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Old 11-06-2001, 08:17 PM   #1
paul nieto
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Talking Go Fast Bits Bow off valve

Wow what a piece of artwork. Paid $179. at Exeter subaru,works Great. Blows back to meter and atmosphere,but you can block off meter so it's louder to atmosphere. Not necessary though, loud enough hooked up stock. if you do a intake you can hear it there too .
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Old 11-08-2001, 08:18 AM   #2
wrxteme
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Default Paul

Are you running stock boost? Have you run it 100% atmos?
I just want to know if how it works without any other mods.
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Old 11-08-2001, 09:14 AM   #3
STEVESblueWRX
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Default BE CAREFUL

I have the same BOV and an intake, my CEL went off and they said I was running to lean and to take off the parts!!!
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Old 11-11-2001, 02:11 AM   #4
paul nieto
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Smile No cel on my dash.

Sorry guys, i haven't been on in awhile . I haven't had any check engine lights or any problems at all, I also have a BPM gt turbo back exhaust. every part i installed made a seat of the pants difference. On my boost gauge i didn't see any increase in overall boost but what i noticed was no more lag. Boost comes on much quicker, maybe 1/2 a pound of boost. E.V.C is next with fuel defencer, Then Track to see the truth. my goal is low 12's,i i don't want to say 11's because i'm not familiar with the car. So i'm hoping for 12's (anywhere). As far as the B.O.V, when i did the INJEN intake the blow off sound (whistle) was more sensitive and louder.
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Old 11-11-2001, 02:14 AM   #5
paul nieto
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Default Re: No cel on my dash.

Quote:
Originally posted by paul nieto
Sorry guys, i haven't been on in awhile . I haven't had any check engine lights or any problems at all, I also have a BPM gt turbo back exhaust. every part i installed made a seat of the pants difference. On my boost gauge i didn't see any increase in overall boost but what i noticed was no more lag. Boost comes on much quicker, maybe 1/2 a pound of boost. E.V.C is next with fuel defencer, Then Track to see the truth. my goal is low 12's,i i don't want to say 11's because i'm not familiar with the car. So i'm hoping for 12's (anywhere). As far as the B.O.V, when i did the INJEN intake the blow off sound (whistle) was more sensitive and louder.
but for now car is in the shop. I had an accident (my fault) but will have info soon. It's not perfect anymore so i'm going to drive it like i stole it.
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Old 11-11-2001, 04:42 AM   #6
SK00Impreza
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WR Blue - TurboXS Stage 2

Question

Is the GFB BOV the same as the MRT one?
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Old 11-14-2001, 11:04 PM   #7
neurotic
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Default

It was referred to as MRT here and there by a couple people, so I would say yes - but I don't see them selling the GFB BOV on their webpage.
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Old 11-26-2001, 09:00 PM   #8
Twelvz
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Running to lean !? I think thats a bunch of bs...ecu errors to the side of rich, plus bov won't make a damn bit of difference for your air/fuel ratio
I have a few things done to my car and I have a air/fuel gauge hooked up...I've NEVER run lean
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Old 11-27-2001, 02:25 AM   #9
racerrex
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Love my GFB. Looks hot. Has that whoosh sound without being too obnoxious. And the turbo spools much faster between gear shifts. Cant beat it
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Old 12-03-2001, 12:23 AM   #10
WRXnFX
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GFB is not MRT
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Old 12-11-2001, 06:23 PM   #11
STEVESblueWRX
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Thumbs up NO CEL ???

I am glad no one else had a CEL for running "to lean". I wish I had a copy of this post when I brought my car to Grand Prix SOA for service. I may have been my airfilter??? I guess now that the codes gone it doesn't matter. If it comes back at least I'll be prepared and remove everything I did so they have no excuses to say it was my fault.
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Old 12-21-2001, 05:12 PM   #12
nhluhr
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Quote:
Originally posted by Twelvz
Running to lean !? I think thats a bunch of bs...ecu errors to the side of rich, plus bov won't make a damn bit of difference for your air/fuel ratio
I have a few things done to my car and I have a air/fuel gauge hooked up...I've NEVER run lean
yeah thanks for your opinion, but it's wrong.

It is QUITE possible to get the WRX running very lean. Many of the aftermarket CAIs have larger-than normal diameters around the MAF so they effectively trick the ECU into running the wrong A/F.

a BOV can VERY EASILY make a difference in the A/F ratio if it is venting to atmosphere. All the air that blows out of the BOV has been metered by the MAF and if it doesn't go through the engine and burn the fuel, then the engine will be running very rich for the few seconds the BOV is operating.
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Old 12-23-2001, 05:59 AM   #13
WRXnFX
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I have the GFB BOV. looks and sounds great. easy install running 100% no problems.
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Old 12-27-2001, 10:17 PM   #14
Rebellion
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Default

love mine... but it's probably coming off for autox season...
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Old 01-07-2002, 03:01 PM   #15
BlueDemon
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Question Running Rich??

nhluhr, would this running rich for a few seconds while the BOV is engaged do much in the way of harming one's engine?

