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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 11-10-2013, 06:37 PM   #1
5280VertDET
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S13 sr20det vac lines- Will this work, if not then why? (Mucho searcho)

After many searches, on multiple forums, over the last 3 days and reading the FSM finding what I thought was what would work but I am confused and stuck.

Many "vac line" threads are dead ends (w/dead links and pictures) or "oh, never mind I fixed it (and no solution is posted)" or they don't include all the components below. The FSM is nice for factory setup, but useless to me for this set up. I feel like this is a very common setup and hopefully a solution will come and someone can use this in the future!

Heres the run down:
S13 Redtop
Isis Manual Boost Controller (has one in and 3 "outs")
Boost Gauge
No Emissions Canister
CX Racing "Greddy" style BOV
Stock T25

My free time is limited, so I will be hooking up the vac lines and hopefully will be able to start it up by turkey day, so bare with me...

Word version:
FPR to Upper, Smaller, Left Throttle Body Vacuum in.
WasteGate to MBC "in"
MBC "out #1" to Upper, Larger, Right Throttle Body Vacuum in.
MBC "out #2" to cabin Boost Gauge.
BOV vacuum line to Lower, Left Throttle Body Vacuum.

Here's the Picture:



So, almighty engine wizards, can someone confirm or offer a solution to this setup?

Thanks!
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Old 11-10-2013, 07:17 PM   #2
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That is the improper set-up!

The upper right nipple goes to BOV, you can tee off this also for the boost gauge.

The bottom left is to be capped off.

You need to make a nipple fitting on your intercooler pipe, (hot pipe preferably). The. You have you're MBC in between the actuator, and hot pipe fitting (boost source).

Make a boost source!
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Old 11-10-2013, 07:50 PM   #3
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Quote:
Originally Posted by Dboyizmlg View Post
That is the improper set-up!

The upper right nipple goes to BOV, you can tee off this also for the boost gauge.

The bottom left is to be capped off.

You need to make a nipple fitting on your intercooler pipe, (hot pipe preferably). The. You have you're MBC in between the actuator, and hot pipe fitting (boost source).

Make a boost source!
Thanks, so...

Upper left to FPR
Upper right to BOV & T'd to the BG
MBC from WG to nipple on hot pipe?

Is there a particular reason to cap the lower left nipple?

Edit: also, is there a reason why I can't read boost from the MBC?
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Old 11-10-2013, 08:55 PM   #4
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Quote:
Originally Posted by 5280VertDET View Post
Thanks, so...

Upper left to FPR
Upper right to BOV & T'd to the BG
MBC from WG to nipple on hot pipe?

Is there a particular reason to cap the lower left nipple?

Edit: also, is there a reason why I can't read boost from the MBC?
Yes!
Correcto my friend.
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Old 11-10-2013, 08:58 PM   #5
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The lower left is used for charcoal canister. Since you don't have one, its not needed. Just cap it off.

That lower left nipple is not a boost source, you cannot use it like one.
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