turbo whistle or supercharger whine?

[Lunchbocks 10+ year member]

i've always liked turbos myself, first car got me into that opinion but between an externally gated 70mm+ going over 30lbs with an engine thats got a long rpm range and a vented blow off, and a bb with a 1271 bigass with zoomies or a streetable centrifugal equipped engine with a release valve ****... those are all good sounding but i'm partial to turbos in almost any debate

 

[bass_lover1 10+ year member]

Yes a diverter may be better than a BOV, But no a BOV is not just a sound. Thats quite possibly the most ignorant thing i've ever heard, and sounds like it came straight from the marketing team of whoever you bought your recirc setup from.
No, a BOV is not the end all be all to turbos, it has its trade offs like everything else. But, I NEVER had a problem with mine causing rich conditions, and i was at 14psi. Not sure how your mafs work, but my dodge had a map, (manifold air pressure), perhaps thats the reason. Research shows that a lot of cars do have rich problems(still no dodges that i found), but nobody on my dodge forums has ever mentioned a problem with them. I (read used to) know tons of people running 12sec cars that all ran BOVs, these are people that dyno their cars after even the simplest of changes, if a BOV didn't increase performance, it wouldn't have been on the car, but nobody removed them. Instead they found ways to make them better. I personally noticed a huge difference in the boost that I had after a shift, but thats seat of my pants and watching the boost gauge's needle, not hardcore numbers.

3am...too much thinking

Well since my car came with a recirc. setup I'm gonna say the people that designed my car know more about it than you do //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif.

BOVs do not add any power, period. They act like a DV...i'm sure you know why they are there in the first place, I wont go into that. The only other thing a BOV might be good for, besides the noise, is you might have a lower pressure drop between shifts, but thats it.

Niether a DV or BOV will gain you any hp or tq numbers...they might help you from LOSING any power...a leaky valve is an example...but by them selves they make a noise, thats it.

 

[Lunchbocks 10+ year member]

i just noticed the argument

a real common thing to do with a mas car using a bov is the run whats called a blow thru setup which puts the nass air after the blowoff, so you're no longer releasing previously metered air

recirculating is a mild street car type of thing i think... notice how many well built cars dont even have any intake system before the compressor wheel and dont have anything coming off there choice of relief valve

i see recirculating valves going back to an intake pipe prior to the compressor, you really think thats keeps any kind of boost in the charge piping more than a vented bov... really doubt it, the air must once again get past that little spinny thing. not to mention a high boosted application recirculating to close to the mas can actually momentarily fight fresh air charge.

/end rant, sorry ive been bored cuz im home with some injuries and dont get to talk cars with anyone, u can ignore me if u want

 

[marleyskater420 5,000+ posts]

i just noticed the argumenta real common thing to do with a mas car using a bov is the run whats called a blow thru setup which puts the nass air after the blowoff, so you're no longer releasing previously metered air

recirculating is a mild street car type of thing i think... notice how many well built cars dont even have any intake system before the compressor wheel and dont have anything coming off there choice of relief valve

i see recirculating valves going back to an intake pipe prior to the compressor, you really think thats keeps any kind of boost in the charge piping more than a vented bov... really doubt it, the air must once again get past that little spinny thing. not to mention a high boosted application recirculating to close to the mas can actually momentarily fight fresh air charge.

/end rant, sorry ive been bored cuz im home with some injuries and dont get to talk cars with anyone, u can ignore me if u want

Yeah but most of those cars don't even use mafs.

 

[bass_lover1 10+ year member]

i just noticed the argumenta real common thing to do with a mas car using a bov is the run whats called a blow thru setup which puts the nass air after the blowoff, so you're no longer releasing previously metered air

recirculating is a mild street car type of thing i think... notice how many well built cars dont even have any intake system before the compressor wheel and dont have anything coming off there choice of relief valve

i see recirculating valves going back to an intake pipe prior to the compressor, you really think thats keeps any kind of boost in the charge piping more than a vented bov... really doubt it, the air must once again get past that little spinny thing. not to mention a high boosted application recirculating to close to the mas can actually momentarily fight fresh air charge.

/end rant, sorry ive been bored cuz im home with some injuries and dont get to talk cars with anyone, u can ignore me if u want

I'm not saying either one is better than the other, I'm just saying niether will gain you anything performance wise.

I stuck with a DV because it's the way my car was designed, and I've seen the proof that running rich because of a BOV in my model car causes oil contamination.