1g bov on lower intercooler pipe

[91-gsx]

hi, has anybody done this? would it be fine to run a line to the bov if it is mounted on the lower intercooler pipe on a side to side fmic? or would this cause some sorta surge?
thanks for the help,
tony

 

[napkinthief]

Any reason you are trying to do this? Best I know is to place the bov as close to the throttle body as possible

 

[alex99gst]

After the throttle plate closed, pressure would have to build up that far through the piping in order for the valve to open. That would cause a lot of backpressure a lot closer to the turbo, which would slow the spool down tremendously. So it isn't a good idea. Any reason why you ask this question?

 

[tstkl]

i saw someone else wanted to do this so they could have there bov vented and pointed out towards the front of the car, because "supra guys do it"

stop trying to cut across the grain, especially if its something as pointless as relocating your bov closer to your turbocharger.

 

[jott5555]

you saw.... hmm ok well as alex stated.. the reason for a "BOV" is to release the built up pressure on the throttle plate when its closed.. just because the cool supra does it dosent mean everyone should..

 

[91-gsx]

, i dont know about all of this supra crap but trust me that is not why i wanna do it. i simply wanted to have the bov on the lower intercooler pipe so that i could put my 3"gm maf right in the beginning of my upper intercooler pipe. why do i want to do this? well i am planning on getting water injection, so if i have the maf in the beginning of the upper intercooler pipe, the rest of the pipe can have a nozzle every 4-6" to inject water. this would obviously make the bov louder too, but that is not the reason i wanted to do it. damn you guys jumped to conclusions really quickly.....
later

 

[larsrya8]

So it isn't a good idea. Any reason why you ask this question?

BOV on the LICP, 2 intake filters instead of 1, velocity stack on intake (pipe, not manifold), EVO 8 turbo on your 1G, eliminating breathers, a turbo without an intercooler, eliminating boost creep through mbc.... 91-gsx has a lot of threads with "unconventional" ideas. Sorry to call you out on this... it's just a trend I've noticed.

You've been talking about water/alcohol injection a lot. I think you've posted in almost every recent thread on the subject. When do you plan on installing it? And how many nozzles are you planning on installing? Three? Four? I thought most people use only one in the throttle body elbow. Maybe adding one extra nozzle one earlier in the piping.

Anyway, as everyone else has stated: the BOV is supposed to relief the pressure in the intercooler pipe after the throttle plate has closed. The best way to do this would be to leave it where it is right now.

 

[91-gsx]

BOV on the LICP, 2 intake filters instead of 1, velocity stack on intake (pipe, not manifold), EVO 8 turbo on your 1G, eliminating breathers, a turbo without an intercooler, eliminating boost creep through mbc.... 91-gsx has a lot of threads with "unconventional" ideas. Sorry to call you out on this... it's just a trend I've noticed.

You've been talking about water/alcohol injection a lot. When do you plan on installing it? And how many nozzles are you planning on installing? Three? Four?

dont forget, 2g fmic on a 1g:
http://www.dsmtuners.com/forums/showthread.php?p=1858009#post1858009

91-gsx has a lot of threads with "unconventional" ideas. Sorry to call you out on this... it's just a trend I've noticed.

nice of you to notice

as for the water injection, that should be in soon as well. i just finished rebuilding my 14b and doing some nice stuff to it so that it can perform better. then finish my fmic install. then i will start pouring in the water..., you should hear the ideas i have with that, but that is for another thread.

i like doing these unconventional things because that is the way i just am, i think too much... it seems to keep people thinking and entertained here as well, "are you not entertained?"
later

 

[larsrya8]

"are you not entertained?"

Gladiator?

 

[IPT]

There is a great article about this here:

http://www.bullseyepower.com/forums/viewtopic.php?t=11

Good information!

 

[alex99gst]

I think that it would be a lot of trouble to go through to redo everything just to have a couple of water nozzles in there. Instead, you could get one nozzle with higher flow and the same results and keep everything the way it is supposed to be with a lot less hassle.

 

[unclesam099]

The nozzle should be fairly close to the TB. When you're on boost, the water will be able to mix just fine, I wouldn't worry about giving it a ton of length to mix thru the pipe unless you were a non-turbo car. Don't forget, you have to have it close enough to get in there and tighten it down

 

[SethA]

BOV on the LICP, 2 intake filters instead of 1, velocity stack on intake (pipe, not manifold), EVO 8 turbo on your 1G, eliminating breathers, a turbo without an intercooler, eliminating boost creep through mbc.... 91-gsx has a lot of threads with "unconventional" ideas. Sorry to call you out on this... it's just a trend I've noticed.

