S13 - Apexi PFC Vacuum line question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

epik1 · 07-11-2014, 03:17 PM

Stupid question.
S13 sr, OEM intake manifold.
I'm going to install power fc d-jetro, where is best place to take a vacuum source off the manifold ? Thanks

as of now:
The left nipple is tee'd off to fpr and a path that goes to a hard line and goes under passenger side.

The right nipple as far as I can tell when I traced it goes to bov.
Is there a 4 way tee or should I tee off right nipple ?

thanks

quickdiversion · 07-11-2014, 04:55 PM

I would look for an independent vacuum source for your map sensor. Also th map sensor should be as close as possible to plenum. The vacuum line should be 12 inches or less for best performance. I would look around for little capped off or plugged holes already drilled.

If you have to drill an tap a hole for a new nipple. The best way to do it is. Remove the throttle body. Insert a vacuum and turn it on. Drill the hole very slow and then tap with the vacuum on! in order to suck up all shavings inside the intake. Put the new nipple in, you can seal it with plumbers tape or lock tight. Once it is in you can take out the vacuum and put the throttle body back on. Now you have a new vacuum source for your map sensor.

epik1 · 07-12-2014, 01:09 PM

the third nipple under the throttle body is okay for independent source ? it's just capped off atm

quickdiversion · 07-12-2014, 01:10 PM

Yup. That will work just fine if it is nothing now

epik1 · 07-12-2014, 01:33 PM

awesome thank you!

jr_ss · 07-12-2014, 02:02 PM

Be careful with sources at the throttle plate. If you look at them, they are before or right at the throttle plate and are not a vac source.

epik1 · 07-12-2014, 02:05 PM

sorry maybe cause I'm a noob, I don't understand clearly. are you saying that the third nipple shouldn't be used ? All I've read about the third nipple, is that it used to be used for carbon canister.

quickdiversion · 07-12-2014, 02:12 PM

There are a lot of emissions and canisters removed from these motors.

So most l likely no.

epik1 · 07-12-2014, 07:07 PM

Quote:

Originally Posted by quickdiversion

There are a lot of emissions and canisters removed from these motors.

So most l likely no.

???? grammar ? lol

quickdiversion · 07-12-2014, 07:09 PM

Grammer is fine.
You obviously do not understand a lot about this motor. Which is fine.

epik1 · 07-12-2014, 07:30 PM

"So most l likely no." I was referring to that.
do you mean "most likely no, you can't use the third nipple"
or "most likely no, you're good to use the third nipple"

I'm still learning lol

jr_ss · 07-12-2014, 09:26 PM

I'm just saying that some of the "vac" ports or nipples aren't necessarily true to that. Just verify that it is in fact a true "vac" source and you'll be fine. Otherwise, you'll only be referencing boost or positive pressure.

epik1 · 07-13-2014, 11:16 AM

thanks guys.
Okay, so after some tracing and stuff I ended up with this :

Left Nipple: FPR + MAP sensor
Right Nipple: Boost Gauge + Boost Controller "BOV?". It goes to my HKS EVC "vacuum block"

07-12-2014, 02:02 PM	#6
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,052 Trader Rating: (34) Feedback Score: 34 reviews	Be careful with sources at the throttle plate. If you look at them, they are before or right at the throttle plate and are not a vac source. __________________ My SR20VET

07-12-2014, 09:26 PM	#12
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,052 Trader Rating: (34) Feedback Score: 34 reviews	I'm just saying that some of the "vac" ports or nipples aren't necessarily true to that. Just verify that it is in fact a true "vac" source and you'll be fine. Otherwise, you'll only be referencing boost or positive pressure. __________________ My SR20VET

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07-11-2014, 04:55 PM	#2
quickdiversion Zilvia Junkie Join Date: Aug 2012 Location: nj Age: 38 Posts: 341 Trader Rating: (4) Feedback Score: 4 reviews	I would look for an independent vacuum source for your map sensor. Also th map sensor should be as close as possible to plenum. The vacuum line should be 12 inches or less for best performance. I would look around for little capped off or plugged holes already drilled. If you have to drill an tap a hole for a new nipple. The best way to do it is. Remove the throttle body. Insert a vacuum and turn it on. Drill the hole very slow and then tap with the vacuum on! in order to suck up all shavings inside the intake. Put the new nipple in, you can seal it with plumbers tape or lock tight. Once it is in you can take out the vacuum and put the throttle body back on. Now you have a new vacuum source for your map sensor.

07-12-2014, 01:09 PM	#3
epik1 Zilvia Member Join Date: Mar 2011 Location: Scarberia, Ontario, Canada Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	the third nipple under the throttle body is okay for independent source ? it's just capped off atm

07-12-2014, 01:10 PM	#4
quickdiversion Zilvia Junkie Join Date: Aug 2012 Location: nj Age: 38 Posts: 341 Trader Rating: (4) Feedback Score: 4 reviews	Yup. That will work just fine if it is nothing now

07-12-2014, 01:33 PM	#5
epik1 Zilvia Member Join Date: Mar 2011 Location: Scarberia, Ontario, Canada Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	awesome thank you!

07-12-2014, 02:05 PM	#7
epik1 Zilvia Member Join Date: Mar 2011 Location: Scarberia, Ontario, Canada Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	sorry maybe cause I'm a noob, I don't understand clearly. are you saying that the third nipple shouldn't be used ? All I've read about the third nipple, is that it used to be used for carbon canister.

07-12-2014, 02:12 PM	#8
quickdiversion Zilvia Junkie Join Date: Aug 2012 Location: nj Age: 38 Posts: 341 Trader Rating: (4) Feedback Score: 4 reviews	There are a lot of emissions and canisters removed from these motors. So most l likely no.

07-12-2014, 07:09 PM	#10
quickdiversion Zilvia Junkie Join Date: Aug 2012 Location: nj Age: 38 Posts: 341 Trader Rating: (4) Feedback Score: 4 reviews	Grammer is fine. You obviously do not understand a lot about this motor. Which is fine.

07-12-2014, 07:30 PM	#11
epik1 Zilvia Member Join Date: Mar 2011 Location: Scarberia, Ontario, Canada Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	"So most l likely no." I was referring to that. do you mean "most likely no, you can't use the third nipple" or "most likely no, you're good to use the third nipple" I'm still learning lol

07-13-2014, 11:16 AM	#13
epik1 Zilvia Member Join Date: Mar 2011 Location: Scarberia, Ontario, Canada Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	thanks guys. Okay, so after some tracing and stuff I ended up with this : Left Nipple: FPR + MAP sensor Right Nipple: Boost Gauge + Boost Controller "BOV?". It goes to my HKS EVC "vacuum block"