Would a BOV help a supercharger???
Would a BOV help a supercharger??? I know that a BOV (blow off valve) helps a turbo system, but would it help a supercharged system?
Are they normally used on stick shift cars?
Bill
Are they normally used on stick shift cars?
Bill
Launching!
Joined: Nov 2001
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From: St. Paul, MN
Re: Would a BOV help a supercharger??? I might be able to help here. I used to have a '99 GSX with highly modified engine. The bov is used to release pressure during a shift so that the wall of air doesn't blow through the throttle body (this can happen). I don't believe the 6-9 psi that a supercharger makes is enough to need a bov. My gsx was pushing 18-19.5 psi, let's just say there was a need for it!
Teching In
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From: Danielson, CT
Re: Would a BOV help a supercharger??? A blow off valve is used to prevent compresser surge. What happens is you go wide open throttle then when you shift the throttle plate closes this causes the incoming "boosted" air to basically hit a wall, the "shock" then travels back to the supercharger / turbo. THIS IS BAD, as the turbine is still trying to compress air and now it can't. It can cause damage to both a turbo and/or supercharger.
The blow off valve provides a place for the air to escape. Keep in mind this air is already "metered" in mass air controlled vehicles, so "venting" to the atmosphere is not a good idea, usually you will vent back into the intake circuit so the metered air just goes in a circle.
Hope this helps,
Chris
The blow off valve provides a place for the air to escape. Keep in mind this air is already "metered" in mass air controlled vehicles, so "venting" to the atmosphere is not a good idea, usually you will vent back into the intake circuit so the metered air just goes in a circle.
Hope this helps,
Chris
Re: Would a BOV help a supercharger??? [quote]Originally posted by Black LS1 T/A:
<strong>My ATI Procharger has a Purge Valve that relieves excess pressure after coming off the throttle. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Does it make a sound? I LOVE the sound of a whooshing BOV....
<strong>My ATI Procharger has a Purge Valve that relieves excess pressure after coming off the throttle. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Does it make a sound? I LOVE the sound of a whooshing BOV....
Adkoonerstrator
iTrader: (4)
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From: Deep in the seedy underworld of Koonerville
Re: Would a BOV help a supercharger??? Yep, mine does. It doesn't whistle like the ricers cars do but it is definately noticeable.
WOT.........Let off the gas...Phssssssttt! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> <img src="images/icons/grin.gif" border="0">
[ November 19, 2001: Message edited by: XLR8NSS ]</p>
WOT.........Let off the gas...Phssssssttt! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> <img src="images/icons/grin.gif" border="0">
[ November 19, 2001: Message edited by: XLR8NSS ]</p>
Re: Would a BOV help a supercharger??? [quote]Originally posted by 2000 Silver Z:
<strong>Keep in mind this air is already "metered" in mass air controlled vehicles, so "venting" to the atmosphere is not a good idea, usually you will vent back into the intake circuit so the metered air just goes in a circle.
</strong><hr></blockquote>
only if you put the BOV after the MAF, before the MAF and vent to atmosphere all you wnat <img src="images/icons/smile.gif" border="0">
<strong>Keep in mind this air is already "metered" in mass air controlled vehicles, so "venting" to the atmosphere is not a good idea, usually you will vent back into the intake circuit so the metered air just goes in a circle.
</strong><hr></blockquote>
only if you put the BOV after the MAF, before the MAF and vent to atmosphere all you wnat <img src="images/icons/smile.gif" border="0">
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Teching In
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From: Danielson, CT
Re: Would a BOV help a supercharger??? [quote]Originally posted by y2khawk:
<strong>
only if you put the BOV after the MAF, before the MAF and vent to atmosphere all you wnat <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
I'm unable to think of a configuration in which the MAS sensor would be on the high pressure side and would allow what you described. I'm not familier with the TT setups on the LS1's but on say a Vortech kit the MAS is on the low pressure side, so any venting of high pressure from post compressure side is alrady metered and would cause a rich condition due to the amount of air being lower then what the computer thinks is the there.
Just wondering if we are on the same page with this? Are you describing the same thing I am? Or is say on a TT setup the MAS is on the HIGH pressure side so you could vent pre-MAS sensor. <img src="images/icons/confused.gif" border="0">
Thanks,
CC
<strong>
only if you put the BOV after the MAF, before the MAF and vent to atmosphere all you wnat <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
I'm unable to think of a configuration in which the MAS sensor would be on the high pressure side and would allow what you described. I'm not familier with the TT setups on the LS1's but on say a Vortech kit the MAS is on the low pressure side, so any venting of high pressure from post compressure side is alrady metered and would cause a rich condition due to the amount of air being lower then what the computer thinks is the there.
Just wondering if we are on the same page with this? Are you describing the same thing I am? Or is say on a TT setup the MAS is on the HIGH pressure side so you could vent pre-MAS sensor. <img src="images/icons/confused.gif" border="0">
Thanks,
CC
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