18 replies to this topic

[z31jaime]

ok from what i understand they both do the same thing.....

so which is better? i know the BOV gives you that cool WOOSH sound....but its almost 2x the money as an HD CBV.

is there any real performance gain for the BOV vs the CBV? I'm gonna be rebuilding my turbo and want to know what would be my best option. if its just a sound issue i guess ill go with the CBV cause i already have a cone filter and the WOOSH sound.

now if the BOV has some kind of performance added to it i might consider it.



car is a 95 850 wagon
plans for it...if they matter.
turbo rebuild with porting
tune
3"dp (already has 2.5" catback)
MBC

[Chilled Man]

sound

[Iloveboost]

^ +1 sound is the only difference. There is a thread on this on the posted threads in the performance section.

[z31jaime]

ok well from what i see, reading that post (thanks)

the BOV seems to be a more solid part not as prone to breakage. my current CBV has a small hole in it.

can anyone tell me if they have had issue with the HD CBV and what PSI its running?

i seen the kits IPD sells i think had a 20psi+ spring? so im guessing i should be fine with just my cbv replaced?

my worries is that i will replace the CBV and then it will break and then i will have to replace it again which will be = to buying 1 bov kit.

[Iloveboost]

The HD CBV will handle any PSI your car is going to put out. Not sure quite how the springs work but i believe there is 3. Maybe someone else can chime in but i know you cant just put in the stiffest spring or it will restrict boost i believe.

[magicaljake]

+1 to bov sound!!

woooooo---psh!!

[Iloveboost]

magicaljake, on 07 November 2009 - 11:24 PM, said:

+1 to bov sound!!

woooooo---psh!!

lol jake, i take it your liking yours?

[TryingBe]

If you worry about CBV breaking, get the BOV and be done with.

[z31jaime]

TryingBe, on 07 November 2009 - 11:46 PM, said:

If you worry about CBV breaking, get the BOV and be done with.

well thats what im asking...should i be worried about it....?

[ozzimark]

IMO, no. I'd only go with a recirculating BOV if I went to a new turbo that didn't have the CBV built in like the stock mitsus.

[pwebb]

the stock CBV is recirculating. if you want a BOV, keep it recirculated.

[Naughty33W]

pwebb, on 08 November 2009 - 12:32 AM, said:

the stock CBV is recirculating. if you want a BOV, keep it recirculated.

+1 ----- best answer

you dont have to have a bov vent to atmosphere (the air) - you can have it setup to pipe the air back in just like a cbv (or do both) - except the bov is more durable and less prone to failure (unless you get an ebay cheapo - then its hit or miss) then the cbv

but keep in mind that a bov thats venting to atmosphere is releasing metered air - the car has already added fuel in relation to that measured amount of air and will therefor get real rich for a second when the bov vents - cranking it up to redline then taking your foot off the gas might result in an overly rich condition and cause a stall - however flooring it through the gears works just fine , lol

[cheapwagon]

Just get an open intake style air cleaner setup ... you can hear the CBV just fine. Not as load as a BOV but is still can be heard.

[ryan850-t5]

Where do you recirculate the air back in?

[HeavyIron]

With IPD's Short ram intake my CBV is bordering on retarded loud. BOV's take the retardation to a ricer level.

[z31jaime]

sorry forgot to add already have the cone filter deal, so i know how loud the CBV is. thats why im going back and forth between it and the BOV, other than the whistle some of them make i wasn't understanding the point on spending $195 on a BOV kit when a $60 CBV seems to work the same. i know about the venting to atmosphere and the fuel mix thats also why i was not understanding the BOV thing. your going to mess with your air/fuel just for a cool sound??????????

i guess i was over thinking...i kept saying there had to be a reason other than sound that people went with BOV. i guess not.

[pwebb]

ryan850-t5, on 08 November 2009 - 05:51 AM, said:

Where do you recirculate the air back in?

between the MAF and the turbo inlet.

http://www.1st-racin...m/bov/bov_1.gif

[Naughty33W]

z31jaime, on 08 November 2009 - 06:09 AM, said:

i guess i was over thinking...i kept saying there had to be a reason other than sound that people went with BOV. i guess not.

its sound plus durability - not to mention that with the right bov it can handle 10psi , 20psi , 30psi and up - even if they make a cbv that can handle 30psi+ i would pick the bov of the two options strictly for duribility reasons - its up to you bro - but if you want the bov but DONT want the whoosh you can always port and polish the exhaust port on the bov and then vent it somewhere where the sound wont be as noticable (only works on bovs with the little horns for venting)

personally - once my boost levels break 15psi on my S60 , i'll be swapping to a bov (prolly a forge)

[ryan850-t5]

pwebb, on 08 November 2009 - 01:08 PM, said:

between the MAF and the turbo inlet.

http://www.1st-racin...m/bov/bov_1.gif

thanks pwebb