You've been talking about water/alcohol injection a lot. I think you've posted in almost every recent thread on the subject. When do you plan on installing it? And how many nozzles are you planning on installing? Three? Four? I thought most people use only one in the throttle body elbow. Maybe adding one extra nozzle one earlier in the piping.

Anyway, as everyone else has stated: the BOV is supposed to relief the pressure in the intercooler pipe after the throttle plate has closed. The best way to do this would be to leave it where it is right now.

I like to read the "unconventional" idea threads. Thinking outside the box can lead to innovation. The worst thing that happens is I learn why something new won't work. I appreciate people throwing these ideas out there as well as everyone's feedback on these threads.

The bullseye link IPT provided seems to contradict the cool side is better argument. I agree that the vacuum signal will take longer to get to the BOV on the hot side but I can also see that the pressure at the turbo should be relieved faster once the BOV finally does open because the BOV is closer to the compressor. It seems reasonable to me that either placement might be sufficient to prevent surge?

Seth

 

[alex99gst]

The bullseye link IPT provided seems to contradict the cool side is better argument. I agree that the vacuum signal will take longer to get to the BOV on the hot side but I can also see that the pressure at the turbo should be relieved faster once the BOV finally does open because the BOV is closer to the compressor. It seems reasonable to me that either placement might be sufficient to prevent surge?

During boost, the pressure builds from the trubo through the piping. It is the opposite when you let off the gas and the bov opens. From the throttle plate back is where the pressure builds up in the system and opens the bov. The farther back the bov is, the slower it would be venting the excess pressure.

I can agree that thinking outside the box can lead to innovation, but there is a reason why every vendor (that I know of atleast) has been keeping the bov in the stock location on the UICP.

 

[91-gsx]

During boost, the pressure builds from the trubo through the piping. It is the opposite when you let off the gas and the bov opens. From the throttle plate back is where the pressure builds up in the system and opens the bov. The farther back the bov is, the slower it would be venting the excess pressure.

I can agree that thinking outside the box can lead to innovation, but there is a reason why every vendor (that I know of atleast) has been keeping the bov in the stock location on the UICP.

well that reason is that most people are setup for it that way. the way i thought about it is that pressure is relieved fast anyway because the pressure in the lower intercooler pipe is higher then the pressure in the upper. just an idea guys, but i could have sworn i had seen it done somewhere but for a smic.
thanks for the help

 

[boostedinaz]

There are many threads on this and it has gone back and forth on both sides a search would have shown this.

I would put mine as close to the TB as possible because that is were the pressure spikes begin and I want to get rid of it ASAP, not make it travel a few feet.

For further applications look at any high HP dragcar. The BOV is usually pretty close to the TB giving the space is available.

Your car you do what you want.

 

[SethA]

During boost, the pressure builds from the trubo through the piping. It is the opposite when you let off the gas and the bov opens. From the throttle plate back is where the pressure builds up in the system and opens the bov. The farther back the bov is, the slower it would be venting the excess pressure.

I can agree that thinking outside the box can lead to innovation, but there is a reason why every vendor (that I know of atleast) has been keeping the bov in the stock location on the UICP.

I understand what you are saying, but I am not convinced it would take a hotside bov so long to open that a pressure wave could reflect off the throttle plate back through the tubing and intercooler and cause more surge than a cold side bov does. I guess the only way to know for sure is to log the pressure with a transducer and compare the two setups.

The link mentions that some stock turbos have a bov incorporated in their housings. Maybe these turbos were for engines where the vacuum source is closer to the turbo?

You all may very well be correct but Mitsubishi could have chosen the cold side location simply to facilitate recirculation? Most vendors were making uicps before most dsmers ever thought about water/alky injection or GM MAF. Like the rest of us, vendors base their new products on what they have learned from previous products and what they believe they will sell. Doing something unconventional will drive away potential buyers.

Seth

 

[Boosted98gsx]

Theoretically, the BOV is put on the cold side of the charge pipe because colder air is more dense thus making the discharge of the pressurized gas easier and less likely to go backwards and out the turbo. Placing the BOV on the hot side of the intercooler puts you at more risk for compressor surge.

 

[tstkl]

, i dont know about all of this supra crap but trust me that is not why i wanna do it. i simply wanted to have the bov on the lower intercooler pipe so that i could put my 3"gm maf right in the beginning of my upper intercooler pipe. why do i want to do this? well i am planning on getting water injection, so if i have the maf in the beginning of the upper intercooler pipe, the rest of the pipe can have a nozzle every 4-6" to inject water. this would obviously make the bov louder too, but that is not the reason i wanted to do it. damn you guys jumped to conclusions really quickly.....
later

thank god thats an actual good reason.

the man even knows that water screws up your gm maf readings. I had him all wrong.