Ahhhhhhh! Ok that makes perfect sense. Do you think this kind of leak would show up on a compression test, or would have to be a leakdown test?

(Sorry to hijack your thread Chad.... I've been chasing this problem down for a year now!) I would think to solve your issue, you could use an AccessPort or whatever to up your idle RPMs, like you mention, to compensate for the lack of inertia in the flywheel.