redtop vacuum line hook up help please

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l314ckhe4rt
Posts: 162
Joined: Thu Sep 18, 2008 11:43 am
Car: 240sx

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okay so i finally came to a conclusion that i am stumped on hooking these lines up. i hooked them up several ways and the car still bogs or sputters sometimes. i have fmic and hks ssq bov. how do i hook these up because i have searched and it seems everyone hooks them up differently i need help please. on the thortoe body has 3 nipples 2 on top and 1 on bottom where do each line goes and do i block off one of the nipples????

i want to know where does the waste gate line goes?where does the bov line goes?and the fpr.... does it just get hooked up the the nipple on the upper left?i don't have boost controller or gauge by the way no canister, or segnoid.thanx for the help much appreciated


V8slayr
Posts: 104
Joined: Wed Feb 04, 2009 1:21 pm
Car: 97 240sx

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The FPR should be hooked up to a nipple on the intake manifold itself, after the throttle plate

I have the same BOV and mine is hooked up the nipple on the intake mani. too.

The wastegate should be hooked to a good pressure source on a charge pipe.

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Justin35ll
Posts: 1421
Joined: Fri Oct 17, 2008 6:57 pm
Car: s13 coupe sr20det

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I always see people who post and say block off one of the top nipples. But on mine the bottom nipple is infront of the throttle plate and you can actually see it so that is not a vacuum source.The top 2 can be used for the fpr and the bov.Now since that bottom nipple is before the throttle plate I'm actually thinking you might be able to use that as a pressure source for the wastegate. I'm going to try this on my car tomorrow. If it doesn't work you can always T it off one of the other lines which people will say it's not good to do, but it won't give you any problems. I would do it off the bov line though I wouldn't want to potentially rob any vacuum from the fpr

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dc1984
Posts: 276
Joined: Mon Nov 14, 2005 2:44 am
Car: 93 240sx/98 180sx blacktop sr20det :RIP/ 93 jeep grand cherokee

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there is a boost nipple that can be bought that is tapped into the a silicone coupler on ur IC piping, i used the one that connects the turbo itself to the IC piping. since it is pre throttle it will be just boost and no vacuum so u wont have to worry about any possible damage to the actuator. also, u wont have to run another boost line from the other side of the engine.as for the others, cant say for myself if one of those doesnt have vacuum as im not home and cant look to see, but one could go to ur BOV and the other to ur FPR. i presonaly prefer not to tap anything into the FPR incase if something on that end brakes or pops off while driving it could cause a lean mix and engine damage so if u need to tap into anything for a boost gauge, id do it off the line for the BOV.

http://www.frsport.com/Turbo-Q....html

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l314ckhe4rt
Posts: 162
Joined: Thu Sep 18, 2008 11:43 am
Car: 240sx

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hey thanks for the info guys. so let me make sure this is right:

one line from the upper left nipple goes directly to the fpr. no teesthe other upper right line goes to the bov. no teesand the waste gate line goes to a nipple on the coldside of the ic pipe???

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Justin35ll
Posts: 1421
Joined: Fri Oct 17, 2008 6:57 pm
Car: s13 coupe sr20det

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Well if you have a nipple on your ic piping then yes use that for a wastegate pressure source, but in some cases people don't have those nipples so they will tap in their own. If they don't do that you can run it off of a vacuum source tee'd to the bov, but then you will run vacuum to the waste gate actuator which might not be great for it. Though that's what I do and it works fineI would go try that bottom nipple as a wastegate source right now, but it's pouring so I'm not taking my car out

edit - well I tried using the bottom nipple as a direct wastegate pressure source and it works great.
Modified by Justin35ll at 1:59 PM 6/27/2009


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