BOV Question.

[95turbo4life]

How important is it for the blow off valve air to recirculate back into the intake? I currently have a 1g BOV on my FMIC setup and want to take the hose off going back into my intake for a louder noise. Also if I bought a type R or RS BOV it is unable to recirculate into the air intake with the tip that is put on it. I want to make sure it is nothing too important before doing it.

 

[rush2252]

How important is it for the blow off valve air to recirculate back into the intake? I currently have a 1g BOV on my FMIC setup and want to take the hose off going back into my intake for a louder noise. Also if I bought a type R or RS BOV it is unable to recirculate into the air intake with the tip that is put on it. I want to make sure it is nothing too important before doing it.

This one has been You cant vent to atmosphere unless you have the MAF translater the car will run like shit. If you want it to sound cool yeh it will work but you will get crazy amounts of boost spike at half throttle and performance will severly decrease. DSMs were tuned from factory to recirculate. IMO its better to be quiter and faster than louder and slower.

Welcome to the site go use your search function and search BOV recirculation by the google function. You will find all the answers you need

 

[jrohner]

Basically you'll run really rich whenever the BOV is open at all.

 

[95GSXCO]

Some run like crap some dont! I have mine vented and it runs just fine you get a little bit rich when you shift or let off the gas. To say you need a gm maf is wrong. Is it the correct way? Yes it is. I dont see how you say your performance will decrease! The only time it matters is when you close the throttle! That is if your BOV is not leaking. Half throttle problems I have none!

 

[jrohner]

I have my BOV crushed as much as I dared to go, and it works just fine, but yes it's a bit rich boosting at 1/2 throttle and when I first let off.

 

[blownturbotsi]

Not a smart idea if you want your car to run correctly. If you would rather run like shit to have the cool sound, go for it!

 

[rush2252]

Some run like crap some dont! I have mine vented and it runs just fine you get a little bit rich when you shift or let off the gas. To say you need a gm maf is wrong. Is it the correct way? Yes it is. I dont see how you say your performance will decrease! The only time it matters is when you close the throttle! That is if your BOV is not leaking. Half throttle problems I have none!

You try driving a 2g auto (which I do)with a BOV vented to atmosphere. I can ease into the throttle and build boost before I get into it. Its kinda like launching at the track but it makes it damn near impossible to cruise at 70. It Spikes alot on the autos. Maybe not the 5spds but def the autos. And the reason I say it reduces performance is because the MAF is showing X amount of air passing through it and the ECU responds by adjusting fuel trims when the air is then dumped instead of staying within the intake piping mani etc then you begin running pig rich. I would say if you ever Dyno the car try a few pulls with the BOV vented and then a few w it Recirc. think youd be surprised. PS your also in Colorado where altitudes etc probably have some impact on this.

 

[lacroixdp]

This one has been You cant vent to atmosphere unless you have the MAF translater the car will run like shit.

Having just the MAF translator won't do it for you - you need to set it up in blow-thru mode after the BOV. Alternatively, you can convert to speed density and vent to atmosphere safely as well. Make sure you cap off the return pipe on your intake plumbing so you aren't sucking in unfiltered air. Unless you do the steps above though, you're going to run rich and it's not recommended.

 

[chico904]

Honestly, the fact that you are changing from your 1G bov to a "type R or RS" BOV, already gives me the indication that you already have your mind set up. How important is it? You won't blow your engine doing it. Will you lose performance? Yes. It's up to you. Either be loud, while sacrificing performance and possibly idle, or be semi-loud, and have your engine running the correct A/F ratio.

 

[mindset]

This will be closed in

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[snowborder714]

Seriously, another venting question?

Closed.