Grit dog wrote:
Thank you, makes sense. Maybe why MSD rarely kicks in on our Charger. It hits 8th so soon in normal or Eco mode that I have to kick it down a gear (can't in Eco, paddles and manual mode are disabled) so it's not borderline lugging at that 45-55mph range.
Not sure about the Charger, but on my truck Eco is independent of MSD. Careful listening and with a scanner verified it.
In 8th, at 55 mph / 1200 rpm, I can maybe maintain 4 cyl if road is absolutely flat with a tailwind. In 7th, 50 mph, 1500 rpm, it'll maintain 4 cyl comfortably.
8th gear will maintain Eco "status" up to 70-75 mph or so, but V8 mode.
I bet a Charger can maintain 4 cyl mode longer due to much less drag.