bov,divertor valves,and bypass valves..open bov supercharger guys come inside..

turbot4 · November 21st, 2009, 08:53 AM

ok , any help on what is the differance....
now i am running the stock plastic vortech bosch valve, i'm running it open, but i seen it states the valve is only good for 10psi and 375hp...
my question is i'm hitting nearly 12 on my boost gauge at redline, but could this claim that vortech is making be robbing me power?...as stated the valve says 375 hp, i'm making nearly 415whp...
i wanted to switch to a regular bov, but i did'nt want to mess anything up...andbody running a supercharged car with an open valve, please state the make and model of the valve you are using....and how it is hooked up, ect....
i'm thinking of switching over to a different valve, but i want to see what people are using...
i tried a regular dsm valve, but it was acting up...i dropped it and broke the nipple off it, put it back together and was going crazy on the dyno, so i had to put the bosch on...
so mainly my question is will a regular turbo bov work yes or no i need some input...
thanks..

turbot4 · November 21st, 2009, 09:52 PM

anybody?

weems · November 21st, 2009, 11:14 PM

Yes a regular turbo BOV will work, but you have to make sure you have a spring rated for enough boost.

turbot4 · November 22nd, 2009, 07:24 AM

ok, all i needed to know...a stock dsm/300gt bov will hold upto 14psi...i think mine may be leaking...due to what vortech is saying...
i think when i broke the vacuum nipple off and re-attached it, somethingn got messed up , thats why it was going crazy on the dyno...

i have seen mixed opinions on this though......
so i need a few SC guys to chime in if they are running a bov like titl,hks,greedy,turboxs ect...

B0B · November 22nd, 2009, 12:04 PM

i won't ever use a blowoff valve on a supercharged car again. your best bet is a bypass valve vented to the atmosphere. i'd go with a procharger big red bypass. they're spendy but very nice. or you can do two stock bypass valves. i had a Greddy Types s on mine and it fluttered so bad it sounded like there was a peacock under my hood when cruising at partial throttle, and it messed up my A/F ratio

weems · November 22nd, 2009, 12:22 PM

Originally Posted by B0B

i won't ever use a blowoff valve on a supercharged car again. your best bet is a bypass valve vented to the atmosphere. i'd go with a procharger big red bypass. they're spendy but very nice. or you can do two stock bypass valves. i had a Greddy Types s on mine and it fluttered so bad it sounded like there was a peacock under my hood when cruising at partial throttle, and it messed up my A/F ratio

This made me lol!

turbot4 · November 23rd, 2009, 07:27 AM

i'm looking at the 2, and i can't see a differance...the tial and procharger look identical , but one is for turbo applications and the other for supercharger apps....
i half to get ahold of a good 2g dsm bov the inlet and outlet are twice the stock bosch valve, but i was worried it would not work the same, yet they appear to be....

turbot4 · November 25th, 2009, 06:30 AM

are the forums dying or what ....i can't get any help..and this thread has ben up for about a week now..

dcook_14 · November 25th, 2009, 10:31 AM

yeah the forums haven't been that active lately. Sucks cause now I get really bored at work haha.

Anyway, I have a procharger big red vented and love it. I still have to get it dialed in because I think it's not closing fully at WOT and leaking off boost, but who knows. Look into the procharger big red. I wouldn't do the open valve if you DD the car, cause you could easily have something get into the piping and go into your motor. The other big red has a little outlet on it so you can put a filter on it or cover it somehow. Either that or get the vortech mini-race vavle

weems · November 25th, 2009, 10:48 AM

I can't be much help, I am running a draw through MAF. But I have heard great things about the mini race.

03_StangGuy · November 25th, 2009, 11:08 AM

Originally Posted by B0B

i won't ever use a blowoff valve on a supercharged car again. your best bet is a bypass valve vented to the atmosphere. i'd go with a procharger big red bypass. they're spendy but very nice. or you can do two stock bypass valves. i had a Greddy Types s on mine and it fluttered so bad it sounded like there was a peacock under my hood when cruising at partial throttle, and it messed up my A/F ratio

Why didnt you like at BOV? Dont a BOV and By-pass work the same when venting to the atmosphere?

turbot4 · November 25th, 2009, 03:23 PM

that's what i want to know.....

