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Check Valve needed? Valley to blower??

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Old 04-07-2009, 11:54 PM
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Default Check Valve needed? Valley to blower??

Redoing some stuff on my crankcase evac and I need to know the answer to this question.

If I run a line from the intake valley to the suckside of the blower do I need a checkvalve installed?
In my thinking I don't since I don't see how the blower could feed flow into the intake valley since the blower is sucking instead of blowing, lol??

Or is my thinking all wrong, please explain.
Old 04-08-2009, 12:17 AM
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No , but get a catch can inline of the LS6 valley cover and procharger inlet hat.
Old 04-08-2009, 01:03 AM
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No , but get a catch can inline of the LS6 valley cover and procharger inlet hat.
Ok thats what I thought. I am actually an LTx guy, but the same concept.

Let me ask you this, what is the difference between the LS6 Valley and the LS1?? I am guessing the LS6 vents better. Wouldn't mind seeing some pics between the two.
Old 04-08-2009, 04:01 AM
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ls6 valley has a pcv system built into it. the ls1 is just a cover...the pcv is pulled from the valve covers instead
Old 04-08-2009, 05:05 PM
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Right! and the LS6 valley cover has a built in baffle to prevent oil vaper from comming through, i added one to my new forged LS6 motor
Old 04-08-2009, 09:48 PM
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Any pics of that baffle? I am in the process of doing a sheetmetal LTx intake and I am going to have a -10 on the valley and I need to figure out a baffle setup.
Old 04-08-2009, 11:02 PM
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no sorry i dont, its on the underside of the LS6 vally cover, i hear it works ok, but a good catch can should still be used if going FI



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