I don't have any CEL issues, nor do I have an air/fuel gauge, so I don't know what's happening inside.......... just some insight would be helpful

Blue
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Old 01-08-2002, 05:38 PM   #16
scoobi02
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Love my GFB BOV. It is my only engine modification and I have had no problems. And if anybody is looking for one I have and extra one.
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Old 01-08-2002, 06:19 PM   #17
STEVESblueWRX
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Angry DEALERSHIP WAS FULL OF......

Don't service your car at Grand Prix Subaru. I am the one that said the be careful the GFB BOV can cause a CEL. It did to mine and Subaru said I was running lean and it was from my GFB BOV. I NEVER removed it after they cleared the code and have had no CEL since....I hope I didn't just jinx it....Well that said I highly recommend this product. It fits great, looks great, and sounds great.
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Old 01-09-2002, 03:41 PM   #18
christoph1371
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I am a big proponent for NON BOV! They are lame and useless and a waste of money that could be spent on stuff that the WRX could really use.

Ok, that being said, I did start my own business and it seems that people want these stupid toys. SOoooo, I had to get them to see what they hell you guys are always ooooing and awwing over. I got the GFB BOV and it's looks good in the package. I put it on and drove around. Hmmmm, not too annoying....keeps the turbo spinning AFTER boost is released...sound is minimal.

Overall, I liked it, because it was not too loud and help the turbo from excessive wear. But I still say that BOV aren't critical until 18-22 psi.

FLAME on
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Old 01-10-2002, 10:10 PM   #19
wrxracer
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Talking GFB BOV

i have the same BOV as you and have had no CEL's or problems. this was my first mod, but now i run about 16psi, a turbo back exhaust and a injen intake...still after months no CEL's.
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Old 01-15-2002, 06:51 PM   #20
martel
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I have this BOV installed 50/50.
only other mod is silercer removal.
i've got this strange warbling noise if i lift throttle before the turbo is fully spooled.
it was VERY noticable at 100%...
most noticable in 4th gear. anything heard this phantom noise???
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Old 01-26-2002, 10:14 PM   #21
SFastWRX
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I am Oz

Default

I just installed the GFB BOV too. I haven't had it on very long yet, but I did notice that the loss of momentum during shifting was definitely lessened - meaning there was boost available immediately after shifting. Nice, because I wasn't expecting it. The sound is just right at 50/50, you know it's there, but it's not annoying to anyone.

As for BOV's being a lame waste of money - I say that money you enjoy wasting is not wasted money. I don't see a practical use for amusement parks, either, but they keep building them just the same, and people enjoy them. Just MHO.
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Old 01-29-2002, 01:39 PM   #22
werx4me
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Default

Quote:
Originally posted by nhluhr


yeah thanks for your opinion, but it's wrong.

It is QUITE possible to get the WRX running very lean. Many of the aftermarket CAIs have larger-than normal diameters around the MAF so they effectively trick the ECU into running the wrong A/F.

a BOV can VERY EASILY make a difference in the A/F ratio if it is venting to atmosphere. All the air that blows out of the BOV has been metered by the MAF and if it doesn't go through the engine and burn the fuel, then the engine will be running very rich for the few seconds the BOV is operating.
Hi,
I've got 2 WRX's. One with no mods had the CEL at about 3000 mi. The dealer said it's a known problem and is going to reprogram the ECU (giving me a loaner car while mine is off the road).
The other WRX has some nice mods, including the COBB APS BOV, Profec B, HKS cat-back, etc... The BOV does not make the engine run lean, but will for a very brief time make it run rich as you've pointed out. The only thing this might do is give you a "popping" sound out the exhaust when you take your foot off the accellerator. It won't harm anything. Subaru's ECU errs on the side of a rich mixture, so about the only way to lean it out is to boost past the point where the fuel system can deliver what the ECU is demanding. I believe the stock turbo would have trouble doing that... Anyway, that car has only about 1800 miles on it, so I don't yet know if I'll have the same CEL issues as the first one.
My humble guess is that this is an ECU issue, not a mod issue. How many miles are on the car?
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Old 03-02-2002, 09:08 PM   #23
relayer66
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Default

i got mine in silver to match my car. very pretty, sounds great, easy install, no problems...love it, love it, love it!
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Old 03-12-2002, 01:55 PM   #24
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Put mine on this weekend, and despite being scared of removing the intercooler, it only took an hour. Works great, but has anyone tried using the included plug to block off venting back to the intake, and just make it vent to atmosphere only? Otherwise a worthy mod, that has produced a conservative 79 hps
Adam
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Old 03-17-2002, 04:40 PM   #25
MattWRX20
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Default 100% Atmosphere

I just installed the GFB BOV and I like it a lot. I was also wondering if I went to 100% venting, would I hurt the engine, or mess with the A/F mixture? Has anyone else gone to 100% atmosphere? Please send me email if you have any info.

mattw@oslc.org
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