JDMCITY.COM
Advertise with us!

Go Back   JDMCITY.COM > Technical Forum > Forced Induction & Nitrous

Reply
 
Old 08/21/2013, 10:44 AM   #1
TheMaster
JDM Soldier
 
TheMaster's Avatar
 
TheMaster is offline
Join Date: May 2013
Location: Okinawa, Japan
Posts: 268

 
Default BOV are just a flashy noise?

In the past 2 years it's come to my attention that maybe BOV aren't the "turbo life saver" like we all have come to believe. I've noticed many high end race cars with turbos tend to not run a BOV and recently this has started to become a more common thing with drift cars in order to improve throttle response and reduce lag. Then today I stumbled across this article, which I must say was a pretty interesting read. Thus I feel I shall share with you all.

http://www.motoiq.com/MagazineArticl...accusumps.aspx

Opinions?

  Reply With Quote
Old 08/21/2013, 12:27 PM   #2
ConHuevos!
MEXICAN
 
ConHuevos!'s Avatar
 
ConHuevos! is offline
Join Date: Jul 2006
Location: DSM
Posts: 1,838

 
Default Re: BOV are just a flashy noise?

hmmmm it is interesting. Would I run a turbo car without a bov, no. I would loosely relate it to using a pcv valve. i'm pretty sure it will not hurt your motor in the short term to not have one but in the long run, it will influence something to fail.

anyone on here willing to try running with no bov?


__________________

Desire is like a carousel. Once you have acheived what was desired, you are left back in the same spot you were in before you had the desire.

Sri Sri Ravi Shankar
  Reply With Quote
Old 08/21/2013, 07:49 PM   #3
H22APWRD94
The Tranny Guy
 
H22APWRD94 is offline
Join Date: May 2007
Posts: 2,007

 
Default Re: BOV are just a flashy noise?

Just had my turbo freshened up. Not willing to try it, even with full throttle shifting.

  Reply With Quote
Old 08/22/2013, 08:41 AM   #4
TheMaster
JDM Soldier
 
TheMaster's Avatar
 
TheMaster is offline
Join Date: May 2013
Location: Okinawa, Japan
Posts: 268

 
Default Re: BOV are just a flashy noise?

I'm very curious about this, especially on a lower boost level setup with a ball bearing turbo.

  Reply With Quote
Old 08/22/2013, 04:32 PM   #5
importsusa
Vinyl Specialist
 
importsusa's Avatar
 
importsusa is offline
Join Date: Sep 2009
Location: South DSM,IA
Posts: 2,868

 
Default Re: BOV are just a flashy noise?

Quote:
Originally Posted by H22APWRD94 View Post
Just had my turbo freshened up. Not willing to try it, even with full throttle shifting.
Don't know if you remember this mike, but it can't be any worst then when Brian welded the wastegate shut on Josh Sorokas car back in the day when hey did the budget build for the SOHC....lol ha ha

I just remember parts off the block being deposited all over army post....lol.

But yeah the article sounds very intriguing........makes you wonder if it is possible to accomplish without sacrificing your money....which is what it comes down to in the end. It would be something to try if you can find everything you need for dirt cheap (like under 500 cheap) then test on a car you aren't attached to.


__________________

come check us out..............
  Reply With Quote
Old 08/28/2013, 08:21 AM   #6
TheMaster
JDM Soldier
 
TheMaster's Avatar
 
TheMaster is offline
Join Date: May 2013
Location: Okinawa, Japan
Posts: 268

 
Default Re: BOV are just a flashy noise?

I think I'm going to give this a go and just pray the whole time. I shall get back to this subject after I've gone without a BOV for a while. If the turbo ends up taking a dump on me shortly after I'll post those results up as well.

  Reply With Quote
Old 09/17/2013, 06:14 PM   #7
Mienke
JDM Soldier
 
Mienke's Avatar
 
Mienke is offline
Join Date: Sep 2011
Location: Marion
Posts: 161

 
Default Re: BOV are just a flashy noise?

http://www.driftworks.com/forum/tech...v-rb20det.html

these guys say they don't use bovs.


