Fact or Fiction - No BOV = Bad?
01-05-2013, 12:33 PM
#12
Senior Member
Join Date: 04-03-2009
Location: atlanta, ga
Posts: 707
I get the fealing that many think of a BOV as the atmospheric ones that make the loud sound. Not all BOV's blow off to atmosphere. You can get BOV's that work in a recirc setup. Even the Greddy's have different nozzles that can be put on them to vent to atmosphere or to recirc.
01-06-2013, 05:46 AM
#13
Senior Member
Join Date: 10-06-2011
Location: Mesa, AZ
Posts: 1,150
I know they csn be recirculated. But again the only real reason to change the stock bpv recirc setup is a big turbo setup or if you like the sound. Why go from the stock setup and spend 400 bucks on a recirc setup? Doesnt make sense....its just spending money on nothing.
I never mentioned anything about when or why you would change it. I merely pointed out that BOV's are not always for the sound as they do not have to blow off to atmosphere.
$400 for a BOV??? EEEKKKKK.. You can get the block off plate for the factory one for $36 then around $100 for a name brand BOV and down to $40 for the average copy on ebay. The another $30 or so for a pipe with the correct flange.
01-06-2013, 11:36 AM
#14
Senior Member
Join Date: 04-03-2009
Location: atlanta, ga
Posts: 707
I never mentioned anything about when or why you would change it. I merely pointed out that BOV's are not always for the sound as they do not have to blow off to atmosphere.
$400 for a BOV??? EEEKKKKK.. You can get the block off plate for the factory one for $36 then around $100 for a name brand BOV and down to $40 for the average copy on ebay. The another $30 or so for a pipe with the correct flange.
$400 for a BOV??? EEEKKKKK.. You can get the block off plate for the factory one for $36 then around $100 for a name brand BOV and down to $40 for the average copy on ebay. The another $30 or so for a pipe with the correct flange.
A tial q is $240
Block off is 35
Recirc or tial q is 40
Flange for tial q is 25
Fee to weld flange and recirc fitting (need aftermarket metal intake here and assuming you already have upgraded piping) 75....not to mention repowdercoating where the fittings were welded.
Total...415 for a recirc assuming you already had aftermarket metal charge piping and an aftermarket metal intake. Yeah a vent to atmosphere setup will be a bit cheaper but yes my ballpark figure was correct
01-06-2013, 04:37 PM
#15
Senior Member
Join Date: 10-06-2011
Location: Mesa, AZ
Posts: 1,150
Correct but on our application the only 2 reasons to change from the stock setup is big turbo or sound. Really no need to argue this point.
A tial q is $240
Block off is 35
Recirc or tial q is 40
Flange for tial q is 25
Fee to weld flange and recirc fitting (need aftermarket metal intake here and assuming you already have upgraded piping) 75....not to mention repowdercoating where the fittings were welded.
Total...415 for a recirc assuming you already had aftermarket metal charge piping and an aftermarket metal intake. Yeah a vent to atmosphere setup will be a bit cheaper but yes my ballpark figure was correct
A tial q is $240
Block off is 35
Recirc or tial q is 40
Flange for tial q is 25
Fee to weld flange and recirc fitting (need aftermarket metal intake here and assuming you already have upgraded piping) 75....not to mention repowdercoating where the fittings were welded.
Total...415 for a recirc assuming you already had aftermarket metal charge piping and an aftermarket metal intake. Yeah a vent to atmosphere setup will be a bit cheaper but yes my ballpark figure was correct
Last edited by 07azhhr; 01-06-2013 at 06:20 PM.
01-12-2013, 05:14 AM
#16
Senior Member
Join Date: 01-28-2008
Location: INDIANA
Posts: 355
You've got it. Any boosted motor has to do something with boost when the throttle closes. In a modern EPA regulated motor blowing off excess boost is illegal if it goes into the atmosphere.
Just because it's not labeled as BOV doesn't mean there is not an internal way to dump pressure somewhere...then the excess is fed back into the motor to be burned.
Just because it's not labeled as BOV doesn't mean there is not an internal way to dump pressure somewhere...then the excess is fed back into the motor to be burned.
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