Safc and BOV dec air

[Dragonsi1]

i have a90 talon tsi and i wanted to vent to atmosphere i looked around but i couldb't find anything. the safc has a ne air function but im not sure what that does. when i am venting to atmosphere my car stalls when im off gas please help thanks

i think its called nec air but my settings under nec air are
throttle 0%
ne1 10.3%
ne2 10.0%

i have no idea what they mena can soeomep leas help htanks

 

[GSX90]

Originally posted by Dragonsi1
i have a90 talon tsi and i wanted to vent to atmosphere i looked around but i couldb't find anything. the safc has a ne air function but im not sure what that does. when i am venting to atmosphere my car stalls when im off gas please help thanks

i think its called nec air but my settings under nec air are
throttle 0%
ne1 10.3%
ne2 10.0%

i have no idea what they mena can soeomep leas help htanks

I think you mean dec air. This function is not for you if you are using a DSM MAS. Make sure you have it set to KARMAN type sensor only.

Also, DON'T vent to atmosphere. Connect that hose back into the intake.

 

[Dragonsi1]

yeah i meant dec but i want to vent!!!.
wait so how do i vent without cutting?

 

[Mike 99GSX]

Originally posted by Dragonsi1
yeah i meant dec but i want to vent!!!.
wait so how do i vent without cutting?

VPC or standalone!!!!

 

[Blk_99gst]

Originally posted by Mike 99GSX


VPC or standalone!!!!

OR gm maf translator, approx $300.

 

[Dragonsi1]

wait so if i got like an hks super sequential i'll still have the same problem with then engine cutting?

 

[nine5raptor]

yes

 

[Dragonsi1]

then... why would i get a bov? what if i raised the engine idle? or got it tuned then would it work?

 

[GSX90]

Originally posted by Dragonsi1
then... why would i get a bov? what if i raised the engine idle? or got it tuned then would it work?

You seem to be missing the point.

You get an aftermarket BOV so you can have the option of holding more boost via the adjustment screw, not for the loud sounds.

Sure, it would work if you connected your BOV dump back into the intake.

 

[2GStreeT]

hahah i remeber my stage of Venting Atms, soo stupid i was. The deal is dont vent to Atmosphere PERIOD. yes it sounds cool but thats not the point. Ya run rich waste gas. You will need a Standalone/VPC/GM-MAF to correctly vernt to Atm.

 

[IASDUDE]

Here is a fairly cheap solution for the people wanting to vent there BOV to the atmosphere. It helps with most of the problems associated with this practice. It also helps clean up poor idle quality if you are having those problems to. Here is the website for detailed information.

www.hesspower.com/products.htm

 

[kpt4321]

Do you want to tell me how the hesspower IAS will help you with a vented BOV? Because it won't.

Here's the deal. You can't use the SAFC dec-air, it only works on cars with speed density. You can't vent the BOV with the stock MAF. No. No. Not possible without suckyness.

No.


....Kyle T.

 

[IASDUDE]

By its design the IAS influences the WAS signal only at idle. This is done by simulating a signal similar to the signal generated by the actual MAS. This simulated signal can be varied slightly to attain the desired fuel mixture for the best idle quality. Two of the main problems with venting are poor idle quality or stalling and very rich mixture between shifts. As has been said probably hundreds of times when your venting a BOV to the atmosphere and the valve is under vacuum (Idle condition) it will leak extra air in the engine. This air is unmetered and causes a slightly lean condition causing an erratic idle. If the spring tention of the BOV is such that the valve is closed at high vacuum then this won't be a problem. If you have tghis issue it is taken care of by the IAS because the at Idle the IAS is controlling the Air signal the ECU sees and therefor you can adjust the mixture to obtain the best idle quality. The other issue I spoke of is the richness between shifts. The reason this occurs is due to the fact that the instant the boost is purged the turbo is still drawing air through the MAS instead of drawing the air after the MAS from the return tube as the factory system dictates. Basically this causes the ECU to think that the throttle plate is still open and the engine is till making torque and is not at an idle state. In that instant the ECU is thinking the engine is using all that air and adds fuel accordingly. Basically this is an error and the ECU is thinking the engine is in a different state then it really is. The engine is really at an idle state but the ECU thinks its not and injects a burst of fuel into the engine with almost no air to compliment it. resulting in the excessive rich condition. The IAS helps this because as soon as you take your foot totally off the gas pedal the signal sent to the ECU will be an idle signal so the ECU won't inject more fuel then is needed for idle. I'm out of time so I hope this helps. Any other question just ask or email.

