BOV'S???? - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

binjoau · 10th July 2008, 01:41 AM

This is just for information purposes and I had a good luck through and couldnt see any posts yet.

So Blow Off Valves, obviously they provide an awesome sound and turn heads but what is there real purpose, I know its to do with relieving excess boost pressure etc but can an expert give there explanation???

Also what is the best type of BOV to go for?? If you have a twin turbo setup do you need 2 BOV's? How hard are they to install yourself?

Sorry if this has been mentioned before but I cant find it!

Alex

EL MAMITO USMC · 10th July 2008, 03:37 AM

Quote:

Originally Posted by binjoau

This is just for information purposes and I had a good luck through and couldnt see any posts yet.

So Blow Off Valves, obviously they provide an awesome sound and turn heads but what is there real purpose, I know its to do with relieving excess boost pressure etc but can an expert give there explanation???
you just answered your question
Also what is the best type of BOV to go for??
its up to you just buy a good one and not a cheap ebay imitaion
If you have a twin turbo setup do you need 2 BOV's? How hard are they to install yourself?
not necesarily but it helps one close to each turbo
Sorry if this has been mentioned before but I cant find it!

Alex

hope this helps

binjoau · 10th July 2008, 04:08 AM

I would never consider buying a cheap inimtation, so when you purhcase a BOV what comes included? Do you get a replacement peice of piping from the turbo or do you have to tap into the original? Cutting etc? Ive seen most people go for the Blitz or HKS model so thats the way Il eventually go.

GT-R Glenn · 10th July 2008, 06:10 AM

What car
What Engine
How much power

binjoau · 10th July 2008, 06:09 PM

Well for me it will be 95 R33 GTR V-spec, exhaust, intake, apexi power fc, this was more of just wondering though, I cant even order my Skyline for 6 months!! I appreciate the info though!

GT-R Glenn · 10th July 2008, 11:28 PM

Why not just leave the standard ones on it that work fine ?

hytech · 11th July 2008, 12:10 AM

I still run the std BOV's, had no issues yet.

Can't see the point in changing them.

binjoau · 11th July 2008, 12:56 AM

I just found a good explanation video on youtube, I wouldnt want a chav style loud one but are the standard ones at least decent?

GT-R Glenn · 11th July 2008, 04:26 AM

Quote:

Why not just leave the standard ones on it that work fine ?

!!!

binjoau · 11th July 2008, 04:37 AM

I was only asking!! It was an upgrade qusetion, im sure the standard ones are good but whats wrong with wanting louder ones! Its like saying the standard GTR wheels are fine so why change them, but most people do.

Cliff J · 11th July 2008, 08:36 AM

I`d leave the standard dump valves in place as they`ll do the job, upgrading to expensive HKS type wont gain you anything except noise, just get a twin induction kit and you`ll get a nice whoosh when you lift off from boost anyhow.

binjoau · 11th July 2008, 05:15 PM

Thanks cliff, il just give that a try first, im counting the days till I can get my R33!! So another question, is there any actual performance gain with aftermarket BOV's? Do they allow faster spool up between shifts or does it not make any difference at stage 1?

Cliff J · 12th July 2008, 10:32 AM

The only thing you`ll do at stage 1 with aftermarket VTA dump valves (ptshhhh type) is lose boost between gear changes as it vents to atmosphere, hence when changing gear you`ll then have to build that boost up again.
Its very minimal at the 400bhp level, but unless you`re running big big boost, it really doesn`t need to be vented.
Trust me on the air filter noise, you wont want a VTA after that.
My filters are HKS and sound great, very loud when lifting off the throttle when on boost

aferx · 12th July 2008, 02:09 PM

I have just received the hks ssq dump valve from newera parts. just like the sound so went and ordered one have spoken to perfect touch and they say its fine. the old hks ssq were twin but new versions are single and top mounted. this dump valve is the best on to go for in my own opinion and comes complete in a kit ready to go. I paid around £370 for it as i said i am only using it because i like the sound

aferx · 12th July 2008, 02:32 PM

Heres some pics of the hks ssq bov have to say thanks to matty at newera for a quick delivery service

