Ready for the oil catch can...

[GOLDCYLON]

Originally Posted by LORDVDR

What is the purpose of the catch can?

Darth it helps remove excess oil from the plenum area, TB area etc. The PVC system is inadequate and oil tends to pool inside the plenum causing all sorts of problems. This way its captured and returned to the motor where it belongs. GC

[XfireZ51]

Originally Posted by secondchance

That is not a bad price. Filter alone (you need fittings also) goes for $25-30.
Thanks for the info.

Came complete with fittings and hose. I bought some 90* elbows for it, but the straight ones worked fine. Used aluminum tubing for the PCV fitting, then slid 3/8" hose over top.

[secondchance]

Actually, another option is to plug the intake at intake plenum and drop a aluminum tube at "F" connector down to bottom of the chassis and let it vent. Would that create any problem?

[-=Jeff=-]

Originally Posted by secondchance

Actually, another option is to plug the intake at intake plenum and drop a aluminum tube at "F" connector down to bottom of the chassis and let it vent. Would that create any problem?

And leave it open?

then the PCV will not work as it should

Also the catch can on that line will not catch everything

the intake tubes going directly int he front of the cam covers, will become crankcase exhaust ports at WOT

[secondchance]

Originally Posted by -=Jeff=-

And leave it open?

then the PCV will not work as it should

Also the catch can on that line will not catch everything

the intake tubes going directly int he front of the cam covers, will become crankcase exhaust ports at WOT

Wouldn't venting occur at "F" connector extension?
Capping off at intake would maintain the vacuum.
Am I missing something?

[Aurora40]

Originally Posted by secondchance

Actually, another option is to plug the intake at intake plenum and drop a aluminum tube at "F" connector down to bottom of the chassis and let it vent. Would that create any problem?

The intake system pulls a vacuum on the crankcase. If you had an open tube, there would be no vacuum. The only way it would vent is pressure in the crankcase.

[secondchance]

Originally Posted by Aurora40

The intake system pulls a vacuum on the crankcase. If you had an open tube, there would be no vacuum. The only way it would vent is pressure in the crankcase.

Just out of curiosity, wouldn't this pressure relieve itself through PCV valves and into the atmosphere even without help from vacuum?

[jonszr1]

not really the pressure would start to cause problems like blowing seals etc. part of the prcblem is the crankcase area is very small. the pvc problem was what caused the zr1 to be pushed back a year . the book the heart of the beast explains it way better than i could

[Aurora40]

And here it is all done!







I noticed the idle would drop a bit futher, so I suspect this restricts the PCV flow a little bit compared to when it was straight pipe. I suppose that shouldn't be surprising.

For now I used rubber vacuum hose. I am wondering if that will prove to be not so great when exposed to oil. I'm worried it may soften up and be prone to collapse. It fits super snug though, no need even for clamps. The PCV should never see boost, right? Only vacuum? The supplied line was big, so I'll look into some oil-proof narrower stuff.

I also thought more about pouring the oil back into the engine. Since the PCV system is intended to remove blow-by from the crankcase, I'm thinking the oil will be loaded with gas and such. So I think it's probably best to just pour it out.

Also, man I wish the fittings weren't copper/brass. Silver would have been a lot better. I may try painting them black.

Bob,

I felt the same way about the fittings and bought mine on Ebay from a company that sells all the Gardner Westcott Company fittings; very high quality stuff. Great job and I think the CCA catch can is great; mounting to the brake booster sure made it an easy job.

http://www.zr1netregistry.com/forum/...ighlight=catch