B0B · November 25th, 2009, 03:59 PM

bov's and bypass valves are made differently. a bypass has a much softer spring than a BOV. the bov uses the spring to stay shut, the bypass uses the spring too but mainly uses boost pressure to stay shut. a bypass valve will stay wide open under partial throttle and close only when you give it a lot of gas creating close to zero vaccuum. a BOV will close under partial throttle (think about it, they're made for turbos which don't create boost when cruising at partial throttle, they require an engine load to spool. a centri blower is belt driven so it will be spooling and creating potential boost at any given rpm unlike a turbo) therefore causing it to flutter while cruising. not only is it annoying, but it will mess with your air/fuel ratio because the air will surge through your intercooler piping when the valve flutters, and it will make your a/f ratio spike up and down.

i hope this makes sense, lol i can understand it in my head but its hard to explain if you haven't experienced using both valves.

03_StangGuy · November 25th, 2009, 04:32 PM

While that is tru you can use a BOV with a mild spring as a By-pass. Thats what I do. It open venting air at part throttle, the vaccume pressure keeps it open and when i drop to about 16in of vac it closes fully.

Scott2001GT · November 25th, 2009, 05:04 PM

I got a BigRed Race vavle with my P1sc kit. I have researched it and every says its a great bypass. AND LOUD!

ajm · November 25th, 2009, 06:15 PM

Originally Posted by weems

I can't be much help, I am running a draw through MAF. But I have heard great things about the mini race.

Prolly not much help to you but I agree with weems. I love mine.

turbot4 · November 25th, 2009, 07:58 PM

the bigred race valve and the tial bov look very similar.....i just can't see spending that kind of money for a bov.....my boost does not blled off up top, so i doubt i am leaking, and i'm making much more hp than vortech says on a stock bosch....i dunno ...i doubt anything would change if i dropped 300 bucks on a valve, other than maybe it will be a bit louder...

Scott2001GT · November 25th, 2009, 08:03 PM

The race valve is a lot louder

dcook_14 · November 25th, 2009, 10:09 PM

Well if you're making a lot of hp that usually means you're using a lot of boost and you should proably have a BOV/BPV that has the correct springs to handle your application. I could also see a potential problem if the outlet on the BOV/BPV is too small if you're running a lot of boost. If it's not able to vent off all the air when you want it to then you're going to have a flutter when too much air is coming through the system, much like when you're running a BOV and it's trying to close at part throttle. Either way it just means that too much air is coming in when it's supposed to be venting off.

A good BOV/BPV is pretty crucial to a good turbo or sc setup. Think about it. If you have a shitty valve you're either going to be bleeding off a bunch of boost when you don't want to (losing hp) or you're going to be forcing in a lot of air that the engine doesn't want (risking detonation and engine failure).

turbot4 · November 26th, 2009, 02:20 AM

i'm working on it....more than likely gong to go with the big race, since it will easilly work with my setup without me changing anything..

November 21st, 2009, 08:53 AM	#1
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	bov,divertor valves,and bypass valves..open bov supercharger guys come inside.. ok , any help on what is the differance.... now i am running the stock plastic vortech bosch valve, i'm running it open, but i seen it states the valve is only good for 10psi and 375hp... my question is i'm hitting nearly 12 on my boost gauge at redline, but could this claim that vortech is making be robbing me power?...as stated the valve says 375 hp, i'm making nearly 415whp... i wanted to switch to a regular bov, but i did'nt want to mess anything up...andbody running a supercharged car with an open valve, please state the make and model of the valve you are using....and how it is hooked up, ect.... i'm thinking of switching over to a different valve, but i want to see what people are using... i tried a regular dsm valve, but it was acting up...i dropped it and broke the nipple off it, put it back together and was going crazy on the dyno, so i had to put the bosch on... so mainly my question is will a regular turbo bov work yes or no i need some input... thanks.. __________________

November 21st, 2009, 09:52 PM	#2
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	anybody? __________________

