Oil catch cans: worth it?

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09-25-2003, 04:35 PM

#21

BigMeanBull

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[QUOTE]Originally posted by fperra

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09-26-2003, 03:52 AM

#22

VR WHAT

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Do you REALLY need one for each? One isn't good enough?

Thanx,
Chris

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09-26-2003, 03:59 AM

#23

fperra

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You really don't need any, but one is better than none and two is better than one.

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09-26-2003, 04:01 AM

#24

fperra

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If you are only going to do one and you are turbo'd or SC, put it on the front vent.

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09-26-2003, 04:02 AM

#25

fperra

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And hope your PCV valve doesn't stick open under boost. If you put in the KrankVent, you won't have to worry about this.

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09-26-2003, 04:39 AM

#26

VR WHAT

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Well I'm not SC'd.......................yet, but thanx for the help

Chris

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09-26-2003, 06:23 AM

#27

VR WHAT

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I'm not a mechanic, nor do I have extensive motor knowledge. So please don't flame me. But will you loose any vacuum pressure with two catch cans? Or one for that matter? And if so, will it affect the motor or performance? I want to get two catch cans.

Thanx

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Chris

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09-26-2003, 09:10 AM

#28

Legal Bill

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Quote:

Originally posted by fperra
They keep oil from degrading the octain rating of your gas, varnishing the inside of your throttle body, intake manifold and the topside of your intake valves,. When you put in the catch can you should also put in the KrankVent. Check out my post at http://forums.s2ki.com/forums/showthread.p...threadid=151254

I read your thread and I read the web site descrition of how it works and I am still at a loss to understand how this thing can create negative pressure in the crank case. I think I understand that it is a one way valve and I understand that a one way valve won't let the atmospheric or manifold pressure back into the crank, but how does it create negative pressure???

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09-26-2003, 09:28 AM

#29

Legal Bill

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Quote:

Originally posted by fperra
They are definitely worth it. If nothing else, you need to keep the oil out of your intake as it degrades the octane rating of your gas. I'll be installing two this weekend; one on the PCV valve side and one on the forward valve cover vent. These will work in conjunction with the KrankVents. I'm using Jaz catch cans. Read about them at these links:

http://reganrotaryracing.tripod.com/catch.htm

http://www.volvospeed.com/Reviews/jazbreather.htm

http://cjsupra.kendra.com/PCV-Can.html

They are cheaper than Greddy and a better design.

If I am understanding the Jaz can correctly, it is really a breather to the atmosphere. Therefore, it would be an illegal modification of the car's pollution control system for state inspection purposes and an illegal modification of the PCV system for SCCA Autocross purposes. The Greddy and Cusco are sealed units that maintaim the circuit to the intake and catch "vapor" while seperating liquid. Please let me know if I am wrong about this as I like the look of the Jaz unit.

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