STI Blow off valve
09-01-2003 | 05:06 PM
#31
I think I mentioned this, but a recirculating bov will not be very loud, ... that's b/c it is venting into the intake tract.
An atmospheric venting bov is what you'll have to use in order to get the 'sound' you're looking for.
The performance losses from an externally venting bov will probably be small, if any, as I mentioned before. It's going to cause you to run rich, and like I said, that could be useful sometimes (as in, you were in a leaner condition for some reason or another, as in you probably have some sort of engine management causing that condition).
It''ll probably affect your gas mileage too, as in a bit worse.
The only bov I wouldn't recommend that I've had experience with, is the GFB's one (Go Fast Bits). So there's Blitz, TurboXS, HKS, Forge, ......... and I can't think of any others right now, I'm still drunk.
An atmospheric venting bov is what you'll have to use in order to get the 'sound' you're looking for.
The performance losses from an externally venting bov will probably be small, if any, as I mentioned before. It's going to cause you to run rich, and like I said, that could be useful sometimes (as in, you were in a leaner condition for some reason or another, as in you probably have some sort of engine management causing that condition).
It''ll probably affect your gas mileage too, as in a bit worse.
The only bov I wouldn't recommend that I've had experience with, is the GFB's one (Go Fast Bits). So there's Blitz, TurboXS, HKS, Forge, ......... and I can't think of any others right now, I'm still drunk.
09-01-2003 | 05:13 PM
#32
Originally posted by mehlt
bao ling,
I would believe Nolimit's comments and if you still aren't convince start talking to WRX tuners on the mainland (Shiv, etc..) How long has your mechanic friend been working on Subaru's and what are they basing their comments on?
bao ling,
I would believe Nolimit's comments and if you still aren't convince start talking to WRX tuners on the mainland (Shiv, etc..) How long has your mechanic friend been working on Subaru's and what are they basing their comments on?
boa ling, ... just so you know, I'm not a fan of spreading false information. And sorry, but your mechanic friend is wrong. If you don't want to believe me, take mehlt's advice, and contact some of the Top Subaru tuners in the Country.
.... and just b/c you don't notice any performance difference, doesn't mean it's not happening.
Like I said, ...... it's a trade off, it's not going to hurt anything per say, so if you want one, then use it. AND like I said, ........
[lil sis]I got's one on my cahr!!!![/lil sis]
09-01-2003 | 07:31 PM
#34
VIP Member
iTrader: (12)
Joined: Dec 2002
Posts: 1,286
From: 2006 Streetcar Showoff Hot Dog Eating Champion
Car Info: heavy, stock power, slow, perfect
w/o a bov, you might break throttle bodies left and right. remember the signal car about 2 drift events ago? they went through 3-4 tb's. who gives a crap if things are free.
b
nolimit, where is the thing about the GFB bov? i missed it. is it for the regular ones or the stealth one? thanks b
b
nolimit, where is the thing about the GFB bov? i missed it. is it for the regular ones or the stealth one? thanks b
09-01-2003 | 07:41 PM
#35
A couple guys here used the GFB bov, ... Mike was one of them, that thing sucked so bad!!! (i mean it blew too much )
It wasn't the stealth one, so I'm not sure if it's any better. The problem was with it opening all the damn time, if you were at partial throttle, it would blow off when it should be keeping it mouth shut!! (sounds like some people I know!!)
)It wasn't the stealth one, so I'm not sure if it's any better. The problem was with it opening all the damn time, if you were at partial throttle, it would blow off when it should be keeping it mouth shut!! (sounds like some people I know!!
)
09-01-2003 | 07:44 PM
#36
VIP Member
iTrader: (3)
Joined: Nov 2002
Posts: 10,133
From: Lastweek Lane - Watertown, NY
Car Info: 02WRXpseudoSTiWannabeWagon
Originally posted by Nolimit
oh yeah, ... and the reason the stock bov recirculates into the intake tract is b/c the air that it releases is already 'measured' by the ecu, so releasing that air into the atmosphere 'messes' with the ecu's calculations of what fuel, etc, etc should be.
I tried to put that as simple as possibble.
oh yeah, ... and the reason the stock bov recirculates into the intake tract is b/c the air that it releases is already 'measured' by the ecu, so releasing that air into the atmosphere 'messes' with the ecu's calculations of what fuel, etc, etc should be.
I tried to put that as simple as possibble.
In my case, I put a atmo on in order to combat an 'after-shift' leaness, but I don't think that it is doing the trick any longer.
