Anyone with an opinion on this catch can? - RX8Club.com



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Old 05-10-2017, 11:49 AM   #1
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Anyone with an opinion on this catch can?

Just curious if anyone has used this particular ebay can. If so, good or bad?

LINK

Please don't turn this thread into a "all catch cans are the same" "no they're not" or a "you get what you pay for" thread. I'd love to buy a mishimoto or a saikou michi, but I have to triage how I'm spending my money here.

Thanks in advance.
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Old 05-10-2017, 11:57 AM   #2
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It look similar to the ADD one I have. But I used AN fittings and custom push lock hose I made myself. The ADD is a high quality well machined product.

ADD W1 Black Baffled Universal Aluminum Oil Catch Tank Can Reservoir Tank Ver.1 | eBay




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Old 05-10-2017, 12:03 PM   #3
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I think it's the same. They've both got the level check stick and the removable baffling, so it's damn close anyways. I'm planning to shove some steel wool inside the baffling just because I feel like media will accumulate much more than baffles alone.

Satisfied? Does its job? How often you empty it out?
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Old 05-10-2017, 01:07 PM   #4
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The steel wool is unneeded. My car is boosted so it's not the same but I don't have to empty it that often. But I don't daily the car either. But it will depend on the health of your engine.
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Old 05-10-2017, 09:38 PM   #5
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Had a can on a Subaru that had steel wool inside - within two months it was just full of rust.

Catch cans knock out a lot of water vapor as well as oil. Unless the filling is stainless, better off without.
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Old 05-10-2017, 09:49 PM   #6
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is it worth putting a catch can on a stock car for track days?
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Old 05-11-2017, 12:51 PM   #7
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I am 99% sure all the wool I have is stainless (otherwise I'd have specks of rust embedded in my woodworking projects) but I better double-check. Good advice.

Can't answer on track days, but my '05 is stock and I've definitely got some oil pooling in the accordion tube. Probably there from the previous owner, but still. The throttle body looks clean, at least, but my SSV sounds a little gummy so I don't want to fool around with it.
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Old 05-11-2017, 08:38 PM   #8
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Quote:
Originally Posted by yudkib View Post
I am 99% sure all the wool I have is stainless (otherwise I'd have specks of rust embedded in my woodworking projects) but I better double-check. Good advice.

Can't answer on track days, but my '05 is stock and I've definitely got some oil pooling in the accordion tube. Probably there from the previous owner, but still. The throttle body looks clean, at least, but my SSV sounds a little gummy so I don't want to fool around with it.
Most steel wool available these days is Chinese carbon steel, that is oiled to prevent rust. Look at those woodworking projects under a microscope, and you may see broken steel bits stuck in the wood, with some rust formed on them, before the finish was applied. Chinese steel wool is brittle, compared to the old stuff, and generally unsuitable for fine woodworking pursuits.
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Old 05-11-2017, 08:44 PM   #9
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I have two big boxes, each with a spool of stainless steel wool. Let me know if you need some.
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Old 05-12-2017, 10:21 AM   #10
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I only bought the good stuff, but think I only have up to #0 on hand. After that I usually sand.

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Old 05-19-2017, 11:53 AM   #11
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Warning!
Do not install a catch can unless you really know what you are doing. Most are poorly engineered hack jobs; only purpose is to sell you something pretty. Most suffer from various design & implementation faults such as poor gaskets, media fibers which can get sucked into the engine, etc.

Read here
http://www.conceptualpolymer.com/Documents/pcvor.pdf

I found the above when researching catch cans for my Vette (lots of oil in the intake) and ran across a number of horror stories about cheap oil catch cans and damaged engines.

FWIW. YMMV.
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Old 05-19-2017, 04:11 PM   #12
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You don't have any skepticism that the PDF says there's only one good catch can and wow wouldn't you know it, it just so happens its available on the website you're reading this on?

I'm not saying there's no valid concerns or that the product isn't likely to work better, but it's still a sales deck. There is functionally zero way to make an absolutely perfect catch can setup, because either you're using a breather and releasing metered air to atmosphere or you're plumbing it all up and risking a vacuum leak since its not a solid hose. It cannot be done exactly perfectly every time, just varying degrees of "better than letting oily garbage gunk up my motor".

I mean, really, if you don't want to risk a vacuum leak then don't own a car...
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Old 05-19-2017, 04:40 PM   #13
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It's just a catch can and this one is well machined, I have been using mine for years. Of course the install can be mucked up and I would not use the cheap hose provided. But a catch can is not going to screw something up on it own.









Last edited by 9krpmrx8; 05-19-2017 at 04:48 PM.
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Old 05-22-2017, 09:05 AM   #14
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The Vette had a lot of oil in the intake: significant blowby from an engine which was intentionally built a bit loose. I installed a CP catch can with appropriate sized vac lines in a nice cool location. It caught a couple ounces of crud every thousand miles.
I've elected not to install a can on the Rx8. Those who do can at least be aware of all the extra fittings on the vaccum side; the potentially poor design, seals and hoses of many cheap kits; and the potential issue of media fibers from the 'filter media' in most catch can systems.
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Old 05-24-2017, 10:01 AM   #15
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Fair enough. For what it's worth, as I understand most RX-8 owners put it on the oil filler neck, which shouldn't be subject to the same demands as a PCV based system. They had a dealer-installed vent kit that just went back to the crankcase to do the same thing but it sounds like a ******* pain. Vacuum is still vacuum so I get it but we're also talking right after the ****** huge air filter on this thing.
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