10th July 2008, 01:41 AM	#1 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	BOV'S???? This is just for information purposes and I had a good luck through and couldnt see any posts yet. So Blow Off Valves, obviously they provide an awesome sound and turn heads but what is there real purpose, I know its to do with relieving excess boost pressure etc but can an expert give there explanation??? Also what is the best type of BOV to go for?? If you have a twin turbo setup do you need 2 BOV's? How hard are they to install yourself? Sorry if this has been mentioned before but I cant find it! Alex

10th July 2008, 04:08 AM	#3 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	I would never consider buying a cheap inimtation, so when you purhcase a BOV what comes included? Do you get a replacement peice of piping from the turbo or do you have to tap into the original? Cutting etc? Ive seen most people go for the Blitz or HKS model so thats the way Il eventually go. Last edited by binjoau; 10th July 2008 at 04:12 AM.

11th July 2008, 12:56 AM	#8 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	I just found a good explanation video on youtube, I wouldnt want a chav style loud one but are the standard ones at least decent? Last edited by binjoau; 11th July 2008 at 01:12 AM.

11th July 2008, 08:36 AM	#11 (permalink)
Cliff J GTROC Member Join Date: Jan 2008 Location: High Wycombe Posts: 589	I`d leave the standard dump valves in place as they`ll do the job, upgrading to expensive HKS type wont gain you anything except noise, just get a twin induction kit and you`ll get a nice whoosh when you lift off from boost anyhow. __________________ 2008 Pro street drag series - Street class winner!!! R33 GTR - running on a £0 budget!!!! Sponsors wanted for 2009

11th July 2008, 05:15 PM	#12 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	Thanks cliff, il just give that a try first, im counting the days till I can get my R33!! So another question, is there any actual performance gain with aftermarket BOV's? Do they allow faster spool up between shifts or does it not make any difference at stage 1? Last edited by binjoau; 11th July 2008 at 05:29 PM.

10th July 2008, 06:10 AM	#4 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,302	What car What Engine How much power

10th July 2008, 06:09 PM	#5 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	Well for me it will be 95 R33 GTR V-spec, exhaust, intake, apexi power fc, this was more of just wondering though, I cant even order my Skyline for 6 months!! I appreciate the info though!

10th July 2008, 11:28 PM	#6 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,302	Why not just leave the standard ones on it that work fine ?

11th July 2008, 12:10 AM	#7 (permalink)
hytech GTR Register Member Join Date: Feb 2003 Location: Auckland NZ Posts: 117	I still run the std BOV's, had no issues yet. Can't see the point in changing them.

11th July 2008, 04:37 AM	#10 (permalink)
binjoau GTR Register Member Join Date: May 2008 Location: Whistler, Canada Posts: 127	I was only asking!! It was an upgrade qusetion, im sure the standard ones are good but whats wrong with wanting louder ones! Its like saying the standard GTR wheels are fine so why change them, but most people do.

12th July 2008, 10:32 AM	#13 (permalink)
Cliff J GTROC Member Join Date: Jan 2008 Location: High Wycombe Posts: 589	The only thing you`ll do at stage 1 with aftermarket VTA dump valves (ptshhhh type) is lose boost between gear changes as it vents to atmosphere, hence when changing gear you`ll then have to build that boost up again. Its very minimal at the 400bhp level, but unless you`re running big big boost, it really doesn`t need to be vented. Trust me on the air filter noise, you wont want a VTA after that. My filters are HKS and sound great, very loud when lifting off the throttle when on boost __________________ 2008 Pro street drag series - Street class winner!!! R33 GTR - running on a £0 budget!!!! Sponsors wanted for 2009

12th July 2008, 02:09 PM	#14 (permalink)
aferx GTROC Member Join Date: Oct 2005 Location: LONDON Posts: 206	I have just received the hks ssq dump valve from newera parts. just like the sound so went and ordered one have spoken to perfect touch and they say its fine. the old hks ssq were twin but new versions are single and top mounted. this dump valve is the best on to go for in my own opinion and comes complete in a kit ready to go. I paid around £370 for it as i said i am only using it because i like the sound

12th July 2008, 02:32 PM	#15 (permalink)
aferx GTROC Member Join Date: Oct 2005 Location: LONDON Posts: 206	Heres some pics of the hks ssq bov have to say thanks to matty at newera for a quick delivery service

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