Far better than arguing about politics or religion with the same results; In the end no one changes their mind.

 

You have commented twice in the thread now without giving YOUR opinion. What is it?

 

Catch cans only catch a small portion of the oil but I still don't want to have more oil go in. I've seen cars at 200k miles with and without catch cans so it doesn't hurt either way. Crazy power has been made with a catch can so it isn't hurting the engine to have it. Having ported 100's of manifolds, I can always tell who runs a catch can and who doesn't.

There is nothing I've typed here that I haven't typed before on the many threads on this topic over the years. People rarely change their mind so I don't get involved with the threads and they tend to get locked and disappear. Politics, religion, and catch cans.

 

Appreciate the response; I don't remember seeing your thoughts before.

 

In may case, I chose to install a catch can because I have a Magnuson 'Heartbeat' PD style supercharger, and I just don't want oil entering and 'gunking' up the supercharger's rotors and charge-air coolers.

 

You can tell who does and doesn’t because the valves are dirty or?

 

Because people copy each other. Because catch cans don't decrease engine power, so it still looks like a good idea.

That is the main argument I encounter: " I added a catch can and the engine didn't lose any power, so why not use one?"

I never said catch cans reduce power. I typed a whole lot of **** but that wasn't one of them.

I only pointed out that catch cans will ruin the engine. That they make increase oil aspiration to the cylinder. That they will cause deposits and lead to eventual engine failure.


You can make more power by disabling the PCV system and simply running a breather- Why? Because crankcase gas dilutes intake charge with spend vapors like CO2 and H2O that are useless to the engine. PCV isn't an engine power increaser, it is an engine longevity and lifespan increaser.

I'll give you two quotes or excerpts from an engineer and tuning literature 'guru'
-Greg Banish
-Calibrated Success, Inc.

From this thread
https://www.corvetteforum.com/forums...post1606134728


And literature by our retired 'boost engineer'
https://www.theturboforums.com/info/...rs-101.378656/

The information is embedded within the understanding that, if you do not measure and set the crankcase pressure to a negative number, it doesn't matter what type of system you have or think you have, it might not be working as intended to remove contaminants which leads to deposits and eventual failure.

If we install a tire we check the tire pressure. If we modify the fuel system we check the fuel pressure. If you've altered the oil pump/system you check the oil pressure. You may also be aware of coolant pressure. If you modify the intake system add forced induction you measure the boost pressure. And so forth.
All of these systems have a pressure value associated to them. They all must be measured when performing modifications. For example you would never put on a new tire or new fuel regulator without measuring and setting the fuel or tire pressure. Imagine the consequences of doing something so foolish.

Well the same situation applies to the crankcase pressure. You modify the engine, the PCV system, the air filter (air filter is part of PCV system), you MUST MEASURE the crankcase pressure and set the crankcase pressure properly. Otherwise... consequences (read above quotes)

 

I have had a catch can contents look just like that. I had just installed a brand new engine. There was a head gasket issue leaking a little coolant into the oil. Once that was resolved, the contents of my catch can have looked like "oil".

 

Because of the amount of oil in the intake manifold that, at times, literally drips out. Manifolds from cars with a catch can don't have this.

 

That's what I've seen too and on some it bakes on.

 

A catch can can catch what a catch can can when a catch can can catch catch.

Sorry, had to do it.