Hard to tell.
Of course, Sean or whoever, correct me if I'm wrong.
09-01-2003 | 07:53 PM
#37
In your case Pat, that would be an example of an "after-shift" lean condition, ... caused by tuning of the UTEC.
I believe the ECU's 'self-learning' to be a never ending cycle (as in it's just going to try and go back and forth to what it 'thinks' it should be, and what it's seeing), .... so it's never going to be able to fully compensate, imo.
OKAY, we've beat the sh*t out of this dead horse!!!!!!!
I believe the ECU's 'self-learning' to be a never ending cycle (as in it's just going to try and go back and forth to what it 'thinks' it should be, and what it's seeing), .... so it's never going to be able to fully compensate, imo.
OKAY, we've beat the sh*t out of this dead horse!!!!!!!
09-03-2003 | 04:40 AM
#39
Registered User
iTrader: (18)
Joined: Nov 2002
Posts: 1,851
From: 12.88@102.27mph w/ 1.5 60ft no tune, no problem!
Car Info: 02 wrx
Originally posted by kscsentragtr
alright well me and my friend are planning to get BOV's for our wrxs... and i would be lying if i said that i didnt care about the "pshhhhh" sound... (alright give it to me flammers)... anyways... my friend and i wanted to buy a BOV that wouldnt mess up our cars (like how nolimit was saying) and that was loud... and i know i asked this before but i never really got a good response... What BOV would everyone recommend? Recirculating or Atmosphere?? Oh and what BOV do you have in your car???
alright well me and my friend are planning to get BOV's for our wrxs... and i would be lying if i said that i didnt care about the "pshhhhh" sound... (alright give it to me flammers)... anyways... my friend and i wanted to buy a BOV that wouldnt mess up our cars (like how nolimit was saying) and that was loud... and i know i asked this before but i never really got a good response... What BOV would everyone recommend? Recirculating or Atmosphere?? Oh and what BOV do you have in your car???
09-03-2003 | 10:23 PM
#40
Guest
Posts: n/a
TAKE OUT YOUR SILENCER AND GET AN INTAKE!
thats what I did and I didn't have to buy a BOV>....plus you can hear the turbo spooling like crazy and you can hear the stock By-pass valve loud and clear....loud enough for me without being too obnoxtious!
i heard lots of negative posts about intakes...but I got a blitz that was designed specifically for the STi ...(according to mach5 when i bought it from him) and have had no problems thus far and am very happy....
thats what I did and I didn't have to buy a BOV>....plus you can hear the turbo spooling like crazy and you can hear the stock By-pass valve loud and clear....loud enough for me without being too obnoxtious!
i heard lots of negative posts about intakes...but I got a blitz that was designed specifically for the STi ...(according to mach5 when i bought it from him) and have had no problems thus far and am very happy....
Last edited by Sti-nkinPhast; 09-03-2003 at 10:25 PM.
09-04-2003 | 03:43 AM
#43
Guest
Posts: n/a
I was thinking about getting that blitz filter. It looks cool and got the 5/5 rating on subarureview.com. But the only thing that bothers me about that is the engine bay on the STI is super hot.(because of the turbo). The stock intake is more restrictive but, at least takes cold air in from that front/fender.
Well, if you're happy and notice a difference then it must be all good.
Oh yeah, a number of reviews on that website stated that the intake helped with turbo lag or low end torque problems on the standard wrx. Notice any increased pick up or anything?
Well, if you're happy and notice a difference then it must be all good.
Oh yeah, a number of reviews on that website stated that the intake helped with turbo lag or low end torque problems on the standard wrx. Notice any increased pick up or anything?
09-04-2003 | 01:44 PM
#45
VIP Member
iTrader: (7)
Joined: May 2003
Posts: 4,990
From: on da compz...readin' yo blogz
Car Info: "the loud one"
Originally posted by b_drift
w/o a bov, you might break throttle bodies left and right. remember the signal car about 2 drift events ago? they went through 3-4 tb's. who gives a crap if things are free.
b
nolimit, where is the thing about the GFB bov? i missed it. is it for the regular ones or the stealth one? thanks b
w/o a bov, you might break throttle bodies left and right. remember the signal car about 2 drift events ago? they went through 3-4 tb's. who gives a crap if things are free.
b
nolimit, where is the thing about the GFB bov? i missed it. is it for the regular ones or the stealth one? thanks b
but dont you just love the compressor surge sound?....i love it!!!!