 

[GSXTCY]

Originally posted by IASDUDE
Here is a fairly cheap solution for the people wanting to vent there BOV to the atmosphere. It helps with most of the problems associated with this practice. It also helps clean up poor idle quality if you are having those problems to. Here is the website for detailed information.

www.hesspower.com/products.htm

What havent you learned, you have been warned enough about posting nonsense comments like this. This is your last warning!

 

[kpt4321]

*highfive* for GSXTCY.

 

[LandoAWD]

I also like how he dodged Kyle's question and continued to spam.

 

[IASDUDE]

My responce to his question is directly under his post. I didn't dodge his question and I didn't spam. There is just no helping you people....

 

[LandoAWD]

No, thats a product endorsment. He stated that is in not possible to use Decel Air in addition to the BOV question. This was the thread topic. And, how many people take their foot "completely off" the gas when shifting?

 

[IASDUDE]

I'm pretty sure I do, especially when shifting rapidly. So thats one person that does. Besides, you don't have to take your foot totally off the gas to return to an Idle state once you have learned where the closed position is. I can't believe I replied to that....

 

[DBR01]

You can't vent the BOV with the stock MAF. No. No. Not possible without suckyness.

No.


....Kyle T.

Well I think you guys are avoiding the question. It is possible you just have to relocate the stock maf between the throttle body and the bov so that the maf only meters the air entering the engine. The whole reason that just putting a vented bov in doesn't work is because the car loses the metered air. Hence putting the maf behind the bov.

 

[Quasimondo]

Well I think you guys are avoiding the question. It is possible you just have to relocate the stock maf between the throttle body and the bov so that the maf only meters the air entering the engine. The whole reason that just putting a vented bov in doesn't work is because the car loses the metered air. Hence putting the maf behind the bov.

You do realize that it's a physical impossiblity, not to mention impractibility to try to stuff such a large sensor inbtween such narrow piping.

Which is why we use a GM maf in a blow-thru setup.

Which is what was already mentioned by Blk_99gst.

You're not covering new ground guy.

Not going to fit.

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Not going to fit.

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Is going to fit.

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[Coup D E'Tat]

Fitment is not the issue.

The DSM MAS is a draw-thru design, and as such cannot be placed in the intercooler piping.

And this is a mighty old thread.

 

[lein90tsi]

actually you can vent to atmosphere with the stock valve the only problem is the car will run very rich between shifts and it will be hard to cruise at a constant 120 on the highway because the valve will be partially open at mid throttle causing the car to stutter. all you have to do is bend the top of the 1st gen valve down enough so that it will stay shut at idle and light throttle but open when you let off the gas.i got a ball pein hammer and bent the top down about 1/4 inch.as an experiment i ran at the track with the valve vented and closed ,my results were that i lost .3 seconds off my e.t. while venting ..14.03@98 mph .and 13.73@101 because of the stutter between shifts .the car held an idle fine but i wont recommend venting for the most performance

 

[kottyking]

actually you can vent to atmosphere with the stock valve the only problem is the car will run very rich between shifts and it will be hard to cruise at a constant 120 on the highway because the valve will be partially open at mid throttle causing the car to stutter. all you have to do is bend the top of the 1st gen valve down enough so that it will stay shut at idle and light throttle but open when you let off the gas.i got a ball pein hammer and bent the top down about 1/4 inch.as an experiment i ran at the track with the valve vented and closed ,my results were that i lost .3 seconds off my e.t. while venting ..14.03@98 mph .and 13.73@101 because of the stutter between shifts .the car held an idle fine but i wont recommend venting for the most performance

Your still venting!! no no no no no

 

[marcmsj]

i'm one of those ignorant bastards that vent... i still whoop on v8's, so i'm happy