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catch can question?

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Old Dec 14, 2006 | 09:47 AM
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Default catch can question?

I figure out how to make one from doing a search, but wasn't able to find out one info. What do I do with the stock black box that behind the motor? Also I'm not understanding on how to install the lines also. If someone can explain and show me some picture that would be GREAT! Thanks

mod
b18c1
jdm itr piston about 11.5 comp.
dc 4-1 headers
intake
exhaust
FPR and 190 lph fuel pump
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Old Dec 16, 2006 | 12:32 PM
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What do you need a catch can for?

Here is everything you need to know about catch cans: http://www.honda-tech.com/zerothread?id=1199935
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Old Dec 18, 2006 | 12:11 PM
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Originally Posted by Däs Schmoo
What do you need a catch can for?

Here is everything you need to know about catch cans: http://www.honda-tech.com/zerothread?id=1199935

Thanks. I was told it would be a good idea since I'm running high compression, and it will help prolong my motor. Are you saying it's not necessary for me to have one?
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Old Dec 18, 2006 | 02:11 PM
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Yes High compression engines work well with catch can..It help's crankcase ventillation. I'm running the endyn catch can on my 12:5:1 cr gsr and I'm running with the black pcv box removed two fittings off the back of the block to the endyn can. Everything else is capped off.
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Old Dec 18, 2006 | 02:22 PM
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Originally Posted by OnesloDXhatch
Yes High compression engines work well with catch can..It help's crankcase ventillation. I'm running the endyn catch can on my 12:5:1 cr gsr and I'm running with the black pcv box removed two fittings off the back of the block to the endyn can. Everything else is capped off.
you forgot to mention what your running as a vac source

-Luke
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Old Dec 19, 2006 | 12:26 PM
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Originally Posted by lkailburn
you forgot to mention what your running as a vac source

-Luke
The Endyn can doesn't use a vaccum source. It has two hoses connected to fittings at the back of the block that go to the can with an open breather element on top of it.

A catch can isn't completely necessary in your case but it wouldn't hurt. The stock PCV system should be efficient enough.
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Old Dec 19, 2006 | 12:36 PM
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Originally Posted by Däs Schmoo
The Endyn can doesn't use a vaccum source. It has two hoses connected to fittings at the back of the block that go to the can with an open breather element on top of it.

A catch can isn't completely necessary in your case but it wouldn't hurt. The stock PCV system should be efficient enough.

PCV system is not all that effective without vacuum sources. thats like asking vapors/oils to JUMP up and out of your block.

-Luke
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Old Dec 19, 2006 | 12:39 PM
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Originally Posted by lkailburn
PCV system is not all that effective without vacuum sources. thats like asking vapors/oils to JUMP up and out of your block.

-Luke
So how do the pressures relieve themselves when boost pressure is present?

You would be surprised at how high the crankcase pressure can get and it doesn't need anything but a place to go to remove itself from the crankcase.

On another note, vacuum pressure draws those nasty gases back into the engine to gunk things up and burn in the combustion chamber.
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Old Dec 19, 2006 | 06:32 PM
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Originally Posted by Däs Schmoo
So how do the pressures relieve themselves when boost pressure is present?

You would be surprised at how high the crankcase pressure can get and it doesn't need anything but a place to go to remove itself from the crankcase.

On another note, vacuum pressure draws those nasty gases back into the engine to gunk things up and burn in the combustion chamber.
running it to the ground is better then nothing, but you can't argue that an added vacuum will not improve its performance. thats why people spend so much on air vacuum pumps JUST for their pcv system.

for boosted apps i recommend a two vac source setup. a friend and i came up with a pretty solid design with two vac sources. a slash cut in the exhaust for high load/boost times,(under light load, a slash cut provides next to NO vacuum.) and the IM for low load/vac times. check valves in each vac source line to prevent positive pressure going into pcv system.
i don't like running a slashcut in preturbo intake because then your running the junk through your turbo decreasing its life.
as you know, stock honda system uses IM as a vac source and just reburns all the vapor and oils, no harm done. if your concerned you can add a small inline filter on the IM vac source line.

here's a pic




das das schmoo aprooove? haha

-Luke
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Old Dec 19, 2006 | 07:02 PM
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I somewhat agree. The slashcut method is pretty effective and IMO, should be the only vacuum source on a boosted application. I would never route anything to the intake manifold because I have seen the shit that builds up in there. The one major flaw I see with that setup is retaining the stock black box and PCV valve. One should use block fittings to eliminate that bottleneck.

IMO, the Endyn setup is more than sufficient on everything except high horsepower setups. I would really like to see your theory tested in the real world to see if it can perform any better.
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