SR20det vacuum mess

[speedrift]

I got a S14 cheap with SR and i cant remember the vacuum turbo, waste, bov and all that. I was going to install a boost controler between what i thought would have been Waste gate ---- Boost controler ---Hot side turbo pipe.

But instead its set up like this? can any one help clairify my mess. as i have had vacuum problems showing off a shitty idle and running rich... This is how mine is. Is this right I cant remember how my S13 was.




I was told it was a S14 black top... the owner didnt know much about the car. He had bought it from Socal, the swap was done at Monster fabercations.. I already spent hours tring to fix tons of "Done wrong"

[SoguRacing]

there will be a nipple on the underside the the throttle body. use that one for the turbo wastegate and intercept that same line for the boost controller solenoid. use the vacuum nipple directly under the fpr for the fpr vacuum/boost source. other than that it looks fine.

[Killa_D]

cool pic lol

[speedrift]

correct way i do believe

[speedrift]

Originally Posted by SoguRacing

there will be a nipple on the underside the the throttle body. use that one for the turbo wastegate and intercept that same line for the boost controller solenoid. use the vacuum nipple directly under the fpr for the fpr vacuum/boost source. other than that it looks fine.

thank you i found that nipple was blocked off. I am going to use the bottom one like you said then one top ones for FPR..

[Ceepo]

i used the top one for fpr and tee'd off that for my vac/boost gauge, then my bov is the other nipple on the top and the wastegate is the nipple under the TB

[Destructodc74]

isnt that the intake manifold for an s13 sr? or did s14 sr come with those also in some year. im trying to figure out if my vacuum lines are lines are all right too but i have an s14 sr. any ideas?

[GMMTC]

The one with the red lines looks correct to me. But does anyone see any issues with doing what I want to do? I was going to T my boost gauge off the FPR line. But I figured why bother if I have the bottom nipple plugged off, I should be able to put the FPR, BOV and Boost Gauge on their individual lines assuming the bottom nipple will work fine for the BOV. The reason I want to use that for the bov is because it's a smaller hose which fits the HKS Bov better. But a friend said the bottom line on his car didn't have much vacuum, is it any different than the top ones, or does that make any sense?

Here is a picture of what I want to do.

[KaminaSan]

Originally Posted by GMMTC

The one with the red lines looks correct to me. But does anyone see any issues with doing what I want to do? I was going to T my boost gauge off the FPR line. But I figured why bother if I have the bottom nipple plugged off, I should be able to put the FPR, BOV and Boost Gauge on their individual lines assuming the bottom nipple will work fine for the BOV. The reason I want to use that for the bov is because it's a smaller hose which fits the HKS Bov better. But a friend said the bottom line on his car didn't have much vacuum, is it any different than the top ones, or does that make any sense?

Here is a picture of what I want to do.

Your BoV will not work on the bottom line afaik, because the bottom one only gets boost, not vacuum, and if I'm correct, your BoV works off of vacuum.

[Sileighty_85]

Originally Posted by KaminaSan

Your BoV will not work on the bottom line afaik, because the bottom one only gets boost, not vacuum, and if I'm correct, your BoV works off of vacuum.

Correct,

The bottom line is useless.

[KaminaSan]

Originally Posted by Sileighty_85

Correct,

The bottom line is useless.

Not completely useless. Like I said, it does have boost, so it works well for wastegate.

That's how I have mine setup, because I refuse to have my FPR teed off with anything.

Although for the BoV, yes I guess it is useless.

[codyace]

Unrelated to the vacuum, but you've got the Fuel going in the wrong side, and you have to recirculated that BOV as well.

It may have been an error in the picture, or just be unrelated...but if that's how it's setup it's wrong.


Advice: always keep your boost gauge on the intake manifold, and the shorter the wastegate source line, the quicker it will respond.

[nicks240sxs13]

im not sure if this is right, but with my s13 sr20
i got the bottom nipple plugged
the top right going to my greddy type-s(knock off) BOV,
and the top left going to my boost/vaccumm gauge, FPR, and my wastegate.

besides the fact that i got compressor surge from my knock off bov it runs fine at stock 7lbs of boost.

if my lines are set up wrong please let me know lol

[s13_rb25]

Lol. i see one prob that i hope you just misdrew, the line coming off of your fuel filter should be your supply line for the fuel, which SHOULD NOT go into the fuel rail on the side of the fuel pressure regulator, the FPR is regulating pressure coming out, so if it is indeed the way you drew it, you might want to switch your fuel lines around. also you should have a 3 way connector that connects three vacuum lines, one from your throttle body, one from the waste gate, and the one from the BOV should all be T'd off together. the other vacuum line goes from the TB straight to the FPR.

