Quote:
Originally Posted by CoupeSS
Okay, so everyone please explain to the dummy in the room (yes me) what this thing about a catch can is and what direct injection has to do with anything. You are talking over my head.
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Direct injection puts the fuel directly into the combustion chamber. The valves are only opening and closing to move air and by products of combustion. While that is efficient, it doesn't allow for the fuel to keep the plenum and back of valves clean from oil blowby. Thus a catch can becomes very important to catch as much oil as it can to keep the plenum and back of valves clean.