Flatirons Tuning Tech Tip - AOS Vs. Catch Can - So what is Blow By? The Analysis is in!

If you have been staying up on our Air Oil Separator Vs. Catch Can video series, you know that one of the core questions that we have was what exactly is blow-by? When we went to the track with our 2003 WRX project car, and had the issue with our catch-can install, we did manage to collect a lot of PCV Blow-By, and so we sent it to Blackstone Labs for analysis.

That information is finally back, and in this video we will go through what we found, and what we think that it all means.

If you are running a catch-can, or especially and Air Oil Separator, this is information that you need to know.

Thanks for watching, and stay tuned!