Wastegate plumbing

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Dec 10, 2017 | 09:32 PM

Bbcpoweredz28

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Wastegate plumbing

I’ve been looking everywhere on how to plumb my vacuum lines for the wastegates. I got a great deal on somePrecision units so I don’t have any paperwork. I’m running twin S366s with twin gates. Need a basic plumbing diagram or walk through to just run gate pressure for now. It’s a brand new build from the tires up so I don’t want to lean on anything to hard yet. Yes I looked at the sticky but all the pics are gone and didn’t really see any descriptive posts the didn’t need the pics to be deciphered.

Thanks in advance.

Dec 10, 2017 | 11:10 PM

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Go from your pressure source (compressor) and tee off to the bottom port of both gates. That’ll get you “spring pressure” and the lowest boost level you could achieve with whatever sprIngs you have.

Dec 11, 2017 | 09:51 AM

Bbcpoweredz28

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Ok so anywhere pre throttle blade to avoid the gates seeing vaccuum. Leave the top port to atmosphere of cap it off?

Dec 11, 2017 | 10:10 AM

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Quote:

Originally Posted by Bbcpoweredz28

Ok so anywhere pre throttle blade to avoid the gates seeing vaccuum. Leave the top port to atmosphere of cap it off?

Yes. Some go pre intercooler, some post. I’m right off my compressor housing and it works well. If no line is connected to the top, leave it open. If you cap it you’ll create a closed space in the dome and the air trapped in the dome won’t be able to escape when the gate needs to open and you’ll drive the boost higher than intended.