Do I NEED a blow off?
06-04-08, 10:19 PM
#28
Where do you draw the line at "Need"?
Do you "Need" to run an air filter on your intake? Well no, you don't. But then why do 99.9% of cars in existance come with some sort of intake filter? Because it promotes engine longevity.
Do you "Need" to run at least 91 octane in an rx7? Nope, you can run 87 just fine. But again, nobody does. Do you "Need" a boost control mechanism? Well no, you could leave the wastegate closed and just pedel the throttle.
Do I "Need" to get out of bed and haul my *** to work Monday-Friday? No way man, I could sleep the day away. But its impractical.
So do you need some type of pressure relief on a turbo system? Yes, you need one. Why? Well simply because it would be pretty retarded not to.
Do you "Need" to run an air filter on your intake? Well no, you don't. But then why do 99.9% of cars in existance come with some sort of intake filter? Because it promotes engine longevity.
Do you "Need" to run at least 91 octane in an rx7? Nope, you can run 87 just fine. But again, nobody does. Do you "Need" a boost control mechanism? Well no, you could leave the wastegate closed and just pedel the throttle.
Do I "Need" to get out of bed and haul my *** to work Monday-Friday? No way man, I could sleep the day away. But its impractical.
So do you need some type of pressure relief on a turbo system? Yes, you need one. Why? Well simply because it would be pretty retarded not to.
-J
06-06-08, 02:51 AM
#33
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So after reading all this....what if you simply want to disconnet the factory bov to get some compressor surge sound 
Just disconnet the factory pipe and plug up the hole in the factory airbox and the hole at the end of the factory bov hose?
Just disconnet the factory pipe and plug up the hole in the factory airbox and the hole at the end of the factory bov hose?
06-06-08, 10:54 AM
#34
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100k+? That seems unlikely. Who even remembers that far back? My friend recently told me she ran into Kanye West at the mall and he asked her to go back to his hotel with him. I told her this was unlikely.
Answer me this. If re-circ valves are so useless, then why are they still being put on brand new forced induction vehicles? If motor companies can save $1 on the production of a vehicle, then they would do so in a heart-beat. The material costs for these valves arn't free, and the engineering certainly isn't free either.
Bottom line, if I can get even an extra 10k out of my $4k turbo system because I spent $50 putting in a stupid re-circ valve, then you can sure bet I'll spend the $50.
And if the man wants his rx7 to be quiet, then going without a re-circ is NOT the way to go. Have you ever heard compressor surge at 1bar? That sound would annoy the crap out of me way more than the sound of a BOV would. The re-circ valve is the quietest solution by far.
So yes, you do need a BOV/re-circ. Unless as suggested you plan on racing for the cup. Then you might have some type of BOV related catastrophic failure costing you the fame, fortune, and women.
Answer me this. If re-circ valves are so useless, then why are they still being put on brand new forced induction vehicles? If motor companies can save $1 on the production of a vehicle, then they would do so in a heart-beat. The material costs for these valves arn't free, and the engineering certainly isn't free either.
Bottom line, if I can get even an extra 10k out of my $4k turbo system because I spent $50 putting in a stupid re-circ valve, then you can sure bet I'll spend the $50.
And if the man wants his rx7 to be quiet, then going without a re-circ is NOT the way to go. Have you ever heard compressor surge at 1bar? That sound would annoy the crap out of me way more than the sound of a BOV would. The re-circ valve is the quietest solution by far.
So yes, you do need a BOV/re-circ. Unless as suggested you plan on racing for the cup. Then you might have some type of BOV related catastrophic failure costing you the fame, fortune, and women.
.Who needs to remember that far back? isn't that what odometers are for?
. These people had absolutely no reason to lie about the mileage on their turbo setups, so i see no reason not to believe them. The fact that garrett supports their claims that the BB series turbos were designed for that abuse is all the more reason to believe them, unless you're claiming to know more about turbo design than garrett?Lastly if you go back and actually read my post I was really just correcting your responses inaccuracies. But if you notice at the end I did mention that if he wanted a quiter setup he should look into a recirc valve (oh gosh!).
06-06-08, 01:48 PM
#35
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Lots of opinions... Again you do not need to run a BOV it is purely a choice. If you don't run a BOV your car will still start, still boost, and still drive down the road, PERIOD. Most factory turbos were not designed to withstand long term compressor surge, which means if auto manufacturers want to guarantee the turbo will outlive the warranty a cheap recirc valve is a small price to pay. Not running a BOV would certainly not result in an entire "$4K turbo setup" failing. At worst you would have premature seal/bearing failure and require a rebuild or another turbo, whichever is cheaper. Also considering BOV/recirc's tend to fail as well it might end up being cheaper in the long run if you have a turbo that can easily withstand compressor surge. There is a big difference between a necessity ("need"), and your opinion, whether you realize it or not .
Who needs to remember that far back? isn't that what odometers are for?. These people had absolutely no reason to lie about the mileage on their turbo setups, so i see no reason not to believe them. The fact that garrett supports their claims that the BB series turbos were designed for that abuse is all the more reason to believe them, unless you're claiming to know more about turbo design than garrett?
Lastly if you go back and actually read my post I was really just correcting your responses inaccuracies. But if you notice at the end I did mention that if he wanted a quiter setup he should look into a recirc valve (oh gosh!).
.Who needs to remember that far back? isn't that what odometers are for?
. These people had absolutely no reason to lie about the mileage on their turbo setups, so i see no reason not to believe them. The fact that garrett supports their claims that the BB series turbos were designed for that abuse is all the more reason to believe them, unless you're claiming to know more about turbo design than garrett?Lastly if you go back and actually read my post I was really just correcting your responses inaccuracies. But if you notice at the end I did mention that if he wanted a quiter setup he should look into a recirc valve (oh gosh!).
