a way to account for the lost air then let the injectors not send too much fuel?

No wonder you got 830 on the SAT.

It's impossible to tune it out because you can let off the gas at any gear/rpm, the amount of lost air will also depend on temperature, intake pressure, how fast you shift.......too many variables.

 

[Catbox_95]

Because like you said, not everyone is as lucky as you. Most people who are still asking this question are most likely new to DSM, reason why they need to learn about the ill effects of venting so they don't post 20 new threads asking what's wrong with their cars. I'm not bashing you for venting, everyone is entitle to run their cars as they see fit, just don't think you should present it like it's totally ok to do without stating the facts first.

I just want to say thank you for closing an argument in a gentleman manor. Many people do not know how to have a healthy argument!

I want to make it clear that I am not saying that it is proper to vent. I agree that the PROPER thing to do is recirculate. People can read this thread and take it as they see fit. But you're right, there will be newbies reading this, and that is why I wanted to say that recirculating is the proper thing to do. To me, sometimes it seems like people are making it out to be like their car is about to blow up if they don't connect that blow off hose to recirculate.

 

[DSMcrazy3]

im n/a so no bash my newbie vent question but

is there a way to account for the lost air then let the injectors not send too much fuel?

To not vent..

Just wondering but why exactly DO people vent? the only reason i could see is for the sound...which is beautiful of course, but from what i hear, when a person who originally vented, recirculates. If they take off the tube and vent again, they get annoyed and wonder why they did it.

Also there was another thread about venting that stated you can configure a aluminum, or metal pipe of some sort(small diameter) and hook it up as the recirculation tube, and get the same sound, if not louder from the BOV, while still recirculating and getting the benefits.

Josh

 

[oldman]

I just want to say thank you for closing an argument in a gentleman manor. Many people do not know how to have a healthy argument!

I want to make it clear that I am not saying that it is proper to vent. I agree that the PROPER thing to do is recirculate. People can read this thread and take it as they see fit. But you're right, there will be newbies reading this, and that is why I wanted to say that recirculating is the proper thing to do. To me, sometimes it seems like people are making it out to be like their car is about to blow up if they don't connect that blow off hose to recirculate.

 

[Talon00b]

To not vent..

Also there was another thread about venting that stated you can configure a aluminum, or metal pipe of some sort(small diameter) and hook it up as the recirculation tube, and get the same sound, if not louder from the BOV, while still recirculating and getting the benefits.

Josh

nice im gonna do a quick search I just bought my first DSM (90 eagle Talon TSI AWD) and he has a big azz BOV but i wanna take that off and put the origianl on but he says he doesnt have it anymore so am i gonna have to run around the junk yard or what?
B

 

[Wicked96GS-T]

nice im gonna do a quick search I just bought my first DSM (90 eagle Talon TSI AWD) and he has a big azz BOV but i wanna take that off and put the origianl on but he says he doesnt have it anymore so am i gonna have to run around the junk yard or what?
B

There are many places where you can acquire a 1G BOV, such as: junkyards, the classifieds section here, DSMtrader, or even Ebay. You can probably sell your aftermarket BOV and pay for the stock one. You may even end up with some extra cash on the side.

 

[Defiant]

I am sure this has been asked a million times or explained, but I cant find the thread on this.

post #1, Frequently Answered DSM Questions

http://www.dsmtuners.com/forums/showthread.php?t=113858

How the hell did this last seven hours?