how do you cut the stock blowout valve

airbornSTI · 11-05-2004, 03:41 PM

hey, i heard that you could cut the stock blowout valve so that you could get some extra horsepower. is that true, and if it is how could you do it?

Xman · 11-05-2004, 04:08 PM

I don't know what you mean by blowout valve.

airbornSTI · 11-05-2004, 04:17 PM

bov

airbornSTI · 11-05-2004, 04:26 PM

hey, im sorry i mean blow off valves. sorry for the confusion

Xman · 11-05-2004, 05:03 PM

the only mod that i know of for the stock recirculating valve is to crush the cap to increase the spring force. This is not necessary until well over 20psi and on a stock car with stock tuning would do no good, so you were partly correct, but not in a really useful way.

airbornSTI · 11-05-2004, 05:26 PM

xman, do you think that i should just buy a new bov or leave the stock one on. if i get one would it add much horsepower?

ninjaboy76 · 11-06-2004, 02:17 AM

Do some research. The stock blow off valve is what the STi requires. If you replace it you will not gain any power, and you might even end up damaging your car over time. There have been many dicussions on BOVs on this forum.

esemes · 11-06-2004, 05:03 AM

i found the oem bypass valve works better than most other's bov's (even hybrid ones)

airbornSTI · 11-06-2004, 10:40 AM

thanks guys i appreciate the advice.. i will most likely stay with the stock.

googe · 11-06-2004, 10:52 AM

there is no way a bov can give you more power. also our cars dont have a bov, they have a bypass valve, which serves a similar but slightly different purpose. the 2 arent exactly interchangeable (although people switch them anyway)

G-shock · 11-06-2004, 06:23 PM

Quote:

Originally Posted by thedude05

hey, i heard that you could cut the stock blowout valve so that you could get some extra horsepower. is that true, and if it is how could you do it?

Yes, you will need a heavy-duty exactor knife, and then proceed to cut the red doo-hicky going under your IC, and trim back black thingamajig that exits your "blowout" valve...

...I heard its guranteed 20 HP, cause you get no more blowout!

:roll:

...DAMN, WTF is wrong with people!!!!! :x :evil: :x :evil:

WRXTek · 11-06-2004, 07:34 PM

Quote:

Originally Posted by G-shock

Quote:

Originally Posted by thedude05

hey, i heard that you could cut the stock blowout valve so that you could get some extra horsepower. is that true, and if it is how could you do it?

Yes, you will need a heavy-duty exactor knife, and then proceed to cut the red doo-hicky going under your IC, and trim back black thingamajig that exits your "blowout" valve...

...I heard its guranteed 20 HP, cause you get no more blowout!

:roll:

...DAMN, WTF is wrong with people!!!!! :x :evil: :x :evil:

HAHAHAHAHAHAHAHAHAHAHA

sorry not funny

ops:

***Datadatum*** · 11-07-2004, 11:51 AM

thedude - this might help... BOV FAQ

airbornSTI · 11-07-2004, 12:26 PM

thanks datadatum!

Rev · 11-07-2004, 12:50 PM

Quote:

Originally Posted by thedude05

hey, i heard that you could cut the stock blowout valve so that you could get some extra horsepower. is that true, and if it is how could you do it?

Oh. My. Gawd. :roll: :roll: :roll: :roll: :roll: :roll:

11-05-2004, 03:41 PM	#1
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	hey, i heard that you could cut the stock blowout valve so that you could get some extra horsepower. is that true, and if it is how could you do it? This ad is not endorsed by this member. Please register or login to hide this ad.

11-06-2004, 02:17 AM	#7
ninjaboy76 Spec C Club Car: 08 CBR1000RR Fav Mod: None Location: Kansas Posts: 2,452 IWSTI Addict since: Jun 2004 Trader Rating: (6)	Engine internals. Do some research. The stock blow off valve is what the STi requires. If you replace it you will not gain any power, and you might even end up damaging your car over time. There have been many dicussions on BOVs on this forum.

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11-05-2004, 04:08 PM	#2
Xman S204 Racer Car: 2004 STi Fav Mod: Momo fixed back seat, harness bar and Willans 6 point harness Location: Rancho Santa Margarita, C Posts: 2,823 IWSTI Addict since: Apr 2003 Trader Rating: (3)	I don't know what you mean by blowout valve.

11-05-2004, 04:17 PM	#3
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	bov

11-05-2004, 04:26 PM	#4
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	hey, im sorry i mean blow off valves. sorry for the confusion

11-05-2004, 05:03 PM	#5
Xman S204 Racer Car: 2004 STi Fav Mod: Momo fixed back seat, harness bar and Willans 6 point harness Location: Rancho Santa Margarita, C Posts: 2,823 IWSTI Addict since: Apr 2003 Trader Rating: (3)	the only mod that i know of for the stock recirculating valve is to crush the cap to increase the spring force. This is not necessary until well over 20psi and on a stock car with stock tuning would do no good, so you were partly correct, but not in a really useful way.

11-05-2004, 05:26 PM	#6
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	xman, do you think that i should just buy a new bov or leave the stock one on. if i get one would it add much horsepower?

11-06-2004, 05:03 AM	#8
esemes S204 Racer Car: 996TT Location: clearh²o, FL Posts: 4,756 IWSTI Addict since: Jul 2004 Trader Rating: (12)	i found the oem bypass valve works better than most other's bov's (even hybrid ones)

11-06-2004, 10:40 AM	#9
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	thanks guys i appreciate the advice.. i will most likely stay with the stock.

11-06-2004, 10:52 AM	#10
googe Senior STI Driver Posts: 313 IWSTI Addict since: Aug 2003 Trader Rating: (0)	there is no way a bov can give you more power. also our cars dont have a bov, they have a bypass valve, which serves a similar but slightly different purpose. the 2 arent exactly interchangeable (although people switch them anyway)

11-07-2004, 11:51 AM	#13
*Datadatum* 100% More Wingless Car: 05 STi + 08 OBXT Fav Mod: baby seats Location: Jacksonville, FL Posts: 5,891 IWSTI Addict since: May 2004 Trader Rating: (0)	thedude - this might help... BOV FAQ

11-07-2004, 12:26 PM	#14
airbornSTI Senior STI Driver Car: 05 sti Fav Mod: defi gauges Location: san antonio, texas Posts: 341 IWSTI Addict since: Oct 2004 Trader Rating: (0)	thanks datadatum!