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Old 01-22-2022, 03:21 PM   #2
GTO_Gregory
 
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Drives: 2016 Camaro
Join Date: Oct 2017
Location: Texas & Uncle Sam's Choice
Posts: 103
I think the better catch cans use metal baffles, or a steel mesh for long life.
I doubt the catch cans reduce any crank case pressure as you are not creating additional vacuum.
I ran a GZMotorsports Sportsman Vacuum pump on my LS2-402 and there is a noticeable difference. With a vacuum in the crank case the engine revved must faster and easier. The system has its own vented catch can and twenty laps at Texas World Speedway with 0W-30 oil filled up the catch can.
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