edge04

iTrader: (9)

I had to remove my throttle body and found all this oil there on my SC LS2. Is this coming from pcv or carnkcase ventilation?

LS1CMR

iTrader: (12)

ive had problems with oil coming from my PCV system, that could be your problem, but i have not had an ls2 yet, only an ls1

SoxXpupPeT

iTrader: (34)

might be from the PCV depends where the PCV hooks up. put a catch can in line and see how much oil she collects

edge04

iTrader: (9)

what did you do about it?

'Trust'

iTrader: (24)

Boost = higher crank case pressure, most likely from your PCV, I'd get a vented catch can on it or breathers.

dlandsvZ28

As Trust suggested you will need a catch can, possibly two. FI cars are plumbed differently than NA cars for catch cans.

For example: ATI blocks the TB inlet from the passenger side valve cover and instead runs the hose from the valve cover to the inlet hat on the intake side of the SC. Under boost it can suck oil from the valve cover into the inlet hat, thru the charger and into the the dual intercoolers or FMIC. You do not want the intercooler(s) contaminated with engine oil. In your case a similar issue is occurring under boost - a catch can or two will catch that oil.

Here is a good read.

https://ls1tech.com/forums/generatio...v-systems.html

And this one for different installations and setups for FI with diagrams.

https://ls1tech.com/forums/generatio...outing-ok.html