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Location:
Melb, Victoria
Registered:
April 2004
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BOV Mounting location?(with pic)
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Sun, 10 April 2005 09:57
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hey guys, i'm thinking about adding a venting blow off valve to my setup. here's a dodgy diagram of my current setup,indicating where i want to mount the bov. in real life it's approx 1/2 foot away from the intercooler on the hot side. (p.s i made a mistake in the diagram.bov is to be mounted on the hot pipe..)
Is there anything wrong with this option? i know there is some disagreements between people, but will the valve work just as good here as any place?
thanks 
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Location:
brisbane
Registered:
December 2004
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Re: BOV Mounting location?(with pic)
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Sun, 10 April 2005 09:59
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yer nezza has his there its fine...
bov is a just asking for a defect unless u need one i rekon
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Location:
Melb, Victoria
Registered:
April 2004
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Re: BOV Mounting location?(with pic)
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Sun, 10 April 2005 10:15
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Neil's still got the top mount though.. i've got a front mount with all the extra piping, i'm not sure if it will make a difference.
i know about the possible defects, but ohh well...as it is, cops and other people dont look twice at my "STOCK" celica.
thanks for the reply mate
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: BOV Mounting location?(with pic)
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Sun, 10 April 2005 22:06
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as close to the throttle body as possible. is optimum imho.
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Location:
Parramatta
Registered:
July 2002
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Re: BOV Mounting location?(with pic)
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Sun, 10 April 2005 23:40
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as close to the throttle body as possible. is optimum imho.
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the hot side is not the throtle bodie thats the turbo side, if the throtle bodie is the hot side there is problems.
thats how i have mine no dramas works fine.
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Location:
Sydney
Registered:
October 2003
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Re: BOV Mounting location?(with pic)
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Sun, 10 April 2005 23:59
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| -==L=a=N=c=E==- wrote on Mon, 11 April 2005 08:06 |
as close to the throttle body as possible. is optimum imho.
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I would have thought it would be better as close as possible to the turbo (the hot side) similar to the design of the factory sw20. If you had it close to the throttle body, imagine the whole system being pressurised, you'd have to let out a fair bit of gas before reducing the slowing effect on the turbo. Where as if it where close to the turbo, the effect would be almost immediate relief for the turbo and may even help to keep the rest of the system remain slightly pressurised for the next gear.
I'm sure I'm going to melt my plastic bosch BOV when I test this theory though 
Disclaimer: I'm just talking out of my arse, I really have no idea on the topic...
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 02:01
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well i think of it this way.
with the bov mounted at the base of the throttle, you are allowing the air to escape in a nice flow instead of hitting the throttle. If you have it close to the throttle, then the air flow doesn't get disrupted, and keeps on flowing. Almost like a vacuum effect.
Haveing it as close to the turbo would also work, but you would get flow back, as the compressed air hits the throttle, and wants to flow backwards again. kinda defeats the purpose.
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Location:
Newcastle
Registered:
June 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 02:12
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Well i would think that the best palce would be before the intercooler since the you're releasing the hot air before it gets to the intercooler, so that the intercooler doesn't heat up so much. Wouldn't make a big difference but that's what i would do.
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 02:18
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all intents and purposes, does it really matter? the end effect is gonna be the same.
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Location:
brisbane
Registered:
December 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 05:12
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i agree with lance on this one... not right ontop fot he thorttle body but bnetween the coolr and thorttle body is good
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Location:
Melb, Victoria
Registered:
April 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 09:32
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Well after reading everyone's opinion, i've come to my next question: the car is running a factory ecu, therefore using a AFM. will the mounting location have any effect on the running of the car when the bov opens? (eg. increases backfiring, possible stalling problems..)
or does that sort of thing have more to do with the type of bov and the spring setting?
cheers
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 10:12
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doesn't matter where you mount it, your still gonna have the same affect of running rich as when you change gears under boost.
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Location:
Sydney
Registered:
October 2003
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Re: BOV Mounting location?(with pic)
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Mon, 11 April 2005 20:10
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Yep, and to overcome that you need to plumb the air that you are expelling back between the AFM and the turbo.
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Location:
Adelaide
Registered:
May 2002
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Re: BOV Mounting location?(with pic)
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Tue, 12 April 2005 02:51
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if you have the valve after the intercooler and vent it back after the afm into the turbo you have yourself some refrigerated inlet air... possibly lower than ambient (releasing presurised gas after it has been cooled to ambient or above by the intercooler will decrease its temperature)... (this probably wouldn't happen but it's possible )
should be good for an extra 50rwkw 
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Location:
Newcastle
Registered:
June 2004
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Re: BOV Mounting location?(with pic)
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Tue, 12 April 2005 03:44
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| RobertoX wrote on Tue, 12 April 2005 12:51 |
possibly lower than ambient
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You're joking right? How is the air (being cooled by amient temp air going through the intercooler) going to be cooler than ambient? Now i haven't done any physics but that sounds a little strange doesn't it...
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Location:
Adelaide
Registered:
May 2002
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Re: BOV Mounting location?(with pic)
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Tue, 12 April 2005 04:49
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Then read some physics and you will find out
Or spray a deoderant can on yourself and feel how cold the liquid that comes out is, for fun hold it really close and keep spraying, see how long you can stand it for  ... the can is at ambient temp and so is the liquid inside (its not cold 'cos the alcohol evaporates off your skin either... well it partly is but also because ). Same principle.
Seriously this probably wouldnt have any noticable effect but it is theoretically possible, I just thought I'd add it to the thread as basic physics is so 'in vogue' on toymods at the moment.
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Location:
Brisbane
Registered:
March 2003
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Re: BOV Mounting location?(with pic)
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Tue, 12 April 2005 05:20
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Think of it this way.
Compress air, it gets hotter.
Decompress air, it gets cooler.
Compress air, then cool it to ambient.
Decompress it, it will be cooler than ambient.
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Location:
Newcastle
Registered:
June 2004
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Re: BOV Mounting location?(with pic)
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Tue, 12 April 2005 08:00
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Yeah no dramas, i re-read your post and i'm diggin ya now. It's an interesting point. You'll have to have a decent front mount intercooler to cool it to ambient though.
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