The Definitive OCC thread; aka Oil Catch Can, Oil/Air separator

nope no fi. yea all i want them to modify is the drain and`make it a 1/2 threaded connection so i can out a hose bib on it so i can drain it easy
 
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was wondering about the 5/8 hose and the 1/2'' hose.

Im assuming that all fuel lines is rated with inside diameter?. now much hose would i need for the 5/8?

Also if i mount it where jumbo has it, will the stock 1/2 hose reach the catch can or would i have to buy a new hose?
 
TeejG35 said:
The OP states that a dual OCC is better for performance, but the original design is better on price. Why would a dual OCC be better performance wise?
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i went and bought the original design. 2 inlets one out. Im assuming the dual is better because it has its own separate individual suction line for better flow / collection.
 
Viperi said:
i went and bought the original design. 2 inlets one out. Im assuming the dual is better because it has its own separate individual suction line for better flow / collection.
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Partially true - the two cans are better because technically air flows in both directions on the vent side and only one direction through the PCV side. The two can setup preserves this function because each side of the valve cover has it's own can. When you are running forced induction (where vacuum turns into boost pressure) the two can setup is better at handling the different pressures. The one can setup is fine if the car never sees boost. I've actually kept that Saikou can and installed it in a Mazda. The FX gets to keep the dual can setup because turbo!
 
Old thread but better than starting a new one. Couple of questions here.

1- Who sells catch cans with two inlets? All the ones I found were just single.
2- do you modify the PCV valve on all setups or just the last one with the breather & cap both vacuum?
3- If I went for a dual catch can setup. Is there a point of breather anymore?

I'm looking at this setup. It says inlet & outlet. But still have the breather. What's the point?
Can the outlet be used as anothe inlet for the second valve cover?

http://m.ebay.com/itm/141295761388?nav=SEARCH
 
Well, if that works for you. You can have him custom to your specs such as what angle you want the inlet/outlet to point to what size hose those inlet/outlet takes.

I had one made by him for my FX35. What I did was, I identified where I would like to mount it, custom the angle of the inlet/outlet, size of the inlet/outlets, and which way the mounting bracket goes.
 
Thread bump..

Not an expert in this department..
After looking at the 350z style Saikou OCC, does this only address the passenger side vent ports?

the occ link
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+1 on the hose type. And what would be the best configuration for my qx70 5.0? I hate the fact that oil is being dumped into my brand new cars manifold....
 
Often hoses are in the kit you can buy....... or you can use like samco silicone or Goodridge stainless/flex hoses but read members buying them at household/hardware stores. I think the heat won't be an issues for many types of hoses. Butt for some estatics is more inportant then for others.
 
I run fuel hose on my catch can since it will hold up to the petroleum. I've heard that heater hoses are meant for water and will eventually fail when exposed to petroleum products. If you want to get pretty, you can run steel braided as Ray said. But unless you're running a lot of boost, it's not that necessary. AN fittings would be really pretty but entirely unnecessary. On my BMW, the catch can (which is designed specifically for the car) doesn't even have hose clamps, just slip on hoses and that car sees 16+ PSI sometimes.

I would recommend against running the clear plastic hose that comes in most catch cans these days, it will collapse. I think it's the same stuff that they sell at Home Depot for aquariums and fountains, at least it looks the same. It's usually folded and collapsed when they ship it to you and I personally wouldn't run anything that is flexible enough to be folded in half because it will collapse under enough vacuum. Plus it's not rated for the heat.
 
Reviving this...where can I get the fuel hose you guys are speaking of above? Also, any pics on where the hoses go, I'm not sure which hose I
need to disconnect and run to the catch can? I know it's easy to do just not sure which hose i'm supposed to look for. Thx for any help!
 
Fuel injection hose.
You disconnect the one hose that connects the PCV valve to the vacuum port
Then get two fuel injection hoses (->)
PCV valve -> OCC -> Plenum vacuum port

MAKE SURE YOU KNOW THE DIRECTION OF YOUR OCC.
 
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