Catch Can Install

[macca_779]

Looks fine


iPhone 4

[MPRSV8]

Hi All,

What's everyone's thoughts on the Elite catch cans? Also, i see everyone is running plastic lines, could you run braided for a cleaner look?

Matt.

[bush_basha]

if you search elite catch cans you'll be reading forever, lol. there a great can and yes you could run braided line to make it look neater

[chocco]

+1 for Elite, I have one on each car.

[motorin on]

I ran braided line (supplied with D1 Spec can) and it collapsed under suction,ended up going to 3/8" rubber transmission hose

[HSV Listy]

I have been having some issues with excess oil going to the catch can. Average is about 600 ml per meet so maybe 20 laps at speed on the circuit.
After the last meet the idle is sitting high after giving it some which has never happened before. Once I do a restart it goes back to normal idle.
After some thoughts to help the issue.
It's a vented set up and have been a small issue for years but manageable with duel vents and taping up the dipstick.
Since the new engine it has got worse now several issues are soothed and I can race at speed again. (Non engine issues) . It's a fully rebuilt engine so it a stock ls1 with heads and cam so nothing over the top.

Maybe some ideas even those with 8tb set ups






Passenger side



Drivers side

[Benno25]

Hi Listy,
Do you still have the one way check valve that came on the stock PCV system hooked up somehow? I'm not sure how the LS1 PCV system was hooked up as the LS3 is a little different.
Mine has a breather in place of the oil cap to draw fresh air in. The outlet from the valley cover then goes through a sealed catch can and then a vacuum line to the back of the hurricane. I've never had any issues, however my car doesn't do sustained high revs all the time like yours.
Cheers
Benno

[HSV Listy]

The PVC is on the passenger side cover and the hose comes off that. Photo posted as above

Just looking and it seems different to stock as the passenger side oil take off from the pcv goes straight to the catch can. Standard set up it would go through the throttle body then to the can (correct me if wrong) would this affect the vent system

Not sure what the go is running a 8tb is

Both hoses from the valve covers, go straight to the can. No going via the intake.

Also in corners would there be enough GeForce to get liquid oil to go high enough in the valve covers to actually send oil down the tubing into the catch can.

Also does going hard around corners cause a siphon affect to draw oil back to the can. Surly 600mm oil in 30km hard driving in corners would not be possible for vapour only

[HSV Listy]

The back of the 8tb has three outlets, one goes to the brake one to the normal vacuum line for ac etc and the third has a hose but is plugged off
Not sure if I am supposed to use that. Any thoughts

[smash69]

The outlet in the front of the drivers side cover is actually for fresh clean 'make up' air, which flows into the engine when using the standard PCV system. This is supposed to draw from in front of the throttle plate on a standard throttle body, to make up air that is drawn out via a correctly functioning sealed PCV system.
The outlet at the rear of the passenger cover is a PCV outlet (early LS style), which should flow thru a PCV valve then into the throttle body, behind the throttle plate (vac).

In your setup, you are probably filling the passenger rocker cover, at least to a point, via high revs and g force, and vacuming out liquid oil straight to the can. This is also common with PD supercharger setups using the rocker cover outlet. Your current vacuum seems to be only supplied to the can by the suction of the fresh air make up on the drivers rocker cover.

Can you switch to a later LS6 valley style PCV outlet? These are baffled better, and work better.

I'm no expert with 8tb setups, but I would run dual cans, sealed system.

Valley PCV outlet (ideally), or passenger outlet to PCV valve to Catch Can dirty side then Catch can clean side to Vac port.
Drivers side rocker port to 2nd catch can then to low vac filtered air.

This is similar to what I run on my PD charged 402. Before I set it up this way, I was running similar to yours, and was pulling 3-400mls in a couple hundred k's, now significantly less.
Ditching the passenger side cover PCV for a valley setup should yield the biggest difference.
By the way, Saikou Michi in the US custom makes catch cans to your specs, I got my dual cans, for well under 200 bucks, delivered.

[HSV Listy]

Great into. The info I was looking for. I will get me head around the above and go from there

[IJ.]

Had to totally redesign the system on my L98 as the E-Force deletes the Valley PCV...

[smash69]

Great into. The info I was looking for. I will get me head around the above and go from there

No probs. When I had my issues, I had to do a lot of research, as there seems to be a limited understanding of correctly functioning PCV systems by many.
The system is not purely designed as a vent, it should actually vacuum out the combustion by-products as well, thereby keeping your oil healthier and so on.


PM me if I can help.

[cronic]

Hey guys, sorry to dig up an old thread for my first post but I figure it's probably best to keep all the info in the same thread for other readers. Loving these forums just signed up recently and have spent hours and hours reading.
Anyway I've got a VZ SS with an LS1 and I'm in the process of doing a few things to it, one of which is that I want to fit a catch can before I fit my OTR.

I have read through this thread twice now, and think I understand the setup, but I want to check that I am understanding correctly as the VZ looks a bit different to some of these pics.

Anyway I just whipped these up in paint, I'm still not sure if I want to fork out $200+ for an elite catch can, so was thinking of getting one of the cheaper vented ones off ebay.
Can anyone offer a recommendation? I am not sure if either one is superior to the other? I don't care about the legality it won't be the first thing I get pulled up for..

Also just realized I did a shit job numbering em but it will do, sorry if it's harder to follow.

Sealed can:
2) Crank case -> 5) Can IN
6) Can OUT -> 1) Intake manifold
3) Rocker cover breather -> 4) Filtered intake (or into my OTR once fitted which has a hole drilled)


Vented can:
1) Rocker cover breather -> 2) Can IN
5) Cover up as no longer needed
3&4) Anything need to be done with these? Or OK as is?


I found this youtube video showing install process for a vented can, and they just run 1 hose as shown above and that's it, is it that easy on a VZ?
https://www.youtube.com/watch?v=0sIMNq_dK6Q

Cheers guys.

[macca_779]

You got it right in the first pic. And leave 3 and 4 alone