puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

basicly as tittle says...

me and my friend are arguing about it, he wants me to pu my BOV on the turbo side of the intercooler basicly cause he says it's gonna sound louder... and also cause it will reduce the pressure faster from the turbo wheels...

is there any advantage to putting the BOV on one of the side of the FMIC... cause it's not often that you see a HONDA with BOV on turbo side

before I forget, I have a b18b engine runing 10psi (on garrett T3 if someone's curious)

thanks :6

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Im not by any means the smartest person on the boards but I would think A) it wouldnt be any louder, if you have 10psi of air, you have 10psi of air, no matter where in the system. Also I think the difference to the turbo would be very minimal at the same time, Once the BOV opens I think pressure drops so fast it doesnt make too much of a difference where it is located. Im sure there could be "bad" places to put a bov, but I think almost any would work. There are turbos with internal BOV's, Intercoolers with BOV's, and BOV's on the upper charge pipe....All seem to work fine.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Am I right in saying that the closer to the intercooler the BOV is, the better? Not on the other side though?

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I don't think it matters. The throttle plate closes, air builds up and is let out the BOV....as long as it's between the compressor blades and the throttle plate then I think it's all good.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Ya thats what I was trying to say, but I tried to explain it.....bad attempt lol

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Well the BOV is made to blow off boost that actually makes it back to the turbo. So technically, closer to the turbo is the least wasteful. If its after the IC, you're blowing off boost that's might not even make it back to the turbo and well its also already cooled air. Kinda wasteful. If its before the IC, it'll bleed only the boost that actually makes it back, and it'll be quicker fill the system back up with boost...if that makes sense. But at this point your counting hairs..so yeah. For ease of installation- (Mainly for a close vaccuum source) I'd say the cold side is just fine :)

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

hahah it doesnt ------- matter, no matter where the pressure in the pipe escapes, ther eis stil a pressure drop from "blowing off. pick a spot on the piping, mount it and shut up. mount it on the cooler, weld it to your compressor housing who cares. it wont be any louder, and it will function just the same.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Depending on your IC you can have about a 3 PSI drop from going through the intercooler... so 10 from the turbo can be 7 to the intake mani.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

air, like electricity takes the path of least resistence when it is pressurized.

wherever you upen up the circuit, you create a zero resistence outlet. the pressurized air will naturally flow there.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

the tb is closed, and the turbo is still flowing air towards the tb. as long as the bov is somewhere on that tract your good, and on the new srt4s and mercedes ive seen, the bov is actually part of the compressor housing.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

This is getting quite common these days. The SRT4 doesn't even have an exhaust manifold. The exhaust manifold, turbine housing and first part of the downpipe are a single casting!

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

total weirdness :S

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

bovs are meant to do their job,
but i did have a setup(which i sold) that had the bov
placed before the intercooler...a buddy of mine had
some what had the same setup too...but his bov was
placed on the charge pipe before the tb...we had the same
bovs(greddy type s) but both of are bovs had different sound. Mine
sounded like a gush of air and his had the
greddy type s sound...weird and i could never figure out why...
we even swapped out bovs...it was still the same..

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

The entire turbo/motor setup contributes to the sound of the BOV as well....

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I've run my bov on both hot and cold sides on my 240sx. Makes no difference.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I run my BOV in my muffler and I don't even need a turbo to get that cool sound. Thanks ebay! 8) Sorry just had to add that. lol. Just mount before the TB and you set. Why mount it on the IC?

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

i really dont know why the guy put the
bov on the charge pipe before the intercooler.
But everything worked like its suppost to, and i
did not care where the bov was as long as everthing
worked.

--my advice just pick a spot and put the bov there.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

i have had mine in both places. i kept in before the ic/after the turbo. really all it did was sound alittle different. but people said it is better for the turbo. don't ask me why. i was just told that

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

There seems to always be arguments about this, seems to me there is not right or wrong...I've heard people say has to be like a foot away from the TB and others say it has to be right after the turbo...The mazda has it between the turbo and intercooler and recircs it back right after the air filter...i would think since the reason to have a BOV is to protect the compressor wheel the closer to the turbo would be fail proof, just makes sense but if you bleed it off near the TB it should escape before it could reach the turbo...I could see in a rare case that with the BOV near the TB there being a chance of millisecond delay and over time a small amount of pressure making it back to the turbo <---I really don't think this would happen but you never know and this could even be true for a setup right next to the turbo...If we are voting I'd say closer to the turbo for durability, but why take my word i ran 6psi without a BOV so i don't even count ah ha ha ha

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

that sucks where you have to replace something

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I dont think it matters either . All the BOV is doing is bleeding off pressure to prevent the turbo from stalling under closed thottle . As for it bleeding off hot or cold air , that is redundant .

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

i would have to say it would matter what kind of bov you have.

Like for example if it were a Piston type (TurboXS RFL for example) then it shouldn't matter

But if you had a diaphram type (1g dsm bov for example) then i would think if you placed it on the hot side (turbo side) that it could hurt the diaphram (cracks and shizzle)

Don't take this 100% seriously this is just a thesis.

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I read it is best to place the BOV 1-2 ft. from the throttle body, i forget where i read that, but i just remember reading it, and not from some bullshit site like honda-tech...

Re: puting BOV on turbo side of the FMIC... good/bad/nothing to do?
 

I finished installing my turbo kit this morning at 6:10AM

im dead tired and im at work right now, but what I can say is that when I pop the hood and make the engine go to 4500RPM or so, when I release it, the BOV makes a clear LOUD noise from expulsing the air from the piping....

I don't know if it's related to the fact that I put my BOV 1foot from my Turbo ...


ALL I CAN SAY IS: DAMN DUDES! IM FINALLY BOOSTED! O0 O0 O0

pics gonna be in another post today later on!