Boost controller vacuum set-up

[weirdchris555]

Ok. Here is my question. I have a world electronics PBC electronic boost controller. My question is not with hooking it up to my line from my actuator, but hooking up the pressure sensor for the boost controller to a vac line. I already have a boost gauge installed and it is tee'd off of my FPR. I heard over and over not to touch the line that runs to my BOV, so isnt that out of the question? I guess what I am looking for is if it is alright to run two Tee's, one for the sensor and one for my gauge, off of the FPR one. Thanks in advance, Much appreciated.

[sideways_s14]

s13 or s14 sr? intake manifolds are different...

[fliprayzin240sx]

SR TBs got 3 ports total. 2 on one side and just 1 on the opposite side. The single one by itself only sees pressure. The other 2 sees vacuum, so T it off one of those 2 ports.

[4x4le]

Ok. Here is my question. I have a world electronics PBC electronic boost controller. My question is not with hooking it up to my line from my actuator, but hooking up the pressure sensor for the boost controller to a vac line. I already have a boost gauge installed and it is tee'd off of my FPR. I heard over and over not to touch the line that runs to my BOV, so isnt that out of the question? I guess what I am looking for is if it is alright to run two Tee's, one for the sensor and one for my gauge, off of the FPR one. Thanks in advance, Much appreciated.


You really should try to not T anything off of your fpr. I would just use the fitting that only sees pressure or get a banjo fitting put on your turbo or hot pipe.

Oh, and switch up how you have your vaccume lines. Make the gauge T off the bov NOT the fpr.

[weirdchris555]

Yeah yeah. i know ur not supposed to T off your fpr, but I heard its even worse for the BOV. As long as their is no leaks, T'ing off the FPR should be ok. The . I know it has been for 3-4 years, as long as this car has had the SR in it with that gauge. No leaks. bov should have nothing in its way Its a redtop. I'll look into using that other pressure one for the pressure sensor, but im getting mixed answers from 4x4le and fliprazin240sx. One says to use the pressure one, the other says not too. Thanks.

Also, project car mag used the same ebc and used the fpr. I also know of someone over on nicoclub running two tee's off their fpr. one for the gauge and the other for the EBC pressure sensor.

[4x4le]

I dont see why it would be any worse to run the T on the bov. Your not going to have any down side to doing it to either source either way as long as the vacuum lines stay where they are supposed to be. Its that the more Ts you have the more likely you are to pop one off or make it react a little slower. Its not going to make either act slow enough that it will effect anything and all you really have to worry about it is a line popping off. If the bov line open us during boost it opens up, sounds neat, over spools your turbo a bit possible and you can pull over and put it back on with no problem. If the fpr line popps off under boost your ping like crazy and might pop the motor.

Your choice.

[GSXRJJordan]

I dont see why it would be any worse to run the T on the bov. Your not going to have any down side to doing it to either source either way as long as the vacuum lines stay where they are supposed to be. Its that the more Ts you have the more likely you are to pop one off or make it react a little slower. Its not going to make either act slow enough that it will effect anything and all you really have to worry about it is a line popping off. If the bov line open us during boost it opens up, sounds neat, over spools your turbo a bit possible and you can pull over and put it back on with no problem. If the fpr line popps off under boost your ping like crazy and might pop the motor.

Your choice.

You never tee off the BOV, because the BOV needs the best possible source to open as soon as you close the throttle, and close without leaking out too much air. It makes a difference, and every BOV manufacturer is adamant about not tee'ing off that vacuum source.

On the other hand, tee'ing off the FPR is fine, because the FPR's functionality doesn't change that much with pressure. Every boost controller manual says to tee of that line.

[4x4le]

Like I said, your choice.... I know what I do and have no problems

[g-via]

My fpr line T's off to my BOV, gauge, and vaccum source to my ebc

been doing this for awhiel now....

[GSXRJJordan]

^^^ By the book, you're doing it wrong. It's fine to tee for a sensor/gauge, but you're not supposed to tee the BOV off such a small source.

What're you doing with your 3/16" vacuum port?

[weirdchris555]

Thanks everyone. I also just realized that I could leave the single Tee I have already from the FPR that was for my boost gauge and instead of adding another tee there, add one on the line that goes to my gauge and run that to the sensor. I remember looking at this site, and then it hit me that he had a similar set-up on his 300zx. with pics. Obviously, there are differences. I am still trying to decide, but good info here.

PROFEC B II Installation on a 300ZX (http://www.thumper300zx.com/z32/profecb2/profecb.htm)

[s14unimog]

Are you kidding me..... this many of you missed the most obvious point..... those are vacuum sources... which have absolutely no reason to be involved with a boost controller or boost source for an actuator. Lets take it back to basics. Ever looked at an factory side mount set up for an SR? Ever wonder why there is a nipple on the cold pipe? It's b/c its a BOOST ONLY source for the actuator. This should not be a discussion about which vacuum line to "tee" off of but a discussion about where you can find a boost only source. You have a few options..

Drill and tap your compressor outlet

weld a nipple onto your charge system

install a quick tap through a coupler

turbo engines 101....

[weirdchris555]

...excuse me bud. but as i said in the first post, this is not for hooking up my solenoid. I understand that. I literally said "My question is not with hooking it up to my line from my actuator, but hooking up the pressure sensor for the boost controller to a vac line".

AKA where to draw a line to my PRESSURE SENSOR! Which is most definately involved in a boost controller.

[s14unimog]

you said:

My question is not with hooking it up to my line from my actuator, but hooking up the pressure sensor for the boost controller to a vac line.

I guess you meant to say boost gauge

If you're talking about the boost gauge in you EBC then it really doesn't matter. As long as there aren't any leaks, you wouldn't have a concern for degraded performance from your BOV, FPR or any other component hooked to vacuum.

[weirdchris555]

thanks. im pretty sure there was a communication error back up there. No i did not mean my boost gauge itself. That is all set. I mean the pressure sensor for the ebc, which yes it is like a boost gauge for the controller itself but does a lot more than just a plain o'l gauge. And yeah, ur not supposed to T off the BOV, but your right, as long as there is no leaks. Just as a rule of thumb you shouldn't tee off of the BOV. Should be a straight shot but whatever floats your boat.

[4x4le]

Well I ended up trying out switching up my bov to be on its own line although I really want my fpr to be on its own line for safty reasons, but the bov does make a faster more crisp sound so I know that is helping some. However Im not running a factory throttle body and I only have 2 vaccume sources unless I want to T off my brake booster....

I am going to weld a nipple on my hot pipe for my boost controller and then have only the boost gauge and fpr run off one tb source and the other designated for my bov. I really really dislike the idea of Ting off the fpr though, you have no idea how badly....

[s14unimog]

Glad we got that cleared up.....Your so funny Brandon:yum:

I've got everything run separate b/c I have a Greddy style manifold. If you are concerned about running off the same source, remember all of this is post throttle body, which means you can do a few different things that "t'ing" off. Buy a vacuum block. Hell buy a block of aluminum and drill/tap it your self to make your own vacuum block. IF you're confident enough that you could make one, then instead, pull the manifold and tap your self a few more sources. Its all coming from the same place, so it really just comes down to catching all the leaks for a correct system.

[4x4le]

Yo, make me a iacv delete with a vacuum block dawg!