November 22nd, 2009, 07:24 AM	#4
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	ok, all i needed to know...a stock dsm/300gt bov will hold upto 14psi...i think mine may be leaking...due to what vortech is saying... i think when i broke the vacuum nipple off and re-attached it, somethingn got messed up , thats why it was going crazy on the dyno... i have seen mixed opinions on this though...... so i need a few SC guys to chime in if they are running a bov like titl,hks,greedy,turboxs ect... __________________

November 22nd, 2009, 12:04 PM	#5
B0B Boost gets you laid 2001 Mustang GT 12.93@113.7 (on the 18's) Join Date: Dec 2006 Location: Milton, WA Posts: 2,609 iTrader: 2 reviews	i won't ever use a blowoff valve on a supercharged car again. your best bet is a bypass valve vented to the atmosphere. i'd go with a procharger big red bypass. they're spendy but very nice. or you can do two stock bypass valves. i had a Greddy Types s on mine and it fluttered so bad it sounded like there was a peacock under my hood when cruising at partial throttle, and it messed up my A/F ratio __________________ '01 GT. Just a couple Bolt-ons. 0rwhp 0rwtq. Epic Turbo build in progress 2003 Rubicon (wheelin rig) 2008 Silverado 4x4 (towin rig/road queen) 2009 KTM 450 XC-W (Brap Brap!)

November 23rd, 2009, 07:27 AM	#7
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	i'm looking at the 2, and i can't see a differance...the tial and procharger look identical , but one is for turbo applications and the other for supercharger apps.... i half to get ahold of a good 2g dsm bov the inlet and outlet are twice the stock bosch valve, but i was worried it would not work the same, yet they appear to be.... __________________

November 21st, 2009, 11:14 PM	#3
weems Tech Exchange Head Honcho 2003 SVT Cobra 11.70 @ 121 Join Date: Aug 2006 Location: Forsyth/Statesboro, GA Posts: 9,176 iTrader: 3 reviews	Yes a regular turbo BOV will work, but you have to make sure you have a spring rated for enough boost.

November 25th, 2009, 06:30 AM	#8
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	are the forums dying or what ....i can't get any help..and this thread has ben up for about a week now.. __________________

November 25th, 2009, 10:31 AM	#9
dcook_14 Banned 2004 Mustang GT 12.35@114.08 w/ 1.88 60' Join Date: Feb 2009 Location: Waterloo, IA Posts: 7,015 Blog Entries: 2 iTrader: 7 reviews	yeah the forums haven't been that active lately. Sucks cause now I get really bored at work haha. Anyway, I have a procharger big red vented and love it. I still have to get it dialed in because I think it's not closing fully at WOT and leaking off boost, but who knows. Look into the procharger big red. I wouldn't do the open valve if you DD the car, cause you could easily have something get into the piping and go into your motor. The other big red has a little outlet on it so you can put a filter on it or cover it somehow. Either that or get the vortech mini-race vavle __________________ Do the Right Thing, Cook. ~Zip.

November 25th, 2009, 10:48 AM	#10
weems Tech Exchange Head Honcho 2003 SVT Cobra 11.70 @ 121 Join Date: Aug 2006 Location: Forsyth/Statesboro, GA Posts: 9,176 iTrader: 3 reviews	I can't be much help, I am running a draw through MAF. But I have heard great things about the mini race.

November 25th, 2009, 03:23 PM	#12
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	that's what i want to know..... __________________

