Ok, I read your article. While I appreciate your effort, it is riddled with inaccuracies. As I mentioned previously, there's very little benefit to having a catch can but if it makes you feel better to have one, have at it. I just feel bad that so many people are duped into buying catch cans based on inaccurate technical info. Not the first useless automotive accessory to be hyped and won't be the last. Luckily, at least this one doesn't actually cause any damage unless it's improperly installed or maintained.
From what Ive studied, it seems that this is unlikely to be a problem for Challenger engines. Catch cans are a decent option for PDI(Direct injection) engines. From what Ive found, Challengers have indirect injection engines. Sent from my iPhone using Tapatalk Pro
I have to dumb this conversation down for myself. IMO oil in the combustion chamber isn't good. May not be bad, but surely isn't good. If oil gets into the combustion chamber either because of leaky valve seals or bad piston rings, the spark plug could fail prematurely. Depending on the engine configuration, the injectors could get clogged or have a poor spray pattern. I think the old saying "an ounce of prevention" holds true for using a catch can.
No need for name-calling here. Plus, he is technically correct if your concern is specifically carbon build-up on the intake valves.
I have a catch can (from JLT) on my '15 Challenger SRT and it collects about 1.0 to 1.5 ounces roughly every 2500 miles. My understanding is that without a catch can, blow-by oil could cause the computer to reduce timing which will rob horsepower. Probably not even perceivable by the famous butt dyno. A buddy of mine wonders if the oil I'm catching should go uncaught so it could act like a lubricant --- kinda like a 2-stroke lawn mower.
Kind of like supporting changing your oil every 3000 miles. Technically no benefit to the engine but doesn't hurt either. Years ago, that was a good guidline but times have changed. Many people that don't have in-depth understanding about their cars rely on others for guidance. Unfortunately, the internet is full of misinformation and it's not always easy for people to separate facts from fiction.
Blow-by is a nasty brew of water, oil, and acids. Before the era of emissions, it was vented into the atmosphere (see crankcase breather cap photo). Engineers knew that it was not desirable to burn it. However, emission laws forced their hand.
I would ask you why you think blow-by could cause the computer to reduce timing? And regarding the 2-stroke analogy, I'd have to say that's a stretch.
