Bov?

[97espder]

Is the only way to have the bov release into the air is to get a gm maf and a maf translator or is the other options?

 

[Dave4g63]

im still using the stock 2g MAF. i have an Injen Intake pipe that dosen't allow me to recirculate so my BOV is Vented to the Atmosphere.

 

[Dewayne Waldron]

The only right way to do so is to run the maft, get dsmlink, or HKS VPC. It's not healthy to just run open to the atmosphere on the stock mas.

 

[talontd92tsi]

Is the only way to have the bov release into the air is to get a gm maf and a maf translator or is the other options?

This is not the ONLY way, but it is probably the EASIEST way to do it properly. Do not vent on a stock maf, your car will run rich (regardless of what other people tell you) and will make less power, have poor transient response between shifts and will probably stall quite often.

Other options to vent properly are

ECMlink (setup in Speed Density mode, or with Idle Airflow Clamp adjustments)
Ostrich using DSMAP or Jackal in a speed density mode
Speed density AEM setup

All of these options are more expensive than the MAF-T but are much more capable tuning devices too. Venting is kind of pointless (My car VTA's but still, its pointless) and unless you NEED the MAF-T (outflowing the stock MAS, or controlling larger injectors) that would kind of be pointless too. But its your $$ so whatever floats your boat.

 

[rarson]

im still using the stock 2g MAF. i have an Injen Intake pipe that dosen't allow me to recirculate so my BOV is Vented to the Atmosphere.

When did Injen start making them without recirc tubes? I ask because the one I bought 10 years ago had a recirc tube on it.

I switched back to the stock snorkel a long time ago and use a modded 1g BOV recirculated. That thing is extremely loud. I definitely wouldn't need it any louder than it already is. The only benefits I can see to not recirculating is if you've got a BOV that can't, like the Tial, or if you've got some custom piping that makes recirculating a pain in the ass. A lot of air comes out of the BOV, so it's kind of a waste not to direct it back towards the turbo inlet.

 

[jrohner]

You can get the intake pipe either way. My BOV sounds almost exactly the same vented or recirculated, but if you're just looking to make your BOV louder you're definitely a ricer.

 

[LiquidX]

Speed density or using a GM Maf in blowthrou wether it's used via link of the MAFT. Those are the only 2 ways of venting properly othewise you will run rich regardless of what you believe. If you have a leaking BOV your car will also bog and stall out. The 2g MAF is good for around 500hp until it's a restriction. ALL BOVs can be recirulated so there isn't an excuse not to recirculate

 

[codeofdastreets]

You can get emclink and run a gm maf without a translator.. Ecmlink offers a cable that connects into the stock harness nd connects straight into the gm maf..

 

[bagged420a]

ALL BOVs can be recirulated so there isn't an excuse not to recirculate

Not true, some BOV's don't have a recirc outlet

 

[LiquidX]

Not true, some BOV's don't have a recirc outlet

Yes, they ALL can if you have the money to get them welded

 

[rarson]

Yes, they ALL can if you have the money to get them welded

Yeah, right. I'd love to see you weld an aluminum body around a Tial BOV.

You've never seen one of these before, have you?
TiAL Sport.com

 

[LiquidX]

Yeah, right. I'd love to see you weld an aluminum body around a Tial BOV.

You've never seen one of these before, have you?
TiAL Sport.com

I have, and anything is possible with the right knowladge, skills and tools. Besides, you wouldn't buy one of those if you had thoughts of recirculating anyway.

 

[rarson]

Besides, you wouldn't buy one of those if you had thoughts of recirculating anyway.

Exactly, but that's not what you said. You said that all BOVs can recirculate.

 

[kenuwine4g63]

IDK, my apexi bov isnt recirculated and it dosnt bog, stall or any of that. I dont have a gm translator either. I bought the car like that and was like man it probably runs like s***. But when i drove it, it drove fine, But i dont like it cause its very ricey..putting my old crushed 1g bov back on and recirculated.

 

[LiquidX]

Exactly, but that's not what you said. You said that all BOVs can recirculate.

Yes I know what I said and it's still true, any BOV CAN be recirculated, but the ones that are setup for venting would be a hassle but it CAN be done. Hence why I then stated that if you wanted to get that TiAL BOV you wernt thinking of recirculating in the first place although it's still possible to weld it.

IDK, my apexi bov isnt recirculated and it dosnt bog, stall or any of that. I dont have a gm translator either. I bought the car like that and was like man it probably runs like s***. But when i drove it, it drove fine, But i dont like it cause its very ricey..putting my old crushed 1g bov back on and recirculated.

Some DSMs don't show problems when it's vented, but you are still venting metered air to the atmosphere which will cause you to run rich for when it blows open.

 

[Marty Staggs]

ECM link and a progressive dual port BOV would be ideal.

 

[kenuwine4g63]

Some DSMs don't show problems when it's vented, but you are still venting metered air to the atmosphere which will cause you to run rich for when it blows open.[/QUOTE]


Yea i figured that. But it also has 550cc's in it and is already runing richer than bill gates and jay-z combined..But I will tune it as soon as my wideband comes in..And yes it recirculated now.

 

[MM's Talon]

my tial bov sounds great on a stock maf but im running 18 psi

 

[rarson]

Hence why I then stated that if you wanted to get that TiAL BOV you wernt thinking of recirculating in the first place although it's still possible to weld it.

I don't see what you're getting at, because you originally stated that there wasn't an excuse not to recirculate. Certainly, on a high-horsepower car pumping tons of air, the need to release a large volume of air outweighs any need to recirculate.

