quiet ass blow off valve

polarexpress17 · May 23rd, 2009, 05:30 PM

it kinda bugs me how quiet my blow off valve is. I dont know if its cause i'm only running 8 psi but you cant even hear it when you let off the throttle. does anybody know why and/or how to get it louder?

kinda a rice question but i love the sound and would like to hear it, Also its a Greddy RS knockoff

siknin · May 23rd, 2009, 06:28 PM

Its the bov man.... i am on 5psi and mine is loud. Your 8psi is plenty to make a bov loud. One of my friends had a greddy knockoff and his was quiet, he was running 10psi

johnmx3ze · May 23rd, 2009, 08:16 PM

those the bov even open?

1fastsilverGT · May 23rd, 2009, 08:44 PM

holy crap polar, last i checked you were only running like 5-6psi now your at 8-10psi, what are you using to tune now? im still pulling a steady 6psi, but im using a 1st gen DSM blow off valve, cheap and quite loud.

polarexpress17 · May 23rd, 2009, 09:28 PM

ive been through 3 different BOVs, stock DSM, HKS knockoff, and now ebay knockoff. i think they are opening but its hard to say, i know i do get alot of compressor surge...

i dont really know where i'd hook it up at then because its right on the port near the throttlebody on the manifold.

as far as tuning, im not using anything at the moment, trying to work out a deal on MS

reallyniceguy · May 24th, 2009, 03:53 AM

If you get compressor surge, it may mean you dont have the right turbo.

Mine would surge when I had my ebay hks type bov with a smaller turbo. I got an ar .50 cold side and ar .63 back side and itsd LOUD.

Also the Greddy type S bov will be very silent. I have both for when I want to be stealthy, or when i want to be loud I slap on the hks type.

polarexpress17 · May 24th, 2009, 07:35 AM

i have the same exact turbo, .63 hot .50 cold. like i said ive been through a 1st gen DSM BOV, HKS knockoff (monza), and now this RS style and none of them are loud at all

johnmx3ze · May 24th, 2009, 07:47 AM

ok i have a type S greddy knokoff but it did not open so i opened it up and took out the smaller spring and left the bigger spring in there and now it opens... its not crazy loud but im only at 3.63 psi right now...

i would open the bov and see if you have 2 springs if you do take one out and try that...

polarexpress17 · May 24th, 2009, 08:51 AM

i will, thank you!

stysinjimmy · May 24th, 2009, 09:09 AM

what kind of hks bov do you use i want mine to be loud and how loud are we talkin here too like it hisses so loud you can hear it like three blocks away or like just enough the guy across th street can hear it

matt_93_GT · May 24th, 2009, 11:01 AM

I had the turboXS RFL on my first gen and it was loud as hell

polarexpress17 · May 24th, 2009, 12:12 PM

yeah thats what the RFL is for

i want it to be decently loud, i dont know about blasting ear drums 5 miles away but i want it to sound loud enough to know whats up, like an SRT-4

I had an HKS SSQV knockoff

artsvetkov · May 24th, 2009, 12:45 PM

Its the spring, my friend is running t3/t4 and he got ebay dual horns BOV and his compressor surged right away, he took it apart, wiped off the sticky grease inside and changed for a softer spring, now it works amazing.

polarexpress17 · May 24th, 2009, 12:50 PM

i just took it apart and it only has one spring, its pretty thin too but i guess that doesnt matter, do you know what spring he used?

artsvetkov · May 24th, 2009, 12:54 PM

he pulled one off his turbo XS type s BOV, but you can go to a hardware store and pick a weaker spring, put it in the parking lot, drive it, if it still too strong, go back and trade it.

siknin · May 24th, 2009, 02:57 PM

my ssqv is plenty loud

http://videos.streetfire.net/video/T...lze_158132.htm

polarexpress17 · May 24th, 2009, 03:37 PM

i dont know, i really dont think it can be the BOV i mean all 3 of them give the same issue. its kinda BS to be honest lol.

siknin · May 24th, 2009, 03:39 PM

are they gettin a strong enuff vacuum source?

polarexpress17 · May 24th, 2009, 03:59 PM

the hose is coming off a nipple right after the throttlebody. so i'd imagine so

artsvetkov · May 24th, 2009, 06:00 PM

I bet its a spring issue.

polarexpress17 · May 24th, 2009, 07:25 PM

its possible, but even the stock 1G DSM one didnt make a sound, my HKS knockoff was super quiet too.

siknin · May 24th, 2009, 07:45 PM

Thats crazy.... were your bovs new?

polarexpress17 · May 24th, 2009, 08:27 PM

nope. but this bov was on my friend's boosted legacy and was loud as shit on there, he got a tial BOV and gave me this one...

its so retarted, even when you boost it makes no sound all you hear is compressor surge or a big vaccum leak sound

artsvetkov · May 24th, 2009, 08:32 PM

in that case try to relocate the vac source and check the line for leaks.

