OK Rotor Phasing: position of rotor tip at cap terminal with it "frozen" in place with the timing light like a strobe light would do to people on a dance floor which is what the rotor tip/cap terminal relationship is when the eng fires. Vac can hose removed and hose capped (dont wanna vac leak). The can metal nipple capped or not capped or even the can removed as we are talking only if mech adv changes RP. I say it does NOT, not from idle to any RPM whether or not you DO or DO NOT have mech adv at idle (& yes at 4K you certainly will have adv in an unlocked "regular" dist. Any takers? Please! & I definitely will pay if I lose! EDIT It ain't gambling, it is "paid" edumacation (Moparts style). MORE EDIT yes the timing will change when the weights/springs move in the slots but the RP position will NOT change