__________________

91 teggy- soon to be rebuilt
91 civic hatch- daily driver/ used for my delivery job
  Reply With Quote
Old 09/17/2013, 06:22 PM   #8
Mienke
JDM Soldier
 
Mienke's Avatar
 
Mienke is offline
Join Date: Sep 2011
Location: Marion
Posts: 161

 
Default Re: BOV are just a flashy noise?

this has me curious though


__________________

91 teggy- soon to be rebuilt
91 civic hatch- daily driver/ used for my delivery job
  Reply With Quote
Old 09/18/2013, 04:01 PM   #9
TheMaster
JDM Soldier
 
TheMaster's Avatar
 
TheMaster is offline
Join Date: May 2013
Location: Okinawa, Japan
Posts: 268

 
Default Re: BOV are just a flashy noise?

Since I said I was going to try it I've been running no BOV and everything has been perfectly fine on 15lb's with a stock turbo. I've also put a good amount of abuse on it as well. I think it's been the best decision I've made so far. The improvements of removing it have been far better then I expected.

Increase in throttle response after being off throttle, car doesn't wanna spit and back fire anymore after the bov dumps air, it doesn't die after doing a top of rpm to clutch in, and I've also come to the belief that my old BOV must have been leaking because there's a significant increase in how quickly I build boost now.

So far so good and after doing some thinking about the subject I don't see how it could possibly damage your turbo by not running one. Off throttle you're not building exhaust pressure to build boost so it's not like closing the throttle is going to suddenly cause a crazy build up in pressure, plus with the whole "surge" thing and the turbo spinning backwards, what does spinning backwards hurt? Also you have the argument of unbalanced load of pressure on the shaft, again this one after some thought has turned the other way in my opinion. Pressure on both sides would have more stress and off balance twisting force then anything so there's no way there's some sudden amount of stress the shaft would see that it couldn't handle.

So now I'm sold on the no BOV idea. The more I think about it the more running a BOV starts to sound stupid to me. There's no actual proof I've been able to find that supports running a BOV will in turn save the life of your turbo.

  Reply With Quote
Old 09/19/2013, 04:04 PM   #10
Mienke
JDM Soldier
 
Mienke's Avatar
 
Mienke is offline
Join Date: Sep 2011
Location: Marion
Posts: 161

 
Default Re: BOV are just a flashy noise?

Quote:
Originally Posted by TheMaster View Post
Since I said I was going to try it I've been running no BOV and everything has been perfectly fine on 15lb's with a stock turbo. I've also put a good amount of abuse on it as well. I think it's been the best decision I've made so far. The improvements of removing it have been far better then I expected.

Increase in throttle response after being off throttle, car doesn't wanna spit and back fire anymore after the bov dumps air, it doesn't die after doing a top of rpm to clutch in, and I've also come to the belief that my old BOV must have been leaking because there's a significant increase in how quickly I build boost now.

So far so good and after doing some thinking about the subject I don't see how it could possibly damage your turbo by not running one. Off throttle you're not building exhaust pressure to build boost so it's not like closing the throttle is going to suddenly cause a crazy build up in pressure, plus with the whole "surge" thing and the turbo spinning backwards, what does spinning backwards hurt? Also you have the argument of unbalanced load of pressure on the shaft, again this one after some thought has turned the other way in my opinion. Pressure on both sides would have more stress and off balance twisting force then anything so there's no way there's some sudden amount of stress the shaft would see that it couldn't handle.

So now I'm sold on the no BOV idea. The more I think about it the more running a BOV starts to sound stupid to me. There's no actual proof I've been able to find that supports running a BOV will in turn save the life of your turbo.
good to know. this really interests me though, down the road a bit you should post how its doing so we can see long term effects. be cool to know if its still holding up solid or people were right and it does wear the turbo faster.


__________________

91 teggy- soon to be rebuilt
91 civic hatch- daily driver/ used for my delivery job
  Reply With Quote
Old 09/19/2013, 09:25 PM   #11
KA7_Legend
gt4 coming soon
 
KA7_Legend's Avatar
 
KA7_Legend is offline
Join Date: Jul 2008
Location: your mom'$ vagina
Posts: 1,437

 
Default Re: BOV are just a flashy noise?

What car and set up are you actually running with no bov on?

  Reply With Quote
Old 09/20/2013, 07:23 AM   #12
TheMaster
JDM Soldier
 
TheMaster's Avatar
 
TheMaster is offline
Join Date: May 2013
Location: Okinawa, Japan
Posts: 268

 
Default Re: BOV are just a flashy noise?

Quote:
Originally Posted by KA7_Legend View Post
What car and set up are you actually running with no bov on?
Skyline motor (RB20DET) in an S14 240sx

  Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 02:45 PM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.