Quote:
Originally Posted by Joeggernaut
With infinite cam profiles the cam profile is optimized to virtually eliminate pumping losses. Since it is 99% optimized the need for a wai is basically negated besides the slight minimal increase in flame speed (DI helps with this more). A cai though is still beneficial. Thoughts on this?
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Uh, ya lost me here.
I was under the impression that we had a throttle body which limited the amount air which would be let into the intake manifold, thus, a manifold vacuum, the amount of energy required to pull the air past the throttle plate is where the loss occurred. It takes power to draw in the air, the power comes from the engines, thus a loss. You can't tell me it is an effortless process to draw air across the throttle plate.
Your love affair with valve management systems is misplaced in my estimation, you have seriously confused 2 different processes going on in the engine.
Also, you claim hydrogen is present in the air due to the humidity that is "Always there". Here in the north, when temps drop low to freezing, there is very little to no water vapor in the air, at its most it's 4% with 2% being common on warm summer days most places. Understand however, this vapor does NOT contribute elemental hydrogen to the combustion equation since it is already attached to oxygen thus being water. It will be a factor on a small scale in its ability to remove heat & such, but the effect is tiny, and unless you're running a top fuel dragster, really isn't worth discussing.
Anyone else wanna talk these points through?