Mishimoto’s 2016+ Honda Civic 1.5L Turbo Catch Can Development - 10th Gen Civic Forum
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post #1 of 76 (permalink) Old 03-31-2016, 05:22 PM Thread Starter
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Mishimoto’s 2016+ Honda Civic 1.5L Turbo Catch Can Development

2016+ Honda Civic 1.5L T Catch Can R&D, Part 1: Design and Fabrication

We have been searching long and hard to get our hands on the new Honda Civic, and the search is now over! A brand new 2016+ Honda Civic equipped with the 1.5L Turbo engine has finally reached our R&D facility, thanks to a very generous owner. One of our first targeted projects is an oil catch can. There are many benefits to equipping a vehicle with a catch can. Modern fuel injection is accomplished by either port or direct injection, the latter used by this Civic. Let’s briefly talk about the differences between the two.

Port vs. Direct Injection
With port injection, the fuel injectors are situated right inside the intake manifold, producing a fuel stream to mix with the air. That air/fuel mixture is shot straight into the combustion chamber through a valve. As the fuel passes through the valve area, much of the debris gets cleaned off – because as we all know, gasoline is an excellent solvent.

Direct injection, however, is the more common approach for new engines. This system places the injector inside the combustion chamber. Here, fuel doesn’t reach the valves as it does through port injection, so the valves don’t get cleaned, which leads to valve deposits. You would think that on a brand new car such as this Civic, valve deposits won’t be an issue, but this debris can accumulate rapidly. The main culprits are the oil and fuel vapors that get vented into the intake via positive crankcase ventilation and crankcase ventilation valves – the PCV and CCV systems. For emissions reasons, these vapors get routed back into the intake, but that is not where those vapors should end up, as they hinder performance and cause buildup. Catch cans reduce the amount of oil your intake tract sees, and it’s beneficial to do this at an earlier stage in the engine’s life as it helps keep your valves clean longer down the road.

Stock System
Now we can dive right into the development of our Civic catch can. Below are some shots of the overall system we intend will use to model our catch can. The stock hoses have been removed and the exposed ports are circled in red.







If you look closely at the above images you can see the two ports without hoses attached; we will use these ports we will use for our catch can. The unattached port on the right is the PCV tube. Check out a few more images below.



That yellow object behind the block is the actual PCV valve. A majority of cars have this assembly located inside one of the ventilation hoses.

Fabrication and Design
Now that we have located our hose connection points for this Civic catch can, which was the hard part, it’s time to begin fabricating a bracket. Our engineers have an awesome tool called a waterjet that uses high-pressure water and an abrasive material to cut almost anything imaginable that they want to design, aided by a computer program. This piece will be made out of steel.





After some cleaning and bending, this bracket is ready to go! We will be using our dual-port baffled catch can with a maximum capacity of two ounces. Our catch can was designed to trap practically all of the blow-by produced that would make its way back to the intake. These cans have internal air diverters to help direct airflow as well as a 50 micron bronze filter to prevent any thing escaping back into the intake. Check it out below!



What’s Next?
We still need to design hoses that will route oil byproduct from the engine to the catch can. Stay tuned for the next update; it will be very soon!

Thanks for reading!
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post #2 of 76 (permalink) Old 04-01-2016, 09:19 AM
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So the Civic catch can is designed to keep the valves clean?
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post #3 of 76 (permalink) Old 04-01-2016, 09:41 AM Thread Starter
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Originally Posted by 4Tires View Post
So the Civic catch can is designed to keep the valves clean?
In a way, yes. The primary goal of the catch can is to catch any oil that tries to make its way through to the intake tract. This can prevent the valves from getting as much debris and keeps them cleaner longer!
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post #4 of 76 (permalink) Old 04-01-2016, 09:57 AM
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some people are saying if it's so important why don't car makers include it right from the factory, which i'm sure some of you are thinking right now, this video delves into more on the catch can system:


when it comes to preventative things like this, you really can't go wrong, a little goes a long way.
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post #5 of 76 (permalink) Old 04-01-2016, 11:52 AM
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Why OEM's don't include an oil catch catch? That's easy...because the owner must periodically empty the catch can! Do you think most owners would do that, or would just let the thing fill up and overflow? Some folks never open the hood. If the can is allowed to overflow, blow up, leak, or whatever, then oily residue would be released into the environment, and the EPA nannies would explode!

Thanks Mishimoto! Is the two ounce capacity enough though? If daily reasonable driving would require dumping the contents monthly, I guess that would be OK. Could a sight glass thing be installed to give a visual clue when it's time to dump?
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post #6 of 76 (permalink) Old 04-01-2016, 05:05 PM Thread Starter
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Originally Posted by 5TAR View Post
some people are saying if it's so important why don't car makers include it right from the factory, which i'm sure some of you are thinking right now, this video delves into more on the catch can system:

https://www.youtube.com/watch?v=3KrSn3BoeLE

when it comes to preventative things like this, you really can't go wrong, a little goes a long way.
Cool content! This is definitely a preventative measure to prolong any buildup on your valves and intake.

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Originally Posted by CivicDuty View Post
Why OEM's don't include an oil catch catch? That's easy...because the owner must periodically empty the catch can! Do you think most owners would do that, or would just let the thing fill up and overflow? Some folks never open the hood. If the can is allowed to overflow, blow up, leak, or whatever, then oily residue would be released into the environment, and the EPA nannies would explode!

Thanks Mishimoto! Is the two ounce capacity enough though? If daily reasonable driving would require dumping the contents monthly, I guess that would be OK. Could a sight glass thing be installed to give a visual clue when it's time to dump?
The can we are using within this kit is our compact baffled unit, which is designed without a sight glass. We've found that this catch can offers the most efficient separation, which is why it is used within all of our direct-fit kits. When designing this product, we found the addition of a sight tube or dipstick was not aesthetically pleasing. We were looking for a clean, factory-like catch can.

Fluid drain intervals should be relatively easy to determine. We recommend checking the level of the can after 1k miles and 2k miles to get an idea of how quickly fluid accumulates. Draining of the can should be conducted once fluid reaches the baffle. Based on our first collection, I imagine this will be between 3,000 and 5,000 miles, depending upon your vehicle use and driving conditions.

Hope this helps!
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post #7 of 76 (permalink) Old 04-02-2016, 03:10 PM
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Most helpful! Between 3k - 5k should be sufficient.
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post #8 of 76 (permalink) Old 04-04-2016, 09:37 AM
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How hard is tit to remove the catch can and put it back in after emptying it? Can it be done by anyone without tools?
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post #9 of 76 (permalink) Old 04-04-2016, 11:55 AM
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Originally Posted by 4Tires View Post
How hard is tit to remove the catch can and put it back in after emptying it? Can it be done by anyone without tools?
Would probably require simple hand tools:

1. Remove both inlet and outlet hoses.

2. Remove catch can from bracket.

3. Unscrew reservoir portion of catch can from upper baffle assembly, empty, and reinstall.
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Last edited by CivicDuty; 04-04-2016 at 12:03 PM. Reason: Removed mention of drain plug...there is none judging from photo
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post #10 of 76 (permalink) Old 04-04-2016, 02:16 PM Thread Starter
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How hard is tit to remove the catch can and put it back in after emptying it? Can it be done by anyone without tools?
It's easy! @CivicDuty pretty much has it down! The clamps and hoses get disconnected, the top gets detached from the bracket and the base gets unscrewed. Then you can pour out the contents of the can. We will go more in detail about how our cans work very soon. Stay tuned!
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