[Klink]

My car has 27k miles and never had a catch can... Guess it's too late now huh?

I just installed mine at 23k. Never too late.

 

[hansman]

I have to empty my catch can every month. There is about 2- 3 tablespoons of oil each time. I put one on my hellcat at 400 miles back in October 2020, and believe this is the single thing EVERY V-8 Challenger, Charger owner should do.

 

[Browneye]

The Dodge Challenger/Charger models are not the only cars that benefit from a catch-can - it's all the rage on the chevy truck forums as well.
In years gone by, the crankcase vent went to the ground.
Then later Dodge had a little plastic 'pcv valve' stuck in a grommet in the valve cover.

 

[Browneye]

I finally remembered to empty mine when the engine-bay was cold - about 1200 miles since installing the Speedlogix one.
Probably about an ounce and a half of very stinky thick oil. No, I really don't want that feeding back in through my intake plenum. Seriously.
Unscrew the catch can at the bottom, dump it out, wipe it out. Some black stuff at the bottom. Yuck.

 

[Kurtshemi]

My Billet catch can was installed by my dealership before I took possession of the car.
I'm a hard core believer in catch cans.

 

[Unicorn]

I have 4 of them and LOVE how they come off in under 2 minutes for those trips to the dealer................

I use JLT because they where first company to come out with one I think...............

 

[Unicorn]

Back in the day PVC was washed off by the raw gas going thru the intake. NOW the intake is air only an d over time it does build up and does delute the incoming charge.

this all came about on the 2003 Cobra 4.6 blower intercoolers get plugged by the oil blow by..............

 

[Cuda340]

I finally remembered to empty mine when the engine-bay was cold - about 1200 miles since installing the Speedlogix one.
Probably about an ounce and a half of very stinky thick oil. No, I really don't want that feeding back in through my intake plenum. Seriously.
Unscrew the catch can at the bottom, dump it out, wipe it out. Some black stuff at the bottom. Yuck.

It's not just oil. It also contains gasoline, water and acids. Nasty stuff.

 

[Browneye]

When positive crankcase ventilation (PCV) was created, cars had a carburetor on an intake manifold. So gases and any oil blow-by went in along with your fuel to burn. Now with a direct-injection motor, there's nothing to dilute or cleanse this vapor coming into your intake. So the pictures posted up-thread of caked ports and intake valves is the result. Yeah, it may take many thousands of miles to make any difference, but all that caked-on residue just isn't what you want for a free-flow intake port. This is really what the catch-can is all about. Do you NEED one? No. Do you WANT one? I do.

 

[Pioneer4x4]

Because every other engine on the planet does it and is fine. It is literally less than 1 drop (actual measurement) of oil per 10 miles in each cylinder. How much oil do you think gets burnt from internal blowby and cylinder wiping? And has anyone measured how much oil a catch can doesn't catch? Sure, they definitely don't hurt, no argument there (when emptied, other than maybe people that might just dump it some where). But does that miniscule amount of oil vapor (it is still a vapor when going into the intake, not condensed like that) cause any problems at all, nope.

 

[GoFastBrakeHard]

Because every other engine on the planet does it and is fine. It is literally less than 1 drop (actual measurement) of oil per 10 miles in each cylinder. How much oil do you think gets burnt from internal blowby and cylinder wiping? And has anyone measured how much oil a catch can doesn't catch? Sure, they definitely don't hurt, no argument there (when emptied, other than maybe people that might just dump it some where). But does that miniscule amount of oil vapor (it is still a vapor when going into the intake, not condensed like that) cause any problems at all, nope.

Um, after 100,000+ miles, yes it can cause problems. It will coat your intake valves and other intake parts sooner without a catch can. And the harder one drives the more of these unwanted deposits end up in the engine, and the larger bore engines tend to have more blow-by. I have a large bore and drive hard.

I do agree that you don’t need one. But I also believe many cars benefit from them by keeping the top end of your engine cleaner.

I understand it doesn’t catch all of it. In a perfect world there would be zero return vapors going back to the intake, but that’s not possible with the current design.

If you don’t see the logic of keeping crud out of your engine then we will have to agree to disagree.

 

[Cuda340]

It always surprises me is that some Challenger owners, who are constantly looking for ways to maximize the power of their engines, often overlook catch cans. While it's true that an oil catch can will not add any power or make any cool noises, it will prevent a loss of power, as miles pile up, due to the PCM retarding the timing to prevent pre-ignition.

Simply stated, a catch can will ensure you are always running the most power possible by having a cleaner intake tract free of oil.

 

[Frank Julian]

I had one before I installed my whipple. Now I would have to run hoses everywhere so, I just vent the make up air side to atmosphere. I wish I could remove the pcv valve and vent the other side to atmosphere as well or run a vacuum pump to evacuate the vapors from the crankcase.

 

[ChallengerMine]

What catch can brands are the best?

A UPR one I found has options that allows your to add a drain plug, drain line kit and petcock (UPR Signature Series). This seems like a great can add-on and would allow for more capacity. Extra O-rings are also available.

It also appears that UPR has a better filter (requiring more frequent draining) and component design.

Another question, what happens if you don't empty the can?