I just got my Elite Engineering catch can. The instructions on their website don't show where to connect the intake hose.
Has anyone put one on the ls76 intake manifold wit l92 heads? Or on an ls3?
Elite hasn' responded back to m yet
TIA
GM

 

It seemed wierd, but I connected the top port of the can to the vally port and the bottom port on the can to the intake port. I will post pics tonight.Thats all I could tell form their website.

 

I wasn't sure about the valley port, as it seemed the intake hose went to a tube that ran along the top of the head behind the coil packs.
GM

 

The PCV is in the same position on the LS3, different fittings and hoses but the same locations.

The PCV is a "U" shaped hose that runs from the valley cover to behind the throttle body. On the LS2 it was just a piece of formed hose, on the LS3 it's a manfactured wrapped hose with fittings on the ends.The "make up air" still runs from the passenger valve cover to in front of the throttle body.

 

Still not clear. Do you connect the top hose to the metal tube running along the top of the passenger side coil packs? (It's originally connected to the bellows connected to the throttle body)
And is the bottom hose on the catch can connected to that location?
Still nothing from Elite.
GM

 

After 200k or more on 5 ls motors. I still wonder Why the catch can?
I check my TB blade and it's clean on the inside,No problems with oil in the intake ever. You guys must run them way harder than I do.

 

Take the throttle body off, and with a clean white paper towel stick your fingers in the snout as far as you can. If there is no oil on the towel your good & have no need for the can, but when we do head swaps the piston tops & valves have a ton of carbon buildup from the oil drawn in.

 

The line out of the lifter galley connects to the lower fitting into the can. the return line to the manifold come out fron the higher fitting. Sounds backwards but it's not. Actually most of your oil doesn't come from the PCV system. It comes from the valve cover breather line just out of the cover. The rockers kick alot of oil into the line and it's pulled into the intake tract. I tried a numbers of combos to trace this down. First just the PCV was connected to the can and after 3000 miles only 1.5 oz of oil was in the can. Conclusion, the PCV system works good. Second I connected the valve cover line that runs into the bellows. And after only 500 miles the can was full of oil approx 8oz. Conclusion,that's where the oil is comming from. So I tried this; I ran a line from the top of the oil fill cap, pluged the line out of the valve cover and was now pulling from the highest point instead of the lowest point reasoning that oil doesn't go up hill. Checked my can after 500 miles and had no oil to speak of in the can. After 3000 miles I had only the amount of oil that was in the can from the PCV. Most guys have flamed me for closing the system completely. Saying that my seals will get sucked in. Yet after 10,000 miles of this mod I have no oil leaks. MY intake tract is dry, and no oil consumption. and thats with a forged stroked LS3 427 with .055 piston to cylinder wall clearences. My engine builder Charlie Williams @RPM motors and LPE and Katech said that's what they do. So If it's good enough for them then it's good enough for me, and it works

 

Anyone have pix of an LS3 set-up?

 

Well, Elite Engineering shows a photo of one on an LS2, and the bottom hose CLEARLY goes to the bellows connector on the throttle body.
The top hose looks like it's connected somewhere at the front of the passenger's side rocker cover, but you can't tell because the photo was taken with the hose running under the "beauty cover". You can't see just what it's connected to.
I STILL haven't heard back from Elite ( are those guys on vacation?)

GM

 

The catch can goes between the fitting on the valley cover to the fitting BEHIND the throttle body, this this is the PCV line, it keeps most of the oil out of the intake manifold.

The line from the passenger valve cover to BEFORE the throttle body is just make up air. Unless something is wrong you shouldn't have any oil on the throttle blade from this line.

 

I'm still waiting for Elite to respond. Their schematic and their pictures show different things. The pictures on their site show the bottom hose connected in front of the throttle body.
GM

 

It's the same for an LS2,LS3,& LS7 For the pcv hook up. Go on line they have the diagrams for both types. LS1, and then the rest LS2,LS3 etc.

 

Sounds like it makes perfect sense to me.

 

Here is a write-up I did on my catch can install.

Hope it helps....

http://forums.corvetteforum.com/show....php?t=1957423

 

Thanks for a great write up, I ordered the catch can at the beginning of week and this will be very helpful

 

Yes, done correctly & looks good.

 

That's It! Elite should put this on their website.
I also removed the MAP sensor to get easier access, and it had oil on it!

Thanks!
GM