s14 sr20det vacuum lines - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

dreimers · 05-03-2018, 01:18 PM

I have been searching for clear answers to my questions. i have found some threads that are for the s14 sr vacuum lines, but none of the pictures are working as of now and with out pics i am lost.
I have a Greddy E01 controller, boost gauge, and a HKS bov to hook up to vacuum sources. I know that the S14 sr has a bunch of lines under the throttle body to hook up to. Just need to know which ones to hook to. Pictures are more than valuable to me.

Thank you for the help

Kingtal0n · 05-03-2018, 07:57 PM

the piston pulls on plenum. Any hole, anywhere, from the plenum source, is good for blow off valve, fuel regulator, boost controller/gauge.

If you had an external gate you would want it to receive pressure from a NONvacuum source, such as the pipe before the throttle body. The throttle body HAS one of these ports in it; indeed if you check with your finger/mouth on a running engine you will find that 1 of the throttle body ports has no vacuum with the engine running. If you slightly open the throttle body suddenly it has vacuum a little bit. This is due to it's proximity. Once you've identified this port you should leave it be, cap it, don't bother with it. Use the other ports which lead directly into the plenum.

Any other port. You can drill a new port and thread a npt 1/4" nipple in the plenum if you want. Or use the ports in the back. Only thing you don't wana do is T them, don't make a bunch of T's from one port, or use any LONG runs of hose. It will weaken and delay the signal. For best signal/response from devices (BOOST CONTROLLER) you want a SOLE dedicated vacuum line, a NICE LARGE one.

dreimers · 05-04-2018, 02:50 PM

anyone with a picture of this for me?

Kingtal0n · 05-05-2018, 09:26 AM

A picture of random vacuum lines going to an sr intake plenum? Hmmm

I know it aint what u meant but I cant resist

Lookin at it, notice the gate is fed from the hot pipe through the boost controller.

Lines under the TB:
on the far right is the big fat IACV line, dont mess with that
next to the left of that is 3 vacuum ports.

I blocked off the 1 port with no vacuum on the shut TB and used the other 2 for bypass valve and FPR.

LoSt180 · 05-14-2018, 07:59 PM

Diagram from the FSM. Orange line is where I connected wastegate after upgrading to a fmic from the stock side mount.

05-03-2018, 01:18 PM	#1
dreimers Zilvia Member Join Date: May 2009 Location: Naperville, IL Posts: 280 Trader Rating: (3) Feedback Score: 3 reviews	s14 sr20det vacuum lines I have been searching for clear answers to my questions. i have found some threads that are for the s14 sr vacuum lines, but none of the pictures are working as of now and with out pics i am lost. I have a Greddy E01 controller, boost gauge, and a HKS bov to hook up to vacuum sources. I know that the S14 sr has a bunch of lines under the throttle body to hook up to. Just need to know which ones to hook to. Pictures are more than valuable to me. Thank you for the help __________________ This is a site ran by the US government, not some crazy biased organization

05-04-2018, 02:50 PM	#3
dreimers Zilvia Member Join Date: May 2009 Location: Naperville, IL Posts: 280 Trader Rating: (3) Feedback Score: 3 reviews	anyone with a picture of this for me? __________________ This is a site ran by the US government, not some crazy biased organization Last edited by dreimers; 05-04-2018 at 03:40 PM..

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05-03-2018, 07:57 PM	#2
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17) Feedback Score: 17 reviews	the piston pulls on plenum. Any hole, anywhere, from the plenum source, is good for blow off valve, fuel regulator, boost controller/gauge. If you had an external gate you would want it to receive pressure from a NONvacuum source, such as the pipe before the throttle body. The throttle body HAS one of these ports in it; indeed if you check with your finger/mouth on a running engine you will find that 1 of the throttle body ports has no vacuum with the engine running. If you slightly open the throttle body suddenly it has vacuum a little bit. This is due to it's proximity. Once you've identified this port you should leave it be, cap it, don't bother with it. Use the other ports which lead directly into the plenum. Any other port. You can drill a new port and thread a npt 1/4" nipple in the plenum if you want. Or use the ports in the back. Only thing you don't wana do is T them, don't make a bunch of T's from one port, or use any LONG runs of hose. It will weaken and delay the signal. For best signal/response from devices (BOOST CONTROLLER) you want a SOLE dedicated vacuum line, a NICE LARGE one.

05-05-2018, 09:26 AM	#4
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17) Feedback Score: 17 reviews	A picture of random vacuum lines going to an sr intake plenum? Hmmm I know it aint what u meant but I cant resist Lookin at it, notice the gate is fed from the hot pipe through the boost controller. Lines under the TB: on the far right is the big fat IACV line, dont mess with that next to the left of that is 3 vacuum ports. I blocked off the 1 port with no vacuum on the shut TB and used the other 2 for bypass valve and FPR.

05-14-2018, 07:59 PM	#5
LoSt180 Zilvia Addict Join Date: May 2013 Location: MD Posts: 966 Trader Rating: (18) Feedback Score: 18 reviews	Diagram from the FSM. Orange line is where I connected wastegate after upgrading to a fmic from the stock side mount.