Quote:
Originally Posted by Frank Lee
I doubt breathing through the crankcase is more aerodynamic (less lossy) regardless of valve style. Imagine the flow path through the crankcase vs that of an intake system.
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It depends. If overall mass flow through the engine (valvetrain, baffles, possibly the block itself) is low, then there might not be that much in drag loss, even though the engine internals would not be aerodynamically shaped.
In any case, I am not about to pay $400 for a solenoid poppet valve and a $10 microcontroller. That particular aspect of the Dyno-whatzit is what makes me lean toward classifying it as unicorn fodder.