My biggest gripe with the Ecoboost is the rev hang associated with rotating mass. so decided to pull out the balance shaft. 18lbs of weight reduction and hopefully Quicker revving too. Should be, considering the balance shafts rotate at 2x engine speed. There’s also a hypothesis that the balance shaft drive contributes to thrown rods since most all of the thrown rods are #3. The drive gear for the balance shafts is pressed onto the crank adjacent to the #3 rod. Who knows if it’s true but good not to have in the back of my mind anymore as a potential culprit.
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Will do the flywheel one day but this is cheap and also increases oil capacity by a quart which is nice too.