Re: Flat tappet oils
Posted: Mon Apr 12, 2010 11:56 pm
Some of those things:
The outside of the rotating assembly in a racing engine is moving at about 100 MPH. Depending on what measures are in place, the rotating assembly may carry 2-3 quarts around with it - this mess is often described as "windage". The engine's oil supply in a wet sump system lives 2-4 inches below this hurricane - even with baffles, screens, and trays to keep it in place, it is pretty easy to pump the sump out, and starve the engine for oil - especially under braking (in a V-8), when the oil from the top of the engine returns to the end away from the sump, through the timing chain and /or the rotating assembly.
The outside of the rotating assembly in a racing engine is moving at about 100 MPH. Depending on what measures are in place, the rotating assembly may carry 2-3 quarts around with it - this mess is often described as "windage". The engine's oil supply in a wet sump system lives 2-4 inches below this hurricane - even with baffles, screens, and trays to keep it in place, it is pretty easy to pump the sump out, and starve the engine for oil - especially under braking (in a V-8), when the oil from the top of the engine returns to the end away from the sump, through the timing chain and /or the rotating assembly.