[Cautionary tale]

Originally Posted by PalmerGA

FYI... a catch can doesn't benefit your transmission (A8). It benefits your engine whether it be a V6 or V8.

yea I had caught the phrase true manual transmission on first mishimoto thread and got confused.... never heard of a catch can until I got here,lol... I guess it's more of a wise idea in a high performance vehicle, but I guess if I talked to a gm engineer he would say no... they have all got this tom hanks cast away "I have created fire, behold" mentality,lol

[Capricio]

You can get lost in all the contradictory information on the internet regarding catch cans. ...and then if you decide on a catch can, even more contradictions on one vs two cans, sealed vs vented, etc. Clearly there were some issues with the early LS1 that led to the LS6 valley cover having a nozzle of it's own. Also consider the catch can included with the new camaro is a design change that acknowledges a change was useful. For all GM's thorough testing, there is no testbed like production before they will grudgingly make a design change midstream.

I've tried a couple in the past that never seemed to catch much and I still had oily residue in my intake. Some claim to be far more effective than others, which is probably the case, but just can't bring myself to spend $500 or more on a cylinder with some steel wool inside.

On my forced induction build, I intend to use a dual can vented setup with large hoses and -an fittings to keep velocity low. I think most aftermarket catch cans are too small for the volume of air a large V8 crankcase can produce. The bottom line is if it catches a significant amount of oil, then you probably need it. Sadly, you have to try it to find out for yourself.

[Cautionary tale]

Originally Posted by Capricio

You can get lost in all the contradictory information on the internet regarding catch cans. ...and then if you decide on a catch can, even more contradictions on one vs two cans, sealed vs vented, etc. Clearly there were some issues with the early LS1 that led to the LS6 valley cover having a nozzle of it's own. Also consider the catch can included with the new camaro is a design change that acknowledges a change was useful. For all GM's thorough testing, there is no testbed like production before they will grudgingly make a design change midstream.

I've tried a couple in the past that never seemed to catch much and I still had oily residue in my intake. Some claim to be far more effective than others, which is probably the case, but just can't bring myself to spend $500 or more on a cylinder with some steel wool inside.

On my forced induction build, I intend to use a dual can vented setup with large hoses and -an fittings to keep velocity low. I think most aftermarket catch cans are too small for the volume of air a large V8 crankcase can produce. The bottom line is if it catches a significant amount of oil, then you probably need it. Sadly, you have to try it to find out for yourself.

if they design a good one, I guess only variable is the way u drive,lol

[PalmerGA]

Originally Posted by Cautionary tale

yea I had caught the phrase true manual transmission on first mishimoto thread and got confused.... never heard of a catch can until I got here...

Me neither, but I've had them on my previous Camaro (2012 LT) and my current one (2013 SS). Despite what some may say as to their worth, I'm a believer. Just check what they "catch" between oil changes and you will be too.

[bbrown450]

FWIW installed an Elite Can on my C7 (same engine) and every oil change I had about (4) shot glass full at the minumum of oil that was destined to be re ingested and potentially add additional coking to valves ...just made sense to me and darn easy to install. My experience ...not an endorsement

[Mishimoto]

Originally Posted by PalmerGA

Me neither, but I've had them on my previous Camaro (2012 LT) and my current one (2013 SS). Despite what some may say as to their worth, I'm a believer. Just check what they "catch" between oil changes and you will be too.

Originally Posted by bbrown450

FWIW installed an Elite Can on my C7 (same engine) and every oil change I had about (4) shot glass full at the minumum of oil that was destined to be re ingested and potentially add additional coking to valves ...just made sense to me and darn easy to install. My experience ...not an endorsement

Thanks for the input guys! Although we still have some evaluation to complete, the factory AOS setup is probably fairly efficient. That being said, this system does not address the PCV circuit, which we've found to pass a significant amount of oil into the manifold. Below is an image of our collection within a time-span of 1100 miles on our SS.



We are still putting miles on our SS and will report back when we empty the can a second time.

Thanks
-John

[mikeSS]

Originally Posted by Mishimoto

Thanks for the input guys! Although we still have some evaluation to complete, the factory AOS setup is probably fairly efficient. That being said, this system does not address the PCV circuit, which we've found to pass a significant amount of oil into the manifold. Below is an image of our collection within a time-span of 1100 miles on our SS.



We are still putting miles on our SS and will report back when we empty the can a second time.

Thanks
-John

I agree that carbon build up/oil in the intake does happen. GDI engine or not. I also believe the PCV system is one of the leading problems.

Where i always disagree or question is the rate at which this happens.

You posted a picture of a decent amount of oil at only 1k. So at 20k or 50k miles your intake valves should have a CRAZY amount of build up on them. You have have MASS amounts of people getting worse MPG, less power, and probably even failed motors. at only 20k miles. why would GM even warranty or design a engine like this?

thats what i dont understand.

[Mishimoto]

Originally Posted by mikeSS

I agree that carbon build up/oil in the intake does happen. GDI engine or not. I also believe the PCV system is one of the leading problems.

Where i always disagree or question is the rate at which this happens.

You posted a picture of a decent amount of oil at only 1k. So at 20k or 50k miles your intake valves should have a CRAZY amount of build up on them. You have have MASS amounts of people getting worse MPG, less power, and probably even failed motors. at only 20k miles. why would GM even warranty or design a engine like this?

thats what i dont understand.

Good points Mike. Keep in mind that all of this oil will not end up attaching to the valve. Some will coat the internal surfaces of the manifold and some of it will be burnt in the combustion chamber. Our goal with this kit is to reduce valve buildup as much as possible, it certainly will happen over time on just about any DI engine.

The amount we collected within 1K miles was very similar to other DI engines we've tested. We would prefer that this fluid does not reach the manifold, which is the reasoning behind our catch can kit. We are still putting additional miles on our prototype kit and will report back with results from our next check.

Thanks
-John

[mikeSS]

Originally Posted by Mishimoto

Good points Mike. Keep in mind that all of this oil will not end up attaching to the valve. Some will coat the internal surfaces of the manifold and some of it will be burnt in the combustion chamber. Our goal with this kit is to reduce valve buildup as much as possible, it certainly will happen over time on just about any DI engine.

The amount we collected within 1K miles was very similar to other DI engines we've tested. We would prefer that this fluid does not reach the manifold, which is the reasoning behind our catch can kit. We are still putting additional miles on our prototype kit and will report back with results from our next check.

Thanks
-John

well that makes sense.

[JCRhea]

Originally Posted by Mishimoto

Thanks for checking out our catch can thread! Any modern engine can benefit from a catch can system, especially DI-equipped vehicles. The lack of port injection further accentuate the valve buildup concern.

A catch can can definitely extend the life of your engine, improve reliability, and aid in power retention over time. We definitely recommend installing one!

-John

Should I be concerned with voided warranty? My dealer seems to think so. Thanks.

[SSTony]

Catch can will not hurt the engine. It can only help. The inly thing that hurts is how much these things are being sold at. These things should be closer to $100 than $200