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Oil catch can

Kain

Kain

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I got a few questions about my catch can and how much oil does it pick up.

This is after 850 miles(see pic)
After 3000 it’s maybe triple that witch is not much, plus I would rather drain this and not have it going back into the intake

I am getting a different style catch can and will post link

B3F5CDF7-B864-4DBE-8CF7-DC829A530C79.jpeg
 
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thats a similar amount to what i drain out of the one on my cts-v after 3,000 miles, granted thats an ls2 and not a sbc. ill see if things change after the stroker motor goes in
 
I'm missing something here, why do you need an oil catch can on a healthy motor? Is this an LS thing?
 
usually even the best running of engines have a small amount of oil that go through the pcv, a catch can just gives this oil a place to go instead of letting it run through the intake
 
So why don't you see this used more on "normal" engines? I'm familiar with them on race applications but I just don't see them on everyday type applications.

I also find it pretty interesting that oil is running uphill within the hose of the catch can pictured, it would seem to take a fair amount of blowby to push oil up that hose.
 
https://www.amazon.com/gp/product/B06XK9PTP7/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

This is the one I put on my silverado to try and get rid of some more KR the tuner and I were seeing. I'm running it on the ragged edge of 87 octane (wife's truck she won't run premium) so we were trying every last thing to keep it from blowing up along with colder plugs.

@nvrenuf start searching google for Catch Cans and sit back with some pop corn and beer. It's an epic online battle that's split firmly down the middle between needed and not needed. It's more so an issue with DI engines as the fuel doesn't spray the back of the valves and clean them but even then it's a moot point IMO. BMW had some bad experience with valves getting so coated the intake had to blasted with a media to clean them every so often and now the internet believes that all DI engines are required to have one. I pulled the manifold off of my 14 silverado at a 120k miles and there wasn't much on them beyond an oil staining. Few others have as well. It's one of those feel good things that no one can definitively prove it actually helps or hurts because it's nearly impossible to prove without someone putting two vehicles on a dyno for a 100k miles and seeing which one is doing better at the end.
 
nvrenuf said:
I'm missing something here, why do you need an oil catch can on a healthy motor? Is this an LS thing?
Click to expand...
Lol. Ls thing. Thats funny... take a look at some old late 60s trans am race cars. They all were running catch cans.
 
centexk5 said:
https://www.amazon.com/gp/product/B06XK9PTP7/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

This is the one I put on my silverado to try and get rid of some more KR the tuner and I were seeing. I'm running it on the ragged edge of 87 octane (wife's truck she won't run premium) so we were trying every last thing to keep it from blowing up along with colder plugs.

@nvrenuf start searching google for Catch Cans and sit back with some pop corn and beer. It's an epic online battle that's split firmly down the middle between needed and not needed. It's more so an issue with DI engines as the fuel doesn't spray the back of the valves and clean them but even then it's a moot point IMO. BMW had some bad experience with valves getting so coated the intake had to blasted with a media to clean them every so often and now the internet believes that all DI engines are required to have one. I pulled the manifold off of my 14 silverado at a 120k miles and there wasn't much on them beyond an oil staining. Few others have as well. It's one of those feel good things that no one can definitively prove it actually helps or hurts because it's nearly impossible to prove without someone putting two vehicles on a dyno for a 100k miles and seeing which one is doing better at the end.
Click to expand...


I just put one my chevelle and purposely left if out of my build thread because didn't want to hear about how I didn't need it.

For me i just thought, why do I want all those nasty vapors and oil running back through my engine?
 
beags86 said:
...take a look at some old late 60s trans am race cars. They all were running catch cans.
Click to expand...

Yeah, I'm familiar with catch cans on a race car (mostly drag racing). It just seemed to me that a "regular" vehicle shouldn't have that much blowby.
 
beags86 said:
I just put one my chevelle and purposely left if out of my build thread because didn't want to hear about how I didn't need it.

For me i just thought, why do I want all those nasty vapors and oil running back through my engine?
Click to expand...
And that’s all it comes down to. Some care, some don’t. Do what makes you feel good.
 
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