95pse-n2o · May 24th, 2009, 08:32 PM

Quote:

Originally Posted by polarexpress17

ive been through 3 different BOVs, stock DSM, HKS knockoff, and now ebay knockoff. i think they are opening but its hard to say, i know i do get alot of compressor surge...

i dont really know where i'd hook it up at then because its right on the port near the throttlebody on the manifold.

as far as tuning, im not using anything at the moment, trying to work out a deal on MS

If you're getting compressor surge, then the blowoff valve isn't opening enough, or even opening at all. The BOV you have will make plenty of noise if working right, trust me. Even at 6PSI my knockoff sounded almost as loud as my authentic RS on 8PSI (Different car and motor, but same concept)

I think you should start by loosening the adjustsment screw all the way till it barely holds on, and then boost the car. If it doesn't sound loud then, then you have a different issue, or the spring is shot.

But most of the time if the spring is shot, it will blowoff all the time, not cease to blowoff at all. Plus if you've had the same issue with 4 blowoffs now, I'd doubt it's the reason for the issue, as you've been saying.

Try a different vacuum source if all else fails.

May 23rd, 2009, 05:30 PM	#1
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	quiet ass blow off valve it kinda bugs me how quiet my blow off valve is. I dont know if its cause i'm only running 8 psi but you cant even hear it when you let off the throttle. does anybody know why and/or how to get it louder? kinda a rice question but i love the sound and would like to hear it, Also its a Greddy RS knockoff __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 23rd, 2009, 06:28 PM	#2
siknin Donating Member Join Date: Jan 2004 Location: Virginia Age: 28 Posts: 1,775 iTrader: (0)	Its the bov man.... i am on 5psi and mine is loud. Your 8psi is plenty to make a bov loud. One of my friends had a greddy knockoff and his was quiet, he was running 10psi __________________ 94 probe ze turbo

May 23rd, 2009, 08:44 PM	#4
1fastsilverGT Member Join Date: Aug 2004 Location: Lewistown, PA Age: 23 Posts: 380 iTrader: (4)	holy crap polar, last i checked you were only running like 5-6psi now your at 8-10psi, what are you using to tune now? im still pulling a steady 6psi, but im using a 1st gen DSM blow off valve, cheap and quite loud. __________________ 2002 Chevy Camaro Z28, t-56, poly mounts, SLP I/E, HKER LT's, motive 4.10's, mac rear girdle, 100shot..... 340hp 352ft.lbs on motor, 12.65@118mph 1996 Probe GT 5spd, t3/t4 60-1 @ 8psi. FMIC, STS, side exit exhaust, ACT 6puck, finally Squirted! DDFTW! 2007 Suzuki DRZ400SUMO, all blacked out---WHEELIE MACHINE!

May 23rd, 2009, 09:28 PM	#5
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	ive been through 3 different BOVs, stock DSM, HKS knockoff, and now ebay knockoff. i think they are opening but its hard to say, i know i do get alot of compressor surge... i dont really know where i'd hook it up at then because its right on the port near the throttlebody on the manifold. as far as tuning, im not using anything at the moment, trying to work out a deal on MS __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie. Last edited by polarexpress17 : May 23rd, 2009 at 09:28 PM. Reason: Automerged Doublepost

May 24th, 2009, 03:53 AM	#6
reallyniceguy Turbo Member Join Date: Mar 2005 Age: 28 Posts: 1,858 iTrader: (4)	If you get compressor surge, it may mean you dont have the right turbo. Mine would surge when I had my ebay hks type bov with a smaller turbo. I got an ar .50 cold side and ar .63 back side and itsd LOUD. Also the Greddy type S bov will be very silent. I have both for when I want to be stealthy, or when i want to be loud I slap on the hks type. __________________ KLZE TURBO 5 psi untunned and all bolt ons.

May 23rd, 2009, 08:16 PM	#3
johnmx3ze Member Join Date: Nov 2008 Location: hawkesbury Posts: 301 iTrader: (0)	those the bov even open?

May 24th, 2009, 07:35 AM	#7
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	i have the same exact turbo, .63 hot .50 cold. like i said ive been through a 1st gen DSM BOV, HKS knockoff (monza), and now this RS style and none of them are loud at all __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 07:47 AM	#8
johnmx3ze Member Join Date: Nov 2008 Location: hawkesbury Posts: 301 iTrader: (0)	ok i have a type S greddy knokoff but it did not open so i opened it up and took out the smaller spring and left the bigger spring in there and now it opens... its not crazy loud but im only at 3.63 psi right now... i would open the bov and see if you have 2 springs if you do take one out and try that...

May 24th, 2009, 08:51 AM	#9
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	i will, thank you! __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 09:09 AM	#10
stysinjimmy Donating User Join Date: Jan 2009 Location: Havelock, NC Age: 25 Posts: 459 iTrader: (1)	what kind of hks bov do you use i want mine to be loud and how loud are we talkin here too like it hisses so loud you can hear it like three blocks away or like just enough the guy across th street can hear it __________________ http://www.cardomain.com/ride/2361618

May 24th, 2009, 11:01 AM	#11
matt_93_GT Donating Member Join Date: Oct 2002 Location: Portland,Oregon Posts: 2,275 iTrader: (2)	I had the turboXS RFL on my first gen and it was loud as hell __________________ R.I.P. Roy W Clark You will be missed. 06 subaru Impreza 2.5i siting on cobs "Sir, you got crack paraphenalia in your spagetti noodles" myspace.com/thebigsmarty Originally Posted by 04.SPT.WRX ... ride cushioned by a load of poo ...

