Greddy Type RS Vacuum Setup

[200RX]

Hey everyone.

I've been asking around trying to find out why my car bogs out every now and then. It comes down to my BOV leaking air but I was also wondering if maybe my vacuum line set up is all wrong. So my question is does anyone with this set up know how to run all the vacuum lines? I have a '89 240 with a 1994 black top sr20det. front mount intercooler, full exhaust, 255 fuel pump, deffi boost controller, Greddy type rs bov with piping, and that’s pretty much it. I'm trying to just to get this motor to run correctly before I do any heavy mods.

Thanks!

[nzmoman]

you need to list your setup, but watch out. there are several vacuum threads that can answer your question as well. search for them.

[Tulsa_S-13]

The nipple on the BOV toward the top of the RS should go to a boost only source, meaning it needs to have a line going from some nipple on the IC piping. The nipple towards the base of the RS should go to a post-throttlebody source.

I could be wrong, but I'm fairly certain that it's set up to be almost a "push-pull" type of operation.

[240life]

I run an RS and a similar setup , my rs has only one nipple, I run it to the throttle body. I also have the bov adjustment set pretty tight. I never had any issues like yours.

[Emperor_Tha]

I got my vacumm line hook up at the upper right throttle body nipple. Adjust the bov to hard.

Are I sure the car is bog and not stallng out when slowing down of stopping. Try recircilating the bov back onto the intake

[200RX]

Thanks everyone for answering

So I have this for a setup:

Off my hot pipe I have my BOV and a nipple bunged into the pipe (directly above the turbo) which goes directly to the waste gate.

At the top of my BOV I have one outlet and put the vacuum line from there to the top right nipple of the throttle body

On the intake side (air filter to turbo) I blocked one big hole (bottom) and a small hole (on the top) of the intake tube. There’s one more hole that is plumbed to go into the breather box and I have it doing that.

On the hot pipe again before you go into the intercool (right below the fender wall) there was another hole that I capped off. I'm assuming it could be for recirculation?? Not sure.

After the intercooler and have one vacuum line that connects into the intake plenum (its big in diameter, not sure what it actually goes to)

Now coming off the Throttle body I have the upper right nipple used for the BOV, left upper nipple used for Deffi Boost Controller ("T'd" in with FPR)and the lower left nipple is capped.

Let me know if this is correct!

[240life]

I use no emissions canisterOn my set up I have my wastegate to my hot pipe nipple my ebc has a solenoid that recieves signal from from that line also. My ebc control unit has a line that is teed into my fpr, off of the throttle body. The left nipple on my throttle body is for my bov and turbo timer. The large nipple on the bottom of the throttle body is capped. Hope that helped

[200RX]

So you’re using the left nipple on the throttle body for your BOV rather than the right...interesting. Also is your Waste gate line going from the hot pipe directly to the waste gate? Or did you T it to you EBC? Right now I have on my Throttle body a line coming from the top left nipple, Teed where one line comes from the FPR, the other from the left top throttle body nipple and then goes into the EBC. I'll go try that set up right now and see what happens. Thanks!
Modified by 200RX at 5:15 AM 9/18/2008

[240life]

from my wastegate i go to the ebc solenoid from the solenoid to the nipple on my hot pipe. You controller will have it's own source that goes to the t on your fpr.

[200RX]

This is how i have mine set up

[240life]

should be fine set like that

[200RX]

Nice nice, ok so I think I found the problem. My bov leaks so I was wondering how to run it to reticulate back in. Where should I plumb it into?

[240life]

i am pretty sure the place you show plugged on the pipeing. I'm not really sure how to recirc the RS though if you figure it out you should post it here. I have been interested in possibly doing this, even though I didn't have a stalling issue running atmospheric. I would try setting your bov to a harder setting and see if that helps.

[schanne]

You need to get the recirculated fitting for the bov first. I forgot what size I used, but then get the same size nipple/bung welded on your air intake pipe. It needs to be welded in between the maf and turbo. Connect the right size hose and presto!

[Kalypso]

This is how i have mine set up

excellent!!

[240life]

interesting...now I know incase I run into a situation where I have to do this

[200RX]

Woo thanks for the help guys

[exhsturbine]

i noticed in the diagram, you have a defi boost controller, yet.... it isnt running to the wastegate (ie: not controlling boost)? the waste gate just has a line running back to it from the hot pipe? is this correct?

however concerning the bov.... the vacuum line is set up correct. my rs is a little tight but it works fine. and if its leaking, i wouldnt recirculate it just to fix the lost boost, i think there would still be 'some' response lost and is just band aiding the problem. try tightening it like 240life suggested, and if that doesnt work, see if you can take it apart and maybe the problem will lie inside. if not. see if you can afford another. but, how sure are you that your "bogging down" is caused by a bov? can you give a better description of your problem?
Modified by exhsturbine at 1:03 PM 9/19/2008

[240life]

I would hope he has the solenoid hooked to the waste gate considering that controls signal ( plus I mentioned it several times )

[exhsturbine]

.

I would hope he has the solenoid hooked to the waste gate considering that controls signal ( plus I mentioned it several times )

oh yeah!

by the way 240 life had a good point about the solenoid and boost controller being hooked up correctly....... hahaha there you go man!

[WizardBlack]

Top nipple goes to a pressure source AFTER the throttle body (some TB's have a fitting that is tapped into the air after the throttle blade, but check it to be sure). Leave the bottom fitting open to the air. One method to ensure you have the right location is to tap off of whatever is feeding the fuel pressure regulator.

[Kalypso]

solenoid?

can someone make a diagram 2.0?

I am having a vaccum leak and this thread is especially pertinent

[exhsturbine]

by using "solenoid" he is talking about the boost controller.

[Kalypso]

by using "solenoid" he is talking about the boost controller.

gotcha, no boost controller for me yet,

I do notice that my brake pedal gets stiffer when I rev the engine and open the throttle.

when I let off, it sinks again.

it sounds like a vaccum leak, but I want to be sure that there are no ports or hoses, not listed on that diagram.

I will recheck all the ones I have, and try again. thanks for all your help