Eagle02

iTrader: (20)

Ok, so a couple days ago I put up some ignorant post asking about PCV and vac routing for a turbo'd LS1. Granted I didn't search much. However, after researching quite a bit, I still didn't come up with anything that really answered all my questions in one place.

So as repayment for my non-searching-sins, I've created a diagram that I think answers the vac and pcv questions once and for all. If its wrong, please let me know and I'll update it accordingly.

Eagle02

iTrader: (20)

Anybody?

TT350

looks good, that is a lot of work thanks for taking the time.

MECHAM

iTrader: (4)

lmao...yall make it soooo difficult

https://ls1tech.com/forums/forced-in...69-pcv-fi.html

Boosted One

iTrader: (6)

Do you have a filtered fresh air inlet for the engine anywhere?

Eagle02

iTrader: (20)

In that diagram no. Everything I've seen so far suggested that a sealed system would be better for scavenging oil from the turbo... no?

Boosted One

iTrader: (6)

I would be more concerned with pulling air in from somewhere you don't want to, like around your seals in a high vacuum situation. If you have any type of restriction on you air filter (gets dirty) then your vacuum will go way high under boost. If your oil drain back line is designed properlly then you won't have a problem anyway. If it were me I would take off the line from your ls6 valley cover and put a filter on it.

Eagle02

iTrader: (20)

So can I ask... does the compressor housing vac fitting produce vac or boost @ WOT? I'm getting conflicting info on this since drawing the diagram.

Boosted One

iTrader: (6)

Compressor housing fitting is Boost only. You need to be on the inlet side of the compressor, then you will see vac only.