May 24th, 2009, 12:12 PM	#12
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	yeah thats what the RFL is for i want it to be decently loud, i dont know about blasting ear drums 5 miles away but i want it to sound loud enough to know whats up, like an SRT-4 I had an HKS SSQV knockoff __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 12:45 PM	#13
artsvetkov Turbo Member Join Date: Sep 2007 Location: Seattle area, WA Posts: 1,992 iTrader: (5)	Its the spring, my friend is running t3/t4 and he got ebay dual horns BOV and his compressor surged right away, he took it apart, wiped off the sticky grease inside and changed for a softer spring, now it works amazing. __________________ 93 PGT Kitted and all -sold, Current 93 PGT-ZE-T So far: 12" brakes, ZE, T3/T4 turbo, 2.5" exhaust , Stage II Clutch, MSD6AL+2step, Coilovers, 245/45/17x9 cobra r, 67mm TB, MS II, traction bars and more. THE OBJECTS IN THE MIRROR ARE LOSING

May 24th, 2009, 12:50 PM	#14
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	i just took it apart and it only has one spring, its pretty thin too but i guess that doesnt matter, do you know what spring he used? __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 12:54 PM	#15
artsvetkov Turbo Member Join Date: Sep 2007 Location: Seattle area, WA Posts: 1,992 iTrader: (5)	he pulled one off his turbo XS type s BOV, but you can go to a hardware store and pick a weaker spring, put it in the parking lot, drive it, if it still too strong, go back and trade it. __________________ 93 PGT Kitted and all -sold, Current 93 PGT-ZE-T So far: 12" brakes, ZE, T3/T4 turbo, 2.5" exhaust , Stage II Clutch, MSD6AL+2step, Coilovers, 245/45/17x9 cobra r, 67mm TB, MS II, traction bars and more. THE OBJECTS IN THE MIRROR ARE LOSING

May 24th, 2009, 02:57 PM	#16
siknin Donating Member Join Date: Jan 2004 Location: Virginia Age: 28 Posts: 1,775 iTrader: (0)	my ssqv is plenty loud http://videos.streetfire.net/video/T...lze_158132.htm __________________ 94 probe ze turbo

May 24th, 2009, 03:37 PM	#17
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	i dont know, i really dont think it can be the BOV i mean all 3 of them give the same issue. its kinda BS to be honest lol. __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 03:39 PM	#18
siknin Donating Member Join Date: Jan 2004 Location: Virginia Age: 28 Posts: 1,775 iTrader: (0)	are they gettin a strong enuff vacuum source? __________________ 94 probe ze turbo

May 24th, 2009, 03:59 PM	#19
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	the hose is coming off a nipple right after the throttlebody. so i'd imagine so __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 06:00 PM	#20
artsvetkov Turbo Member Join Date: Sep 2007 Location: Seattle area, WA Posts: 1,992 iTrader: (5)	I bet its a spring issue. __________________ 93 PGT Kitted and all -sold, Current 93 PGT-ZE-T So far: 12" brakes, ZE, T3/T4 turbo, 2.5" exhaust , Stage II Clutch, MSD6AL+2step, Coilovers, 245/45/17x9 cobra r, 67mm TB, MS II, traction bars and more. THE OBJECTS IN THE MIRROR ARE LOSING

May 24th, 2009, 07:25 PM	#21
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	its possible, but even the stock 1G DSM one didnt make a sound, my HKS knockoff was super quiet too. __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 07:45 PM	#22
siknin Donating Member Join Date: Jan 2004 Location: Virginia Age: 28 Posts: 1,775 iTrader: (0)	Thats crazy.... were your bovs new? __________________ 94 probe ze turbo

May 24th, 2009, 08:27 PM	#23
polarexpress17 I like emoticons :) Join Date: Oct 2005 Location: Trevorton, PA Age: 19 Posts: 5,987 iTrader: (37)	nope. but this bov was on my friend's boosted legacy and was loud as shit on there, he got a tial BOV and gave me this one... its so retarted, even when you boost it makes no sound all you hear is compressor surge or a big vaccum leak sound __________________ '93 MX6 - what rod bearings? ~NEPO~ my car hates me Built, Not Bought. No, my username is NOT from that stupid movie.

May 24th, 2009, 08:32 PM	#24
artsvetkov Turbo Member Join Date: Sep 2007 Location: Seattle area, WA Posts: 1,992 iTrader: (5)	in that case try to relocate the vac source and check the line for leaks. __________________ 93 PGT Kitted and all -sold, Current 93 PGT-ZE-T So far: 12" brakes, ZE, T3/T4 turbo, 2.5" exhaust , Stage II Clutch, MSD6AL+2step, Coilovers, 245/45/17x9 cobra r, 67mm TB, MS II, traction bars and more. THE OBJECTS IN THE MIRROR ARE LOSING