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SC12 vacuum lines

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SC12 vacuum lines

Postby Xyrath 86 » Sat May 02, 2009 9:32 pm

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Can anyone tell me what the purpose of these vacuum lines are? I recently put a supercharger on my 20v AE86 and just blocked them off assuming they were for the air-bypass (which I am not using on this setup). I have since been told that they should be plumbed into the intercooler piping to 'equalize pressure' or something.

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Anyone know for sure what the purpose of them is and what I should do with them?
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Postby KinLoud » Sat May 02, 2009 11:10 pm

Hi dude - I'm sure that they are to equalise the pressure inside the supercharger gearbox with the pressure inside the supercharger itself.
This is to stop oil being forces out of the gearbox through the seals I think.

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Postby Rick » Sun May 03, 2009 12:19 am

In a factory setup the brown VSV connects the supercharger gear case and the end seals to the intake system before the throttle body, the ECU controls the valve.

Its to minimize the pressure difference between the end seals and the outside air.

Toyota wouldn't go to the trouble of installing them on the supercharger for no reason so I would plumb them back up.
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Postby Mr Revhead » Sun May 03, 2009 11:35 am

both of the above are spot on 8)
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Postby Xyrath 86 » Sun May 03, 2009 1:02 pm

Ah ok, sounds like it would be a pretty good idea to plumb them up then :P.
Thanks guys.
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