Having it floating around as a vapor is not helping anyone, but let’s move on to the real reason. Remember we want the oil to stay in a nice liquid form for our oil pump pickup. It also helps in keeping the aeration of the oil down. Now how much is actually gained by that……could be argued little to almost nothing at all, but it does help. This will cut down on the air resistance of those pieces. For starters then we want the moving components of the engine ( pistons, rods, crank, valve train) to be moving in an area that doesn’t have much air in it. It is understood that the engine is a machine that works on combustion, so the compression and ignition of fuel and gas, but one must understand that making this event as efficient as possible is what nets us horsepower and torque. SO HOW DOES proper crankcase and valve cover venting increase power?
Ok ok, well then explain why a motor will make more power when the only modification done is adding a dry sump system? Again maybe you are well read in your engine understanding and engineering so you respond with “this is due to the fact that the motor doesn’t have windage loses as the crank doesn’t have to run through the reservoir of oil found in the pan”, but again it would be argued that that has more to do with cutting down on the aeration of the oil and frothsation of the oil than it has to do with a horsepower gain. Now many of you are probably already saying “ now hold on, they do the dry sump so that they have proper lubrication during high g acceleration events”. Obviously big money race teams know this hence all the dry sump systems you see. It’s not that the owners of these big motor builds are doing it on purpose, but instead more just a lack of knowledge or understanding how important crankcase and valve cover evacuation is. Why pulling negative vacuum is important to making powerĪ lot of power is being left on the table by many set-ups popping up lately.
The importance of Crankcase and Valve Cover Venting
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