Oil separator anyone? - ZR-1 Net Registry Forums

Paul Workman · 10-06-2013

For those that might be interested, I picked up a very nice Moroso oil separator. It is a class act piece of equipment. It is a closed cylinder, billet aluminum, about 2.5" in diameter, x about 5" long, and comes with the inlet/outlet barb fittings at the top, the separator filtering (metal) is installed, and has a petcock and barb connector on the bottom for draining, and a billet aluminum mounting bracket. Very nice machine work.

Price was $150+tax; ready to install - just need hoses and done!

P

Schrade · 10-06-2013

If this oil isn't removed with this device, where does it end up?

I'm guessing it will foul somewhere?

Paul Workman · 10-07-2013

Quote:

Originally Posted by Schrade

If this oil isn't removed with this device, where does it end up?

I'm guessing it will foul somewhere?

Oil, not separated, makes its way to the combustion chambers, fouling plugs, carboning up the valves, contributing to knock, plugging the MAP sensor hose (leading to other seemingly disassociated issues with idle and AF mix...) Not good. The LT5 (among other open deck motors) is prone to a little more crankcase pressurization - hence oil blow-by - than some others (tho some LS motors also have oil separators for the same reason: keeping oil out of the cylinders).

I'll post a pic of the Moroso unit later.

P.

Dynomite · 10-07-2013

Quote:

Originally Posted by Paul Workman

Oil, not separated, makes its way to the combustion chambers, fouling plugs, carboning up the valves, contributing to knock, plugging the MAP sensor hose (leading to other seemingly disassociated issues with idle and AF mix...) Not good. The LT5 (among other open deck motors) is prone to a little more crankcase pressurization - hence oil blow-by - than some others (tho some LS motors also have oil separators for the same reason: keeping oil out of the cylinders).

I'll post a pic of the Moroso unit later.

P.

Paul...last time I checked my Elite Oil Catch Can after several 1/4 mile runs and some additional miles (I think it makes a BIG difference if you stand on it) I had maybe 1/2 inch of oil in bottom of Oil Catch Can. So it works

Racinfan83 · 10-07-2013

Two quick questions - does this setup eliminate the PCV valves - and if I don't run the car hard like some of you guys do (racing, etc), is it even necessary?
It does look cool - but I'm trying to keep the stock look for now...

GOLDCYLON · 10-07-2013

Quote:

Originally Posted by Racinfan83

Two quick questions - does this setup eliminate the PCV valves - and if I don't run the car hard like some of you guys do (racing, etc), is it even necessary?
It does look cool - but I'm trying to keep the stock look for now...

No it does not eliminate the PCV valves. It captures oil before it gets into the plenum etc.

Schrade · 10-07-2013

Quote:

Paul...last time I checked my Elite Oil Catch Can after several 1/4 mile runs and some additional miles (I think it makes a BIG difference if you stand on it) I had maybe 1/2 inch of oil in bottom of Oil Catch Can. So it works

Is there too much oil to be filtered by some sort of added-in filter membrane? Maybe for those who don't race, like FrankU says above, and do 'hammer down' once / twice per outing, only enough to get new fuel through the secondary injectors - will THAT make for enough oil to justify a catch can?

So in the existing intake hardware, where will I see excess oil when [IF] I [ever] pull the intake / plenum ?

And since it's (+) crankcase ventilation, how does it purge, to the intake vacuum? good snappics too there...

(where is emissions routing diagram in FSM - anyone know offhand here? ) IS AIR ACTUALLY FORCED INTO THE CRANKCASE, for fumes purge??? Or is it a mis-nomer?

Hmmm... positive air pressure, into the induction.

Forced-Oil Induction?

Dynomite · 10-06-2013

Quote:

Originally Posted by Schrade

If this oil isn't removed with this device, where does it end up?
I'm guessing it will foul somewhere?

It ends up in plenum and you burn it........but it gums up the intake more than necessary

-=Jeff=- was one of the first I think Oil Catch Can Photo

Here is what I used on both a 90' and 91'.

See Item #5 of LT5 Added Systems

See Details for Oil Catch Can Installation

The PCV hose connected under front of plenum (Vacuum source) is connected using SS braided hose to an Oil Catch Can external to the engine which Oil Catch Can is connected using SS braided hose to the dual PVC valves hard line located at the rear of the plenum. The Oil Catch Can is located on the drivers side inside wheel well (using a small channel ground and drilled to conform to the inside fender well as a spacer).

The Oil Catch Can used here is the Elite Engineering Oil Catch Can
(I use wing nuts for quick Catch Can Maintenance)

efnfast · 10-07-2013

Is there a down side to doing this? Other than the fact that GM didn't do it originally.

GOLDCYLON · 10-07-2013

Quote:

Originally Posted by efnfast

Is there a down side to doing this? Other than the fact that GM didn't do it originally.

in short no..

10-06-2013	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Oil separator anyone? For those that might be interested, I picked up a very nice Moroso oil separator. It is a class act piece of equipment. It is a closed cylinder, billet aluminum, about 2.5" in diameter, x about 5" long, and comes with the inlet/outlet barb fittings at the top, the separator filtering (metal) is installed, and has a petcock and barb connector on the bottom for draining, and a billet aluminum mounting bracket. Very nice machine work. Price was $150+tax; ready to install - just need hoses and done! P __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

10-06-2013	#2
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: Oil separator anyone? If this oil isn't removed with this device, where does it end up? I'm guessing it will foul somewhere? __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

10-07-2013	#9
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,492	Re: Oil separator anyone? Is there a down side to doing this? Other than the fact that GM didn't do it originally.

10-07-2013	#5
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Re: Oil separator anyone? Two quick questions - does this setup eliminate the PCV valves - and if I don't run the car hard like some of you guys do (racing, etc), is it even necessary? It does look cool - but I'm trying to keep the stock look for now... __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]