November 25th, 2009, 03:59 PM	#13
B0B Boost gets you laid 2001 Mustang GT 12.93@113.7 (on the 18's) Join Date: Dec 2006 Location: Milton, WA Posts: 2,609 iTrader: 2 reviews	bov's and bypass valves are made differently. a bypass has a much softer spring than a BOV. the bov uses the spring to stay shut, the bypass uses the spring too but mainly uses boost pressure to stay shut. a bypass valve will stay wide open under partial throttle and close only when you give it a lot of gas creating close to zero vaccuum. a BOV will close under partial throttle (think about it, they're made for turbos which don't create boost when cruising at partial throttle, they require an engine load to spool. a centri blower is belt driven so it will be spooling and creating potential boost at any given rpm unlike a turbo) therefore causing it to flutter while cruising. not only is it annoying, but it will mess with your air/fuel ratio because the air will surge through your intercooler piping when the valve flutters, and it will make your a/f ratio spike up and down. i hope this makes sense, lol i can understand it in my head but its hard to explain if you haven't experienced using both valves. __________________ '01 GT. Just a couple Bolt-ons. 0rwhp 0rwtq. Epic Turbo build in progress 2003 Rubicon (wheelin rig) 2008 Silverado 4x4 (towin rig/road queen) 2009 KTM 450 XC-W (Brap Brap!)

November 25th, 2009, 04:32 PM	#14
03_StangGuy I Poop Entirely Way Too Much Blown 03 GT Join Date: Jun 2007 Location: Long Island NY Posts: 6,917 iTrader: 0 reviews	While that is tru you can use a BOV with a mild spring as a By-pass. Thats what I do. It open venting air at part throttle, the vaccume pressure keeps it open and when i drop to about 16in of vac it closes fully. __________________

November 25th, 2009, 05:04 PM	#15
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,793 Blog Entries: 1 iTrader: 3 reviews	I got a BigRed Race vavle with my P1sc kit. I have researched it and every says its a great bypass. AND LOUD! __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone

November 25th, 2009, 07:58 PM	#17
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	the bigred race valve and the tial bov look very similar.....i just can't see spending that kind of money for a bov.....my boost does not blled off up top, so i doubt i am leaking, and i'm making much more hp than vortech says on a stock bosch....i dunno ...i doubt anything would change if i dropped 300 bucks on a valve, other than maybe it will be a bit louder... __________________ Last edited by turbot4; November 25th, 2009 at 08:09 PM.

November 25th, 2009, 08:03 PM	#18
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,793 Blog Entries: 1 iTrader: 3 reviews	The race valve is a lot louder __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

November 25th, 2009, 10:09 PM	#19
dcook_14 Banned 2004 Mustang GT 12.35@114.08 w/ 1.88 60' Join Date: Feb 2009 Location: Waterloo, IA Posts: 7,015 Blog Entries: 2 iTrader: 7 reviews	Well if you're making a lot of hp that usually means you're using a lot of boost and you should proably have a BOV/BPV that has the correct springs to handle your application. I could also see a potential problem if the outlet on the BOV/BPV is too small if you're running a lot of boost. If it's not able to vent off all the air when you want it to then you're going to have a flutter when too much air is coming through the system, much like when you're running a BOV and it's trying to close at part throttle. Either way it just means that too much air is coming in when it's supposed to be venting off. A good BOV/BPV is pretty crucial to a good turbo or sc setup. Think about it. If you have a shitty valve you're either going to be bleeding off a bunch of boost when you don't want to (losing hp) or you're going to be forcing in a lot of air that the engine doesn't want (risking detonation and engine failure). __________________ Do the Right Thing, Cook. ~Zip.

November 26th, 2009, 02:20 AM	#20
turbot4 Hardcore Enthusiast R.I.P. twin screwed!! Join Date: Jan 2009 Location: lebanon pa Posts: 2,377 iTrader: 9 reviews	i'm working on it....more than likely gong to go with the big race, since it will easilly work with my setup without me changing anything.. __________________

Threads Similar to: bov,divertor valves,and bypass valves..open bov supercharger guys come inside..
Thread	Thread Starter	Forum	Replies	Last Post
BOV or Bypass ???	SilverGT04	99-04	8	August 16th, 2009 11:05 PM
anybody running a supercharger and a open bov?	turbot4	99-04	11	May 1st, 2009 05:06 PM
Supercharger Bov	sn94	5.0 Mustangs	1	September 9th, 2008 12:03 AM
BOV?	carlos	99-04	8	July 18th, 2008 03:45 PM
BOV vs BYPASS PERFORMANCE	bransdaman78	General Tech	10	May 9th, 2007 05:14 PM

All times are GMT -4. The time now is 01:22 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.