Choda

iTrader: (1)

Ferocity02 thank you for testing it. I am very surprised that the gauge didn't show any vac at idle and that exactly what we need. Our engines need a strong vac. Sounds like we need to use the manifold for outta boost vac. Still wonder if doing a 2 part system where in boost it pulls from the turbo inlet.

I agree, always use a check valve. bomba makes really nice ones.

LS1TRUCKGUY

iTrader: (7)

i just have my drivers side valve cover ran to a vented catch can. its very simple and it works. a system set up to pull a vacuum on the crank case would be more involved, but it would be better.

Noah Burns

iTrader: (5)

anyone know what that threaded bung in the 4.8L valley cover is for?

Ferocity02

iTrader: (59)

Isn't that for the oil pressure sensor?

damianldaigle

Yes, that is the oil sensor bung, there is a spot on the front to hook a vacuum line. Mine came with a red boot on it.

oakley6575

iTrader: (5)

That is only on the LS6 valley cover. Stock truck engines don't have the pcv port on the front.