[s13_rb25]

This is the pic i drew up for you diagram

[redenblack]

Originally Posted by s13_rb25

This is the pic i drew up for you diagram

where does boost gauge get T'd off?

[nismoman]

Never t off of the fpr line or wasgate line! It can work but increases chances of failure on to critical components. You don't want to run lean or over boost. And you can run the boost gauge off that bottom nipple if you don't need it to read vaccum.

From HeavyThrottle's SRSWAP FAQ:
Quote:
The vacuum lines are simple: 3 lines start at the throttle body. The bottom one goes to the canister, block it off unless you are using the canister. The larger one on top runs to the bypass valve (BOV). The smaller top line tees to the fuel pressure regulator, and runs across the front of the engine to your boost gauge and/or the boost pressure port on your boost controller.

The wastegate gets its signal from the nipple on the intercooler piping. The Apexi boost controller stepping motors go in between the IC piping and the wastegate actuator.

[cotbu]

I'm not knocking anyone, but being around these engines for sometime myself. I see a lot of information that is just used to simplify an install or make money for the installer.

Just look at some of the things they recommend. On the other hand a vet owner would tell you to change, the hoses under the intake manifold, get a oil filter relocation kit and a catch can.

Good catch on the fuel line routing, The Fpr can be t'ed with a boost gauge, and a boost gauge can be used to monitor your fuel pressure. Here's how, set your base fuel pressure, then connect the vacuum line, you're are pulling 38 - 40 inhg, convert and subtract. OK crude, but if you do use your boost gauge, like i do. you would see if there is a problem. AT idle you'd be rich, and see no vacuum, wot there would be no boost, but you should not go too lean, unless you're pushing more than the 20psi or untuned. Realistically you'd have all the appropriate gauges in the car anyway but...
my 2¢

[xiaphin]

Heres my setup. Yah or Nay. My BOV line and FP line are backwards from what Nismoman posted but I remember reading somewhere to use the top right location for FP only. My diagram is for an s13 with boost gauge, boost controller, and recirculation. Going to start my car probably tomorrow. Like to know if this is correct.

[cotbu]

You have no boost source! XD

Those top nipples are just different OD sizes.
Here's a setup that is common, requires an extra Tee fitting. T vacuum line from FRP to boost gauge and boost controller. (I might catch flak for saying that.) Use the bottom port on throttle body for the boost source (WG) and boost controller solenoid.

This is just utilizing the ports you have, you could add a vacuum block or tap for additional vacuum sources.
Anyway, this is how I've routed mine, minus the bottom port since my compressor housing was already ported.

ps the valve cover vent is routed wrong too!

[xiaphin]

for some reason with all this info I still cant picture how my lines are to run. Here's my 2nd attempt. My fuel is ran correctly just didnt change original image. Have catch can also. So either tee off the fpr or bottom nipple for my boost controller solenoid? Whats the nipple on my Apexi intake for?

[cotbu]

Bottom nipple for solenoid, nipple on apexi intake can be capped off or used for bleed port on boost control solenoid.

[xiaphin]

Ok Figured it out. Thanks guys.

[GMMTC]

spring is here, here's my second attempt. I know I should get a closer WG source but I don't have a nipple on my hot pipe yet, that'll be a future upgrade.

[techtonic1985]

Originally Posted by GMMTC

spring is here, here's my second attempt. I know I should get a closer WG source but I don't have a nipple on my hot pipe yet, that'll be a future upgrade.

Does this setup work ??? i need a redo lol

[cotbu]

yes that works

[HellaSexyS13]

i know this thread is old by my TB has 4 ports under it,where do they all go to?

[KiLLeR2001]

[metako42]

Thanks Killer2001. Here's a version that prints a bit better.

[dontxploitme]

sorry to revive the thread but would this set up work?

wastegate - hot pipe
bov - top right nipple on throttle body
fpr - top left nipple on throttle body
boost gauge - lower nipple on throttle body