Bov
11-22-2012, 01:49 AM
#1
Registered User
Thread Starter
Join Date: Nov 2012
Posts: 19
Bov
Im hearing rumors on BOV's good and bad, i understand ill run rich in between shifts but is it damaging. I also see there are hybrid BoV's 50-50% atmospheric and recirculating. Does this reduce the rich fuel to O2 mix? Opinions?
11-22-2012, 02:25 AM
#4
i wouldnt necessarily say they are pointless. but maybe not worth the trouble. some things are just worth leaving stock, trusting the engineers. other than that, read up some articles on the basics of a BOV then ask some more in detail questions. after reading up id say u might have abetter idea of what it does and what it COULD do to your engine should u switch to aftermarket. this doesnt just apply in your case but others as well. goodluck. im sure ull find the help u need via web/ i clubbers 
11-22-2012, 07:47 AM
#5
Unless your running huge amounts of boost and power, you don't have need one. Also it is only wise to run a BOV on our cars if your either running a Blow Thru Setup or Speed Density. On a stock car it would hurt performance.
11-22-2012, 08:21 AM
#6
Technical Know-It-All
Join Date: Oct 2003
Location: Sterling, VA
Posts: 2,123
Car Info: '02 WRX + '15 WRX
Stock valves
- Free
- Reliably holds ~21 psi
- Can be crushed to hold up to 30 psi
- Does not require any set up or maintenance
- Recirculates air that your ECU is accounting for whenever you come out of boost
- This recirculated puffs back into the intake tract right in front of the turbo and helps keep it spinning between shifts slightly reducing turbo lag
Aftermarket
- Costs $$$
- Hold varying amounts of boost
- Often leak because they are not set up properly, no/improper maintenance is performed on them (both user error), or because they are poorly designed
- If it vents you're not getting that air that the ECU expects you'll run momentarily rich (won't kill anything....you may slightly bog and you'll need to replace your spark plugs sooner) and you're not getting that help in keeping the impeller spinning
- People with loud, venting valves often get laughed at for having something to make a whoosh sound by auto enthusiasts.
- Free
- Reliably holds ~21 psi
- Can be crushed to hold up to 30 psi
- Does not require any set up or maintenance
- Recirculates air that your ECU is accounting for whenever you come out of boost
- This recirculated puffs back into the intake tract right in front of the turbo and helps keep it spinning between shifts slightly reducing turbo lag
Aftermarket
- Costs $$$
- Hold varying amounts of boost
- Often leak because they are not set up properly, no/improper maintenance is performed on them (both user error), or because they are poorly designed
- If it vents you're not getting that air that the ECU expects you'll run momentarily rich (won't kill anything....you may slightly bog and you'll need to replace your spark plugs sooner) and you're not getting that help in keeping the impeller spinning
- People with loud, venting valves often get laughed at for having something to make a whoosh sound by auto enthusiasts.
11-22-2012, 08:56 AM
#7
Stock valves
- Free
- Reliably holds ~21 psi
- Can be crushed to hold up to 30 psi
- Does not require any set up or maintenance
- Recirculates air that your ECU is accounting for whenever you come out of boost
- This recirculated puffs back into the intake tract right in front of the turbo and helps keep it spinning between shifts slightly reducing turbo lag
Aftermarket
- Costs $$$
- Hold varying amounts of boost
- Often leak because they are not set up properly, no/improper maintenance is performed on them (both user error), or because they are poorly designed
- If it vents you're not getting that air that the ECU expects you'll run momentarily rich (won't kill anything....you may slightly bog and you'll need to replace your spark plugs sooner) and you're not getting that help in keeping the impeller spinning
- People with loud, venting valves often get laughed at for having something to make a whoosh sound by auto enthusiasts.
- Free
- Reliably holds ~21 psi
- Can be crushed to hold up to 30 psi
- Does not require any set up or maintenance
- Recirculates air that your ECU is accounting for whenever you come out of boost
- This recirculated puffs back into the intake tract right in front of the turbo and helps keep it spinning between shifts slightly reducing turbo lag
Aftermarket
- Costs $$$
- Hold varying amounts of boost
- Often leak because they are not set up properly, no/improper maintenance is performed on them (both user error), or because they are poorly designed
- If it vents you're not getting that air that the ECU expects you'll run momentarily rich (won't kill anything....you may slightly bog and you'll need to replace your spark plugs sooner) and you're not getting that help in keeping the impeller spinning
- People with loud, venting valves often get laughed at for having something to make a whoosh sound by auto enthusiasts.
11-22-2012, 09:53 AM
#10
Registered User
iTrader: (7)
Join Date: Mar 2011
Location: The Bay Area
Posts: 2,572
Car Info: 2006 STI
whats this? a post where everyone isn't flaming thew OP, saying Search "noob". AWESOME
Here is some good info by Unibomber on Nasioc
HAPPY THANKS GIVING PEOPLE!!!!
Here is some good info by Unibomber on Nasioc
HAPPY THANKS GIVING PEOPLE!!!!
11-22-2012, 10:44 AM
#11
Technical Know-It-All
Join Date: Oct 2003
Location: Sterling, VA
Posts: 2,123
Car Info: '02 WRX + '15 WRX
Don't read my posts very often?
Upon searching the OP's post, he is getting a 2013. You'll have a plastic BPV which is not as good as the older metal ones. A lot of people have seen them start leaking at regular stage 2 boost levels. If you want something that works I recommend sticking with a 100% recirculating valve. An example that I might recommend is a Forge valve. They are fairly inexpensive. You will have to perform some up-keep.
Upon searching the OP's post, he is getting a 2013. You'll have a plastic BPV which is not as good as the older metal ones. A lot of people have seen them start leaking at regular stage 2 boost levels. If you want something that works I recommend sticking with a 100% recirculating valve. An example that I might recommend is a Forge valve. They are fairly inexpensive. You will have to perform some up-keep.
Last edited by Brfatal; 11-22-2012 at 10:46 AM.
11-22-2012, 01:18 PM
#12
Forge or turbosmarts my choice or the new GFB.
Those plastic ones hold a "stage 2" set up with no issues. Now if you want to go above 19psi which most won't on that tune.... You'll be fine. Worry about your intercooler before ANYTHING ELSE!
Those plastic ones hold a "stage 2" set up with no issues. Now if you want to go above 19psi which most won't on that tune.... You'll be fine. Worry about your intercooler before ANYTHING ELSE!
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