Superman has parts on the way!
think it'll go kaboom? Lets make a poll, lol WGs are set for 8.7 psi but have the BOV will bleed off anything past 7 so it should run at 7#.
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Few questions...... was just thinking that by having the BOV bleed off the rest of the boost, at Full throttle and full boost, will my car be making the BOV noise the whole time while in full boost too? Not just letting off the gas?
Does anyone else run a setup that has the BOV bleed off boost?
Having the BOV at 7psi, if i want to run 12 in the future to say, will i need to change/swap out the BOV or is this one capable of it in some way? Thanks!
Does anyone else run a setup that has the BOV bleed off boost?
Having the BOV at 7psi, if i want to run 12 in the future to say, will i need to change/swap out the BOV or is this one capable of it in some way? Thanks!
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bump...?
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Originally Posted by Superman09
Few questions...... was just thinking that by having the BOV bleed off the rest of the boost, at Full throttle and full boost, will my car be making the BOV noise the whole time while in full boost too? Not just letting off the gas?
Does anyone else run a setup that has the BOV bleed off boost?
Having the BOV at 7psi, if i want to run 12 in the future to say, will i need to change/swap out the BOV or is this one capable of it in some way? Thanks!
Does anyone else run a setup that has the BOV bleed off boost?
Having the BOV at 7psi, if i want to run 12 in the future to say, will i need to change/swap out the BOV or is this one capable of it in some way? Thanks!
and you change it by changing springs dont you?
Just wondering because it will be bleeding off boost and im not sure about BOV's. WGs have springs, not sure how BOV's operate and what needs to be done to run more boost later.
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Well, honestly, i haven't heard of a BOV bleeding off like that, thought they only used to protect again turbo failure/surge.
However, it this is accurate, then it should make a whistling noise but like a complete purge since you are only purging the necesary amount of "boost" to maintain it at the preset level of 7psi. For example, the WG's purge at the desired boost level so i would expect a similar tone/purge but NOT the complete purge the BOV will yield when on boost and let off the throttle.
good question... maybe somebody else can add on this!!
GOOD, it must feel good getting all that sweet stuff. Can't wait, and congrates!!
No worries on the sig, im trying to figure it out on corel...
However, it this is accurate, then it should make a whistling noise but like a complete purge since you are only purging the necesary amount of "boost" to maintain it at the preset level of 7psi. For example, the WG's purge at the desired boost level so i would expect a similar tone/purge but NOT the complete purge the BOV will yield when on boost and let off the throttle.
good question... maybe somebody else can add on this!!
GOOD, it must feel good getting all that sweet stuff. Can't wait, and congrates!!
No worries on the sig, im trying to figure it out on corel...
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Why is it that you say the BOV will vent anything over 7#? What BOV is it, my work blocks your pictures... But no a BOV should Not bleed off pressure over a certain value. It has a Boost/Vacuum line plumbed into it so that it seals under boost and opens under vacuum. If it has a 7# spring in it, then at 7 PSI of Vacuum it will open. (about 15"hg.) So, you should NOT get any sound out of it while on boost. And if your springs are 8.7 psi, then you should get somewhere NEAR 8.7 psi if you don't run any type of boost controller...
Ryan K.
Ryan K.
Ok i think i got this figured out. Correct me if i'm wrong because i am not 100% sure. Not sure really what the 7 psi rating on the BOV is, but i think my car will run the 8.7 psi. I think the BOV will blow off at 7 psi IF there is no vacuum line set up to it to keep the spring down. So with vacuum, i don't think it will blow off at all until i let off the throttle, but if i didnt hook vacuum up to it, it would blow off at 7 psi. Correct me if i'm wrong? If i'm correct, what is the point really of having this spring rating?
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ok cool, thanks Ryan. The BOV is a Tial 50mm 7 psi
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so i wont see 7 psi of vacuum at all under heavy throttle then? Just making sure this will work fine. Not real knowledgeable on this vacuum stuff. If you can give me your thoughts and maybe a little senario of how this combo will work that would be great. 38mm wgs with .6 bar (8.7psi) and 50mm bov with 7 psi spring
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no cause your in positive manifold pressure. if you shifted lets say without having a blow off which is basically like a one way check valve it would cause your turbo to spin the other way and you would **** up a whole bunch of things.
your wastegate dictates how much boost you will run .
your wastegate dictates how much boost you will run .
ok cool, thanks. What really is the reason for BOV spring sizes then? Just curious...
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well, it would seem as if that spring contols the actuation of the valve. Therefore, if you have a larger spring, more seat pressure, there would be either/or both more control of the valve under higher boost pressure causing a controled purge and having the ability to hold off more boost before the valve opening before purge event and accidently bleeding off boost...
hmmm.. well, hold a sec. IS that what you meant bleeding off boost? It would seem, as a 7psi spring is a lite spring compared to the 23.8psi springs i have seen, that it would bleed off a bit with an increase in boost pressure.
lets marinate on this shall we.
hmmm.. well, hold a sec. IS that what you meant bleeding off boost? It would seem, as a 7psi spring is a lite spring compared to the 23.8psi springs i have seen, that it would bleed off a bit with an increase in boost pressure.
lets marinate on this shall we.
Well i think the spring is effect by vacuum pressure, not boost at all but i'm not sure. Lets marinate. 
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right, so it has NO effect of boost? If not then i dont really understand what the point is of having different pressure springs. oh well. Should 7 suit me well?
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no effect on boost, it just relieves the pressure, like ryan already stated the bigger the spring the more vacuum it will take to open it.
7 lbs of twin t 60's is not gonna last long on a stock block, lol.
try this website if it still dont makes sense www.howstuffworks.com
7 lbs of twin t 60's is not gonna last long on a stock block, lol.
try this website if it still dont makes sense www.howstuffworks.com