Has anyone been able to document a drop in knock retard after installing a catch can? My ls1 car had knock retard with the Oem setup. I added a catch can system built with some parts store stuff and cut that right down to zero. Had two filters and a catch can.
Can would have quite a bit of oil every so often. Filters would get misted enough to mess flow up and I could tell they needed changed because the way the engine ran.
No, Catch can should have zero direct correlation to KR on an EB motor. Directly it is helping keep intake valves clean, which improves airflow, so could have an indirect affect on KR, but nothing that is obvious on logging.
I have 100’s of hours using HPTuners logging on my 16 Edge Sport before I traded it in a month ago. I installed my JLT on it, and never saw any difference. On EB, a few things make the most difference, Manifold Charge Temp(Cool Air, upgraded IC helps), Octane(93 sees less KR, but Octane Boosters help too like Boostane and some off the Counter), good Gas, and Ethanol. Really want to help your KR’s, run a little more Ethanol, or get an Ethanol tune. The additional Octance, and evaporative cooling go a LONG way in preventing Knock.
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