I agree with you: the majority of street cars out there don't need huge BOVs and can easily recirculate, and they should. But there ARE pros and cons to both and valid reasons for which one might decide not to recirculate.

 

[LiquidX]

I don't see what you're getting at, because you originally stated that there wasn't an excuse not to recirculate. Certainly, on a high-horsepower car pumping tons of air, the need to release a large volume of air outweighs any need to recirculate.

I agree with you: the majority of street cars out there don't need huge BOVs and can easily recirculate, and they should. But there ARE pros and cons to both and valid reasons for which one might decide not to recirculate.

On a high HP car, there are still options to recirculate regardless. The need to bypass a larger volume is when you are pushing high CFM numbers with high boost. Even then, you would goto a larger sized BOV and you can still recirculate because it's still bypassing the turbo outlet to prevent surge.

I said there isn't a reason not to recirculate because any BOV can be made to recirculate and I don't quite understand why you have to argue with that fact. Overall it is your choice on wether you vent or not and most people on here are NOT going to be pushing enough air to require the use of the large BOV or goto a dual setup.

Outside of that power range, the only reason to vent would be for sound unless you can give me a logical reason why venting is better? You actually cause a little bit of "lag" when you vent because that puff of air helps keep the turbo spinning faster in between shifting so you can hit your boost quicker.

If you dissagree with any of this, please, let me know, but this is becoming a pointless argument which shouldn't have started in the first place.

http://www.dsmtuners.com/forums/hangout/336295-science-not-venting-atmosphere.html

 

[rarson]

I said there isn't a reason not to recirculate because any BOV can be made to recirculate and I don't quite understand why you have to argue with that fact.

Because there's no reason to ruin a perfectly good Tial 50mm by hacking it up to make it recirculate. The BOV wasn't designed for that.

Outside of that power range, the only reason to vent would be for sound unless you can give me a logical reason why venting is better?

I wasn't arguing that someone who didn't need the flow capacity of a larger BOV has any reason to vent to atmosphere. What I'm saying is that there are some reasons why I might, in some circumstances, vent rather than recirculate. If I need extra flow capacity, I'm not going to go out of my way to hack up a BOV just to make it recirculate. Especially not when it's no longer necessary to recirculate for tuning reasons.

You actually cause a little bit of "lag" when you vent because that puff of air helps keep the turbo spinning faster in between shifting so you can hit your boost quicker.

Maybe a little bit, but I doubt the average person would notice, and in a race situation, if you have something like DSMLink, you don't even need to shut the throttle between shifts, so that becomes a moot point.

I always recommend to people that they recirculate their BOV but I wouldn't go so far as to say that there is NO reason to vent to atmosphere, nor would I say that ALL BOVs can recirculate.

 

[LiquidX]

Because there's no reason to ruin a perfectly good Tial 50mm by hacking it up to make it recirculate. The BOV wasn't designed for that.

You still fail to understand that all I was saying is that any BOV can be modified to recirculate but yet you need to go on and on about this.
No it wasn't designed to recirculate but it can still be modified if you CHOOSE to or just get a new BOV.

I wasn't arguing that someone who didn't need the flow capacity of a larger BOV has any reason to vent to atmosphere. What I'm saying is that there are some reasons why I might, in some circumstances, vent rather than recirculate. If I need extra flow capacity, I'm not going to go out of my way to hack up a BOV just to make it recirculate. Especially not when it's no longer necessary to recirculate for tuning reasons.

1. Name some circumstances where venting is the way to go.
2. I never once said to go out of your way. I merely stated that ANY BOV can be altered. Is it always cost effictive or worth it, no.
3. You can get a BOV to suite any application wether it's vented or recirculated so your basis is of needing extra flow is out.

Maybe a little bit, but I doubt the average person would notice, and in a race situation, if you have something like DSMLink, you don't even need to shut the throttle between shifts, so that becomes a moot point.

Not everyone has Link or has the abilit to utilize NLTS. If you read that link I sent you, one member claimed a 1-2 PSI loss between shift venting due to the pressurized air not spooling up the turbo as it does recirculated.

I always recommend to people that they recirculate their BOV but I wouldn't go so far as to say that there is NO reason to vent to atmosphere, nor would I say that ALL BOVs can recirculate.

Unless you want the "cool" factor for sound, there really isn't a reason at all and the second is still true IF you choose to make them recirculate; again, it may not be cost effective or worth it but it can still be done.


Just stop with this argument and this was my final post to this issue since I don't want to keep repeating myself.

 

[Matty-D]

How about the fact that IF properly tuned that rich spike can cool the engine without causing a misfire, incomplete burn, bog, etc.?!? This can be a good thing if you are hitting a road track!

 

[LiquidX]

How about the fact that IF properly tuned that rich spike can cool the engine without causing a misfire, incomplete burn, bog, etc.?!? This can be a good thing if you are hitting a road track!

If properly tuned, that situation wouldn't be an issue as the tune would be for your setup. Having just that little bit of gas sprayed into the chamber when the throttle is released won't do much for the temp. anyway.

You will still have an incomplete burn as there is unburnt fuel and bog(assuming said vehicle does it as some don't). Misfiring wasn't an issue when people don't vent properly.

 

[chaggard27]

Also wouldnt that new air coming out under pressure help out the turbo? After all when recurculated from the bov it goes right back into the inlet pipe right in front of the turbo essecially feeding the turbo with extra air. Without that extra air I would assume that your turbo would need to work harder/be spooled more in order to work as efficient...just a thought...