Can i use a bov of from the cold pipe

[s13drft89]

Hey, is there anyway i can use a bo from the cold pipe, because the smic iam going to be using the bov is on the cold side, but iam confused because i have seen sr20 guys or ka-t guys use it on the hotside, but also on my bro eclipse gsx its running on the pipe coming from the intake mani(cold pipe), so can i???

[C-Kwik]

It can be used on any portion of the pressurized plumbing(between the turbo and intake manifold).

[Jookmasta]

yes +1

[scarboroughdub]

the best place is the cold pipe or as far way from the turbo as possible, especially if it is a maf metered setup.

[C-Kwik]

the best place is the cold pipe or as far way from the turbo as possible, especially if it is a maf metered setup.

What technical data do you have to back this statement? I haven't seen any either way. And both would appear to work fine.

As far as a metered system, it doesn't make a difference where the BOV is. The BOV's only job is to prevent the turbo from seeing surge. The only concern with theMAF would be where you re-route the BOV air as there have been many cases where routing it in just behind the MAF and at a poor entry angle has caused stumbles and stalling as it disrupts the MAF reading.

[scarboroughdub]

the technical data that i have is from personal experience, all the cars that i have built seemed to suffer more from a atmospheric dump of air if the bov was located on the hot pipe, when located on the coldpipe these issues went away drastically.

hence why all these guys that run a atmo bov and use decel options like on the SAFC to compensate for lost metered air in the system.

i have found that placing the bov on the cold pipe is very benificial then the hotpipe.

either way take it as you want it i know what works since it worked for me.

[s13drft89]

Also one other question, for the vacumm line on the bov, on my cold pipe (leading from the intercooler to the throttle body) there is a nipple where i can put a line to it, is there any way i can use that, or the vacumm lines under the throttle body can i T one of those of. I need a line for my boost gauge and bov. thanks

[C-Kwik]

the technical data that i have is from personal experience, all the cars that i have built seemed to suffer more from a atmospheric dump of air if the bov was located on the hot pipe, when located on the coldpipe these issues went away drastically.

hence why all these guys that run a atmo bov and use decel options like on the SAFC to compensate for lost metered air in the system.

i have found that placing the bov on the cold pipe is very benificial then the hotpipe.

either way take it as you want it i know what works since it worked for me.

I think you are posting from a standpoint of keeping the engine from stalling. While I don't see how it would make a difference, My post comes from a standpoint of what a BOV was designed for. To reduce/eliminate surge when you close the throttle during boost. BOV sounds are side effects. Saving your turbo is the primary purpose. From this standpoint, keeping the motor from stalling is irrelevant. One can simply recirculate the BOV to keep from stalling.

On a side note however, if you are not stalling while running an open atmo BOV, I have to wonder if it's releasing enough air. If the BOV does not allow enough airflow to escape to at least keep up with the airflow the turbo sees, it will surge. The amount of airflow should not be vastly different unless you are seeing a large pressure drop across your IC core. And in this case, it would mean the turbo is actually seeing more pressure than the BOV does. This could mean your turbo may be seeing more surge then it should.

[C-Kwik]

Also one other question, for the vacumm line on the bov, on my cold pipe (leading from the intercooler to the throttle body) there is a nipple where i can put a line to it, is there any way i can use that, or the vacumm lines under the throttle body can i T one of those of. I need a line for my boost gauge and bov. thanks

I tee off the line going to the FPR for both the Boost gauge and the BOV.