At worst you would have premature seal/bearing failure and require a rebuild or another turbo, whichever is cheaper.
Please show me where I've corrected my inaccuracies. The only reason I've re-stated my points is because they obviously were not stated in simple enough terms the first time.
The guy asked for a straight up, no bullshit answer (if you read the post). Everybody responded with the stupid and blunt obvious answer of "no, but you know it's probably a good idea." I simply skipped the bullshit and stupidity and answered "yes, because its a good idea".
06-07-08, 11:22 AM
#38
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Or you could avoid the chance of premature seal/bearing failure by not being a doink and just putting a circ valve on.
Please show me where I've corrected my inaccuracies. The only reason I've re-stated my points is because they obviously were not stated in simple enough terms the first time.
The guy asked for a straight up, no bullshit answer (if you read the post). Everybody responded with the stupid and blunt obvious answer of "no, but you know it's probably a good idea." I simply skipped the bullshit and stupidity and answered "yes, because its a good idea".
Please show me where I've corrected my inaccuracies. The only reason I've re-stated my points is because they obviously were not stated in simple enough terms the first time.
The guy asked for a straight up, no bullshit answer (if you read the post). Everybody responded with the stupid and blunt obvious answer of "no, but you know it's probably a good idea." I simply skipped the bullshit and stupidity and answered "yes, because its a good idea".
. You gave a generalized answer and passed it off as fact. No a BOV is NOT required on a turbo setup, and in some cases (BB center sections) it's not even unreliable! At this point it's blatently obvious you were unaware of that fact and seem to be having massive issues admiting you were wrong!Who's everybody? Mahjik?
. His response was the only one countering what you had said and was entirely accurate. Again you need to choose your words a little more wisely, it's what made your statement innaccurate in the first place!Maybe you should go back and read what the OP wanted to hear. Not only did you go against his request to avoid any wise *** comments, you provided absolutely no credible information on the subject past your obviously uneducated opinion and generalized comments. Bottom line you do not NEED to run a BOV, many people have proven this over the years and a prominent turbo company supports it, get your head out of your *** and accept that you could possibly be wrong...
06-07-08, 12:17 PM
#39
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girls... girls 
maybe this will help:
http://en.wikipedia.org/wiki/Blow-off_valve
http://www.carblog.co.za/2006/09/07/...-installation/
maybe this will help:
http://en.wikipedia.org/wiki/Blow-off_valve
http://www.carblog.co.za/2006/09/07/...-installation/
06-07-08, 03:37 PM
#40
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girls... girls
maybe this will help:
http://en.wikipedia.org/wiki/Blow-off_valve
http://www.carblog.co.za/2006/09/07/...-installation/
maybe this will help:
http://en.wikipedia.org/wiki/Blow-off_valve
http://www.carblog.co.za/2006/09/07/...-installation/
I encourage either of you to send garrett an email and become enlightened. Hell go read ANY of their FAQ's, when they discuss compressor surge they ONLY mention the damage it will do to turbos with thrust bearing center sections. Please, go question one of the leading turbo designers in the world and see how far you get with them...
Last edited by JHew84; 06-07-08 at 03:42 PM.
06-08-08, 06:38 AM
#42
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Ran my Integra GSR turbo without a BOV for a long time. Same with my TO4-R FD3S.
Do 18wheelers even run them?
This could very quickly turn into the "turbo timer" thread. Pure comedy.
Do 18wheelers even run them?
This could very quickly turn into the "turbo timer" thread. Pure comedy.
06-08-08, 11:20 AM
#43
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Diesels are different, they don't use a throttle body so the positive pressure is bled off through the exhaust. It is the same with post TB turbo setups as well (the delereon had a couple available for it I just found out the other day).
My truck does not have a BOV, the turbo just winds down with the RPM's, sounds really cool
.
It's cool, I'm not so much arguing but I think it would be a shame if someone looking for a real answer came across this thread in the future and all he had to go from was misinformation. If you find a definitive answer from a credible source be sure to post it! although if testimonies from many people who seem to have done it already and the fact that garrett supports it isn't enough I'm not sure what will be.
My truck does not have a BOV, the turbo just winds down with the RPM's, sounds really cool
.It's cool, I'm not so much arguing but I think it would be a shame if someone looking for a real answer came across this thread in the future and all he had to go from was misinformation. If you find a definitive answer from a credible source be sure to post it! although if testimonies from many people who seem to have done it already and the fact that garrett supports it isn't enough I'm not sure what will be.
06-08-08, 07:32 PM
#44
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Can I ask a genuine question, all arguements aside and all side effects aside
If I was bored of the stock coughing sound the factory bov makes, and I wanted a little compressor surge sound, do I simply block off the factory BOV and block up the hole in the airbox? and I will get some noise?
Thank you !
If I was bored of the stock coughing sound the factory bov makes, and I wanted a little compressor surge sound, do I simply block off the factory BOV and block up the hole in the airbox? and I will get some noise?
Thank you !
06-09-08, 06:45 AM
#46
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06-09-08, 08:22 AM
#47
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https://www.rx7club.com/3rd-generation-specific-1993-2002-16/vacuum-diagrams-stock-simplified-sequential-non-sequential-single-turbo-749702/#post8113663
There's a link to one of the posts in the FAQ, it has vacuum diagrams from completely stock, to very simplified single setup. You'll probably just want to take a look at the first one and trace the vacuum lines from the DV's.
There's a link to one of the posts in the FAQ, it has vacuum diagrams from completely stock, to very simplified single setup. You'll probably just want to take a look at the first one and trace the vacuum lines from the DV's.
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