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Scion tC 1G Forced Induction Turbo and supercharger applications...

how man pounds of vac am i supposed to be running???

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Old Sep 16, 2007 | 04:57 PM
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Rizzie's Avatar
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Default how man pounds of vac am i supposed to be running???

i got the treadstone kit, with the vac line in the bov its running at 26 and with the line out its at 10. where is it supposed to be and if its a problem what should i look for. we found no leaks aaaanywhere
Old Sep 18, 2007 | 08:39 AM
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I believe around -9 or so
Old Sep 18, 2007 | 01:18 PM
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Default Re: how man pounds of vac am i supposed to be running???

Originally Posted by Rizzie
i got the treadstone kit, with the vac line in the bov its running at 26 and with the line out its at 10. where is it supposed to be and if its a problem what should i look for. we found no leaks aaaanywhere
uh, -9 is not right. at idle u should see -21 to -19 with no vac leaks. if ur between 0 and-18 at idle there is a leak.
Old Sep 18, 2007 | 01:43 PM
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good looking out...
Old Sep 18, 2007 | 05:26 PM
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between -18-22 inches of Hg
Old Sep 19, 2007 | 06:03 AM
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somtimes at idle my needles start shaking... is that normal or does that mean there is a leak?
Old Sep 19, 2007 | 06:35 AM
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Mine does it every once in awhile also.
Old Sep 19, 2007 | 01:32 PM
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Originally Posted by ignitionr34
somtimes at idle my needles start shaking... is that normal or does that mean there is a leak?
That could be a number of different things:

poor ignition mapping
dentonation
vac leak
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