just a stupid question about BOV

[idiot goes sideways]

the question is simple,
i saw many pics where the bov is mountet on the hotpipe?
also where the bov is mounted in front of the throttlebody?
whats the difference??? does it make a difference how the mounted???


good driver`s have the fly`s on the side window`s,
i had those on the back window

[NemeGuero]

difference is if you're running a blow through or pull through MAF.

[go240]

difference is if you're running a blow through or pull through MAF.
that isn't really a factor - i think you were thinking atmospheric or recirculated. then maf placement would matter.
the bov can go on either the hot or coldpipe. it works fine either way. its probably a little more responsive on the coldside (near the tb) though.

[NemeGuero]

doh, you're right.. my mistake
the only real difference is that you cool the air before you expend it with it after the IC. some people think, why cool air that you aren't going to use?

[SoSideways]

doh, you're right.. my mistake
the only real difference is that you cool the air before you expend it with it after the IC. some people think, why cool air that you aren't going to use?

What?

Anyways, most people that run atmospheric BOV on their SR swapped cars on the hot pipe because they buy the kits that allow them to reuse their stock rubber hoses.

The others buy it because there are hotpipes readily available in the US with BOV flanges already welded on there.

The advantage to running the BOV on the hot side is that if you want to recirculate your BOV, then it's much much easier with the BOV on the hotpipe, as it's right next to the turbo inlet tube/pipe.

If you have room to put the BOV on the cold side (many people are still running a battery in stock location, thus reducing the amount of space by the cold pipe), then I'd recommend mounting it there, for the BOV will be more responsive.

Less vacuum lines = quicker actuations.

This setup (on the cold side) would not favor a recirculation setup because then you'd have to run a looooonnng as hell pipe/hose all the way across the front of the engine. It'll look like ass and I'm sure it'll take awhile for the air to reach the other side of the engine bay, thus giving up part of the "responsiveness" that you had before by placing it on the cold side.

[kuramaya]

The closer to the throttle plate the better...it is much easier to install on the hotpipe though since the majority of the BOV kits come pre designed to cut your stock hot pipe out and drop in the flanged one for the BOV....

[NemeGuero]

What?


if its after the IC, you cool the air you "blow-off", before the IC, it doesn't ever make it to the intercooler. get it now?

[idiot goes sideways]

okay before the tb is better (lucky, i already mounted it there).
by the way, what type of bov do you prefer??

[SoSideways]

if its after the IC, you cool the air you "blow-off", before the IC, it doesn't ever make it to the intercooler. get it now?

Um, it doesn't really matter dude, if you think that little bit of "cool air" you blew off matters much, over the fact that you get a better throttle response from the BOV on the cold side, then, then mount it on the hotpipe.

Anyways...

I have the Greddy Type R BOV, it works absolutely great. I have it pretty tight, to the point where anything from 2psi and below is pretty much compressor surge.

[NemeGuero]

Um, it doesn't really matter dude, if you think that little bit of "cool air" you blew off matters much, over the fact that you get a better throttle response from the BOV on the cold side, then, then mount it on the hotpipe.

Anyways...

I have the Greddy Type R BOV, it works absolutely great. I have it pretty tight, to the point where anything from 2psi and below is pretty much compressor surge.

You didn't understand what I said, I clarified.
my BOV is already mounted. and none of it really matters..

[SoSideways]

You didn't understand what I said, I clarified.
my BOV is already mounted. and none of it really matters..

No I understood what you were saying, just don't think it matters.

And since you already have your's mounted, why even bring this little bit of "useless" info up?

I already have mine mounted too.

Anyways, I'm done with this thread.

[NemeGuero]

Then why did you ask "what?" don't try to cover your ass. I was informing the thread starter.

[nsn240]

Im mounted mine (coldside)... i figured since the TB is right there, there is faster release from the bov, and you can still keep some pressure, good thing, to keep boost. Putting it on the hotside makes it easier to recirculate, but possibly lesser performance... as you have probably seen, you can buy kits that have the bov flange already welded on, which is a great option

[REDSH!FT]

Think about it for a minute...

So what if you're expelling the cooled air from the cold side? It's not like the hot air wasn't planning on going through the intercooler, but now it has to...
The air is going on a one way track *unless you dont have a BOV of course lol*
It dosent matter where it's released from because either way, it's going into the intake, through the turbo, through the intercooler and into the throttle body.

[Silverbullet]

temp of the air released really does not have to do with anything relevant to its function.

its just for response purposes. About 15-20 inches away from throttle body is best location for BOV so ppl say.

Im recirculating a BOV on my cold pipe BTW. I just have a hose running across my radiator haha.

[idiot goes sideways]

okay thanks for the info, the question where the bov has to be mounted is cleared (so i think),
i also prefer the cold pipe side cause the bov`s work is to make better response.
but theoretical i must NemeGuero give one thing, when i blow the heated air from the turbo after the IC, more air would heat the IC than otherwise, i know its so less that it REALY DOESN`T MATTER but like i said theoretical.

lets go to a another question, i bought a realy cheap bov, never tried a expensive one like greedy ore else like this (the money, you know),
does anyone have experience between a cheap and a expensive one??,
should i worry about a cheap one?? ore pay i just the name for the expensive one??

[NemeGuero]

if you want to get a good/cheap one.. use a 1G DSM BOV, they can be had for $50-$60 bucks and are actually really good blow off valves.